// #eevblog — 2020-03-21
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00:01:09 <Lemon> now the scope is acting up
00:01:19 <Lemon> I got the sig gen on channel one, triggered
00:01:28 <Lemon> but on channel two (the pulse gen) it wont trigger
00:01:34 <Lemon> any explaination ?
00:02:38 <K> which channel does it trigger on?
00:02:44 <Ysjoelfir> Does it have two seperate timebases?
00:02:54 <Ysjoelfir> if not, you just can't trigger on both channels at once^^
00:03:03 <Lemon> on that kind of scope it should no ?
00:03:37 <Ysjoelfir> I have exactly one scope with two timebases^^
00:03:43 <Ysjoelfir> and you know that I collect scopes
00:04:04 <Lemon> but how the hell are you supposed to use math functions between multiple channels ?
00:04:06 <Lemon> if it cant trigger
00:04:15 <Ysjoelfir> well...
00:04:36 <Ysjoelfir> when the signals aren't coupled in any way, why would you do math with them?
00:04:50 <Lemon> well idk but theres options to do that
00:04:50 <Ysjoelfir> it's like substracting a lemon from a river
00:05:07 <Lemon> haaa so if both signals are coupled
00:05:12 <Lemon> I need only one timebase ?
00:05:19 <Lemon> and it will appear triggered on both channels ?
00:05:37 <Ysjoelfir> not neccessary
00:05:50 <hsn> sorry to inturrept guys there is eevblog channel on (matrix.org) .. claiming to be official ..
00:06:16 <hsn> https://snipboard.io/94UdiR.jpg
00:06:26 <Ysjoelfir> it would, if both signals have a common timebase. like, if input A is a multiple or fraction of input Bs frequency
00:06:35 <Ysjoelfir> or vice versa
00:07:14 <Ysjoelfir> whats that hsn?
00:10:20 <Ysjoelfir> correction lemon: I have actually two scopes with dual timebases
00:10:32 <Lemon> well thats weird
00:10:39 <Ysjoelfir> http://w140.com/tekwiki/wiki/556 that and http://w140.com/tekwiki/wiki/565 that
00:10:39 <Lemon> I had thought those scopes would have two
00:10:44 <Lemon> or at least a way to do it
00:13:07 <Ysjoelfir> however, to come back to your initial question: ringing is usually caused by parasitic inductances or capacitances, which is why I suggested that you try adding a cap. feel free to vary the size and overve the result, if any is visible. also it can be the loading of the circuit - if the load is too small, the generator can voershoot
00:13:26 <Ysjoelfir> graa
00:13:29 <Ysjoelfir> overve = observe
00:13:39 <Ysjoelfir> voershoot = overshoot
00:13:55 <Lemon> ok but that cap
00:13:59 <Lemon> where should I add it ?
00:14:01 <Lemon> to the output ?
00:14:06 <DHess_US> So now I know. The supply chain to the grocery stores is broken and things are much worse than they appear.
00:14:08 <Lemon> a 0.1uf changed nothing there
00:14:12 <Lemon> should I try 10uf ?
00:14:29 <K> what happened, DHess_US ?
00:14:32 <Ysjoelfir> I would try going smaller as well.
00:14:38 <Ysjoelfir> DHess_US - whats going on?
00:14:52 <DHess_US> The grocery stores are not receiving shipments.
00:15:13 <Ysjoelfir> why?
00:15:16 <DHess_US> Shelves are depleted not because of excess demand but because of lack supply.
00:15:39 <DHess_US> Fuck if I know. I heard a store employee talking about it two days ago and I verified it this morning.
00:15:52 <Ysjoelfir> how did you verify?
00:16:01 <DHess_US> By being there when they openned.
00:16:17 <DHess_US> Shelves were *not* restocked from the previous evening.
00:16:28 <K> hm, how about different stores?
00:16:46 <DHess_US> I wouldn't know but I'm in the midwest.
00:16:55 <Ysjoelfir> well, that could also be because they just didn't receive any goods this day? where I live they usually get goods around 2 days a week
00:17:33 <DHess_US> Ysjoelfir, what did I just say?
00:17:41 <DHess_US> <DHess_US> The grocery stores are not receiving shipments.
00:18:42 <Ysjoelfir> yes. I can read, thanks. But: do they USUALLY get shipments every day, or could it be that they just did not restock because the next shipment arrives on monday?
00:19:05 <Ysjoelfir> As I wrote -> [14:16:54] <Ysjoelfir> [well, that could also be because they just didn't receive any goods this day?]...] where I live they usually get goods around 2 days a week
00:19:06 <DHess_US> Yes, they usually get shipments every day.
00:19:32 <Ysjoelfir> thanks. Then I believe it's well possible that it is indeed a problem in the supply chain
00:19:37 <Ysjoelfir> fuck "just in time" logistics ;)
00:20:00 <DHess_US> I wouldn't have checked except for overhearing the employees responsible for stocking talking about it a couple days ago.
00:21:47 <Ysjoelfir> so who is responsible? delivery services? Production? pre-production?
00:22:02 <Ysjoelfir> or is it even a problem in the management
00:22:32 <DHess_US> All I know is products are not being delivered. Maybe they were diverted.
00:23:09 <K> a hickup, maybe?
00:23:49 <K> combined with maybe somewhat increased buying it would have more visible impact
00:24:08 <K> or are you in doom-and-gloom mood already, DHess_US?
00:24:15 <DHess_US> Ysjoelfir, the 556 and 565 do not have "dual timebases" in the same way. The 556 has dual independent timebases. The 565 has a dual delayed timebase.
00:24:26 <Ysjoelfir> That's true.
00:24:45 <Lemon> I cant find if my tds 540 got two timebase or not
00:24:50 <Lemon> it seems it doesnt
00:24:54 <DHess_US> Almost all dual timebase oscilloscopes are like the 565 and not the 556.
00:24:56 <Lemon> thats weird for that kind of scope
00:25:10 <DHess_US> lemon, the 540 has a dual delayed timebase
00:25:17 <Lemon> ho !
00:25:26 <DHess_US> lemon, the easy way to tell is if there are separate A and B triggers.
00:25:30 <Lemon> so that mean I can trigger two things, but show them one at a time ?
00:26:00 <DHess_US> It means you can display the second timebase after a delay determined by the first timebase.
00:26:03 <Lemon> because I tried many things but as long as one channel got a triggered signal, I cant trigger the second one
00:26:11 <DHess_US> It means the first timebase can be used to delay the second timebase.
00:26:21 <Lemon> hmmmm
00:27:09 <DHess_US> You can display either, and sometimes both, but the first timebase is the delaying timebase and the second timebase is the delayed timebase.
00:27:44 <Lemon> ok I need to read the manual more, I dont fully understand
00:27:51 <Lemon> right now im playing with the siglent gen software
00:28:14 <DHess_US> A dual delayed timebase has several uses but they are less necessary on a DSO.
00:28:28 <Lemon> I was also looking at the fan in my 540
00:28:34 <Lemon> just through holes, on the side
00:28:40 <Lemon> it seems to be a bigass motherfucker
00:28:54 <Lemon> even bigger than 140mm no ?
00:29:27 <K> overshoot now, fan later, Lemon
00:29:49 <Lemon> haha well that overshoot issue seems to be found
00:29:58 <Lemon> as Ysjoelfir said its simply the ringing due to the 555
00:30:04 <K> and what are you going to do about it?
00:30:05 <Ysjoelfir> nono
00:30:06 <Lemon> I tried some caps on the ouput, it doesnt change a lot
00:30:10 <Ysjoelfir> not due to the 555^^
00:30:16 <Lemon> no ?
00:30:22 <Lemon> my life has been a lie ?
00:30:23 <Ysjoelfir> ringing happenes not only with a 555
00:30:24 <K> what about loading the output more?
00:30:25 <Lemon> thats what you say ??
00:30:25 <Ysjoelfir> xD
00:30:30 <Lemon> ha I know !
00:30:34 <Lemon> but in that precise case
00:31:03 <Lemon> my scope probe is a 8pf one
00:31:08 <Lemon> so I guess its not loading it a lot no ?
00:32:12 <K> resistive loading was what i meant
00:32:31 <Ysjoelfir> oh ok. then I misunderstood you. :) The parasitics can come from a whole lot of stuff. the scope probe, wires, the 555, your breadboard,...
00:32:42 <Ysjoelfir> but: as K said, try loading the output
00:38:17 <Lemon> but how can I load the ouput ?
00:39:17 <DHess_US> 555 doesn't generate very fast edges. If you are having problems, decoupling the power supply with a 0.1 ceramic *and* a 1uF solid tantalum or 10uF aluminum electrolytic.
00:39:27 <DHess_US> *At* the 555.
00:39:32 <DHess_US> And use a single point ground.
00:39:47 <DHess_US> The 555 suffers from shoot through making it rather noisy.
00:40:12 <Ysjoelfir> [14:38:17] <Lemon> but how can I load the ouput ? --> just shove a resistor to ground at the output?^^
00:41:41 <Lemon> ok im going to try both propositions ! thanks guys
00:41:46 <Lemon> gotta help the mother first
00:42:57 <Ysjoelfir> what DHess_US wrote is good design practice that you can use on many circuits.
00:43:21 <Ysjoelfir> since you start experimenting with real circuits, you might want to start a cheat sheet with stuff like that :)
00:43:24 <Lemon> but whats the difference between a solid tantalum and a lytic ?
00:43:32 <DHess_US> I usually isn't necessary but the 555 is an exception because its output stage was poorly designed.
00:44:00 <Lemon> honestly I dont understand more than 10% of what im doing
00:44:04 <Ysjoelfir> but in most cases it can't hurt either
00:44:05 <Lemon> I really need to start from the basics
00:44:14 <DHess_US> Lemon, what matters is ESR at high frequencies. It takes 4 to 10 times as much capacitance in an aluminum electrolytic to get the same ESR as a solid tantalum capacitor at high frequencies.
00:44:42 <Lemon> ho ok thats where esr comes into play
00:44:56 <DHess_US> But if the ESR is too low, like with a ceramic capacitor, then that causes problems also.
00:45:16 <DHess_US> So you use a low capacitance ceramic in parallel with a larger tantalum or electrolytic.
00:45:28 <Lemon> hmmm that makes sense !
00:45:32 <Lemon> so 'fast edges'
00:45:40 <Lemon> are basically when a square wave is perfectly square
00:45:42 <Lemon> for example ?
00:46:26 <DHess_US> Roughly. What is really going on is that the power supply connections form a transmission line which the "medium" ESR tantalum or electrolytic capacitor terminate preventing ringing.
00:47:04 <DHess_US> In theory you could tune it with a ceramic capacitor in series with a low value resistor but in practice a solid tantalum or electrolytic capacitor is better.
00:47:25 <Lemon> I dont have tantalums sadly
00:47:31 <Lemon> but I have some electrolytics
00:47:49 <Lemon> ok brb guys
00:49:32 <DHess_US> start reading page 25 here, https://www.analog.com/media/en/technical-documentation/application-notes/an47fa.pdf
00:49:48 <DHess_US> It discusses it as a practical level.
00:50:19 <hsn> [16:44:13] <DHess_US> Lemon, what matters is ESR at high frequencies. It takes 4 to 10 times as much capacitance in an aluminum electrolytic to get the same ESR as a solid tantalum capacitor at high frequencies.
00:50:33 <hsn> woh, are we talking about esr or capacitance ?
00:51:22 <DHess_US> hsn, ESR and how it applies to terminating a power connection.
00:52:09 <hsn> oh .. so high aluminum caps are low esr ?
00:52:15 <DHess_US> Or why it is that adding a larger higher ESR capacitor for "bulk decoupling" suppressing power line ringing while doing the same with a ceramic capacitor makes it worse.
00:52:44 <hsn> so if a linear regulator suggests me to put 10uF tantalum at output .. i can put 100uF aluminum lytic ?
00:52:52 <DHess_US> Yep
00:53:08 <DHess_US> The capacitance isn't what matters then; it is the ESR.
00:53:53 <DHess_US> That is also why putting a small ceramic decoupling capacitor at the output of a regulator is usually useless or ill advised.
00:53:56 <hsn> yep but still it will be better if i wanted that circuit to have (some time to save some power dip log) in a flash memory
00:54:27 <DHess_US> That is what the *input* capacitor is for.
00:54:45 <DHess_US> Although sometimes they use the output capacitor for that. It is just not as effective.
00:54:52 <hsn> im afraid that power dip will take from the input xD
00:55:56 <hsn> i use an inductor ---> mosfet for polarity protection ---> bulk cap for slow power down
00:56:21 <hsn> inductor to reduce inrush current
00:56:48 <hsn> although i just put 10mH with no calculations ..
00:57:12 <hsn> in before the inductor i put resistor divider that goes to the microcontroller to detect power dip
00:57:27 <hsn> is that (how u doing) ?
00:57:29 <hsn> xD
00:59:33 Quit: arekm ([email protected]) Ping timeout: 121 seconds
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01:01:40 <DHess_US> I've done it that way before.
01:04:08 <EEVBlog> New EEVBlog Retweet: LBRY: our graphics expert isn't working today but ain't no way we are waiting to share this video on https://t.co/qqXdRJ7qWb is now at least 3x faster 🚀 In the US, up to 4K should be smooth as 🧈, 2K in Europe🇪🇺 Asia and Oceania we are coming for you next! 🔜 https://t.co/5Vdq7se1JD
01:49:27 Quit: Ysjoelfir ([email protected]) Connection closed
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02:53:46 <Lemon> if I were to replace smd caps in my tek tds 540, does it need to be high quality caps or those will do for the trick for years ? DHess_US https://www.ebay.fr/itm/400pcs-24-Values-SMD-Aluminum-Electrolytic-Capacitors-Assorted-Kit-1uF-1000uF-zg/233174232326?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D20131003132420%26meid%3Da46f5482992d4f00a6aa83277d58dc8f%26pid%3D100005%26rk%3D2%26rkt%3D12%26mehot%3Dco%26sd%3D121085737091%
02:53:46 <Lemon> 174232326%26pmt%3D1%26noa%3D0%26pg%3D2047675%26algv%3DSimplAMLv5PairwiseWeb&_trksid=p2047675.c100005.m1851
02:58:33 <Lemon> well looking at it, a nichicon smd lytic cap is 20 cents
02:58:37 <Lemon> so its not much more expensive
02:58:47 <Lemon> as I only need a hundred
02:58:54 <K> what is total difference in EUR?
02:59:31 <Lemon> well I dont need 400, so if I buy them for 15 euros ok its a tad cheaper, but if I go for nichicon ones it will cost me 18-20 euros
02:59:39 <Lemon> so I'll go for higher quality ones
03:09:57 <K> get nichi ones
03:10:13 <Lemon> im pretty sure those faint lines I get on the display are a sign of bad caps
03:10:17 <Lemon> its not a huge deal
03:10:22 <Lemon> but once you see them, grrr
03:14:07 <Lemon> anyway as long as it works I wont touch caps
03:14:14 <Lemon> but I want to have them in case it fails on me
03:32:55 <hsn> sso
03:33:14 <hsn> there is some embedded dev environment tools from google
03:33:25 <hsn> what ever that is it looks cool
03:33:40 <hsn> its called "PigWeed"
03:37:21 Join: Ysjoelfir ([email protected]) to #EEVblog
03:37:21 Quit: Ysjoelfir ([email protected]) Changing hosts
03:37:36 <Ysjoelfir> hello
03:38:38 <AndrevS> hi
03:42:38 <K> hm, it is not immediately clear what this "PigWeed" it is for
03:42:57 <Ysjoelfir> what?
03:43:20 <K> https://pigweed.googlesource.com/pigweed/pigweed/+/refs/heads/master/README.md
03:43:28 <Ysjoelfir> (Anyone a suggestion how low I should set the TTL for my DynDNS?)
03:43:38 <K> 32-bit mcu's, so it would seem
03:43:44 <Ysjoelfir> oh, ok
03:43:46 <K> yet another build system, yay
03:43:51 <rust_collector> ding dong
03:43:56 <Ysjoelfir> hi rusty
03:44:03 <rust_collector> hey-o
03:46:23 <rust_collector> it is the day before the day before sunday! I have to make some kind of office 360, or powerpoint or paypal or something thing, so I can write down my work hours
03:48:27 <K> scrap of paper is too pleb for you?
03:49:45 <rust_collector> yes
04:07:13 <hsn> yess build system is the word
04:14:24 Quit: Ysjoelfir ([email protected]) Ping timeout: 121 seconds
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04:22:29 <rust_collector> HEEY! Ysjoelfir !!!
04:22:37 <Ysjoelfir> hi
04:22:45 <rust_collector> helluuu
04:22:50 <rust_collector> again
04:23:00 <hsn> hello Ysjoelfir
04:23:13 <Ysjoelfir> hello darkness my old frioend
04:23:13 <EEVBlog> Hello there, Ysjoelfir!
04:23:17 <Ysjoelfir> lol#
04:24:02 <rust_collector> I want someone to make a diy chunnel, just for hobby use
04:24:07 <hsn> your DynDNS = your running local host ?
04:24:27 <hsn> local server*
04:26:19 <hsn> i think dynamic usually set to 1 min ? but not sure
04:26:23 <Ysjoelfir> no. webserver. but pointing to my fritzbox
04:28:25 <hsn> fritzbox = ur router ?
04:30:03 <hsn> so ur going to run local webserver but open port (80) or somthing on the router firewall right ?
04:30:06 <Ysjoelfir> yes
04:30:10 <Ysjoelfir> no
04:30:21 <Ysjoelfir> I just want to reach the router from everywhere
04:31:06 <hsn> aah
04:32:09 <Lemon> so theres something weird on my tds 540 display
04:32:20 <Lemon> it seems that when something, like aline of text is displayed
04:32:28 <Lemon> intensity on that line goes down
04:32:45 <Lemon> so you can see some faint lines, if theres a square box of plain white next to the text for example
04:34:16 <rust_collector> some guy is coming to look at my old car tomorrow. I am not sure if I hope he wants to buy it or not
04:34:42 <Ysjoelfir> why is that rusty?
04:34:43 <Lemon> https://imgur.com/a/D5SwUc6
04:34:47 <Ysjoelfir> lemon: sounds like... erm...
04:34:54 <Lemon> I took a picture
04:35:34 <Ysjoelfir> ah
04:35:47 <Ysjoelfir> we have that same "phenomenon" on one of our ancient power analyzers
04:35:53 <rust_collector> that is because... i sort of like the old bucket. but otoh, that guy might get it out on the road again, which would be nice
04:36:06 <Ysjoelfir> I assume it is just an artifact of bad display technology from that time, not sure though
04:36:15 <Ysjoelfir> did you try adjusting the contrast?
04:36:26 <Lemon> well I looked on youtube and the guy had a nice display
04:36:26 <Ysjoelfir> which car is it rust?
04:36:28 <Lemon> on the same scope
04:36:33 <Lemon> yeah I played with contrast
04:36:48 <rust_collector> it is a -67 plymouth valiant
04:39:35 <Lemon> wow thats a nice car
04:39:59 <Ysjoelfir> oh, that one. nice and sad
04:41:39 <rust_collector> it was a good little car. I just do not have any interest in cars any more
04:45:20 <Lemon> im tempted to open the tds to see if theres leaking caps
04:45:25 <Lemon> and see if I really need to do it or not
04:45:30 <Lemon> every selftest pass
04:45:42 <Lemon> it seems to work flawlessly besides that weird display issue
04:45:45 <Lemon> which is manageable honestly
04:45:48 <Lemon> I could live with it
04:46:00 <K> post a pic on forum
04:46:00 <Lemon> but I read soooo much bad things on those series of scopes about caps
04:46:24 <Lemon> yeah I could I have no account there
04:46:27 <Lemon> maybe its time
04:46:45 <rust_collector> yeah, do that before you cut that thing in half
04:46:57 <Lemon> ho honestly
04:47:03 <Lemon> if I open it and see no apparent leakage
04:47:09 <Lemon> I'll simply use it until it fails
04:47:17 <rust_collector> we will see...
04:47:23 <Lemon> but I want to order caps right now to have them on hand
04:47:24 <K> you open it and there is a cockroach kingdom
04:47:34 <Lemon> im not too found on doing those kind of repairs you know
04:47:38 <Lemon> if it can be avoided
04:47:46 <Lemon> well the scope looks like new
04:48:00 <Lemon> its in really nice condition and theres still some cal stickers from 2011
04:48:05 <Lemon> I can lift them :>
04:48:09 <Lemon> without cutting them
04:48:12 <Lemon> even if it doesnt matter
04:48:58 <rust_collector> a schlong ass you has fun
04:58:17 <Lemon> OK
04:58:21 <Lemon> I might have found the issue !
04:58:32 <Lemon> so those are called 'raster lines' I totally forgot the name
04:58:39 <Lemon> that makes sense, and theres an adjustment to be done
04:58:46 <Lemon> but it needs a photometer anda x6 magnifier blabla
04:58:59 <Lemon> can Ijust turn the variable resistor until I see them disappear ?
04:59:01 <Lemon> I mean, it should work
05:02:04 <hsn> learn kicad vs download cracked altium ?
05:02:18 <hsn> at home pc
05:03:35 <hsn> no .. im not ready to do pcbs yet .. wanna learn some math
05:05:13 <rust_collector> if you had a cracked kicad, I would vote for that, but if that is not an option, cracked altium
05:06:20 <Lemon> - Observe the luminbance patches using a 6X magnifier
05:06:23 <Lemon> wtf tektronix
05:06:30 <Lemon> my eyes AINT ENOUGH ???
05:06:46 <hsn> rusty , i think u vote so u see me in jail :)
05:06:47 <rust_collector> if you have very small eyes...
05:06:59 <rust_collector> hsn, well... maybe?
05:07:09 <Lemon> I think im just going to fiddle with contrast/brightness resistors adjustement
05:07:12 <Lemon> and see if it disappears
05:07:24 <hsn> rusty, u cant see me in jail while u outside :)
05:07:33 <rust_collector> just make a mark where it is, so you can at least put it back?
05:08:04 <rust_collector> Jails these days have cameras, so I can just watch you online
05:08:21 <rust_collector> https://www.youtube.com/watch?v=7_H_rWs4RhQ
05:08:34 <rust_collector> Maybe I just have a thing for pirates
05:08:37 <hsn> nude
05:09:08 <rust_collector> nope
05:09:09 <hsn> i've seen government PCs running cracked softwares :)
05:14:13 <hsn> https://www.khanacademy.org/math/early-math/cc-early-math-counting-topic/cc-early-math-counting/v/counting-with-small-numbers?modal=1
05:15:06 <hsn> counting to 7 .. "lets keep going , this is lot of fun" .. same guy teaching differential equations ..
05:15:13 <hsn> how ? :'(
05:53:36 <Lemon> ok so I openned the scope
05:53:40 <Lemon> seems caps are fine
05:53:54 <Lemon> I think some are starting to slowly leak, but im not sure
05:54:03 <Lemon> most solder joints are shiny
05:54:15 <Lemon> but theres another problem, one heatsink is lose and fell
05:54:30 <Lemon> I really dont know how to put it back
05:54:40 <Lemon> it seems to use some glue/coumpond
05:55:10 <rust_collector> then you should probably use that
05:55:13 <Lemon> its a 2x2 cm heatsink and looking at how crusty it was, it seems its been a long time
05:55:18 <Lemon> I dont have any
05:55:23 <Lemon> I have pads, reagular tim
05:55:58 <rust_collector> well, that is always handy to have around?
05:56:13 <Lemon> that glue adhesive compound ? you ever used it ?
05:56:17 <Lemon> I never saw some before
05:56:43 <rust_collector> it is sort of like epoxy with some stuff in it
05:56:49 <rust_collector> it is not cheap
05:56:50 <Lemon> yeah
05:57:51 <rust_collector> can you fit a small clamp in there? maybe 2 metal strips, and 2 small bolts?
05:58:00 <Lemon> thats what im looking to do yeah lemme see
05:58:39 <rust_collector> but, what was the heatsink attached to?
05:59:50 <Lemon> a chip, glued on it
05:59:57 <Lemon> it seems it worked well without it but heh
06:00:02 <Lemon> if it was there it was for a good reason
06:00:11 <rust_collector> yes, but that chip is a???
06:00:13 <Lemon> I think I can try to put some wire somehow to hold it
06:00:17 <Lemon> some sort of asic
06:00:21 <Lemon> nothing written on it
06:00:24 <Lemon> 2x2 cm square boi
06:01:00 <Lemon> im going to clean both the best way I can
06:01:18 <Lemon> and put a square thermal pad
06:01:21 <Lemon> hold it somehow
06:01:29 <rust_collector> are you really going to file them flat?
06:01:29 <Lemon> it sucks because its on the wrong side of the instrument
06:01:32 <Lemon> gravity isnt helping
06:08:45 <Lemon> ok the heatsink is somewhat clean
06:08:51 <Lemon> but I dont want to insist too much on the chip
06:08:53 <DHess_US> lemon, the capacitors aren't anything special. I'd get high grade high temperature ones which are a little more expensive but that is up to you.
06:09:09 <DHess_US> Do *not* get polymer electrolytic or polymer tantalum.
06:09:18 <Lemon> ok thanks !! I looked and most got shiny solder joints
06:09:34 <Lemon> some got solder joints that are a bit rougher, idk if its leakage or not
06:09:40 <Lemon> but it seems clean overall so no hurry
06:09:42 <DHess_US> And honestly, I might get solid tantalums voltage derated by 50% or more but I am sure the electrolytics will last longer than the remaining life of the oscilloscope.
06:10:02 <Lemon> remaining life ??? I want it to last forever !!!
06:10:03 <Lemon> :>
06:10:09 <Lemon> but the problem right now is higher
06:10:12 <Lemon> a heatsink fell
06:10:28 <Lemon> and the conpound on it was all crusty so I guess it was already in the enclosure
06:10:33 <Lemon> no on the chip anymore
06:10:42 <DHess_US> If you never want to replace the capacitors again, then replace them with solid tantalums 50% voltage derated and 1/10th to 1/4 the capacitance.
06:11:34 <DHess_US> Although the capacitance is not critical. Use the same value if you like but it will be more expensive.
06:12:21 <Lemon> how much would that cost for like 100 caps ?
06:12:27 <Lemon> they are small eletrolytics right no w
06:12:55 <DHess_US> Have to look it up. Wbat voltage and capacitance are the ones you need?
06:14:01 <hsn> why no polymer tantalum ?
06:14:06 <DHess_US> ESR too low
06:14:09 <Lemon> thats a good question sadly they are really small and I dont have found the schematics yet
06:14:26 <DHess_US> The voltage and capacitance are marked on them.
06:14:49 <Lemon> yeah im going to see after I fix that fucking heatsink that fell
06:14:56 <Lemon> it worries me as I dont have plaster compound
06:15:05 <Lemon> im going to use thermal pads of good quality and fix it somehow
06:15:18 <Lemon> it was working well without it it seems, but well it will be better with it :>
06:15:45 <DHess_US> About $12 per 100 at the low end.
06:15:50 <DHess_US> So not bad at all.
06:16:42 <Lemon> ho fine its not that expensive
06:16:47 <Lemon> it will be just exhausting to do
06:16:56 <Lemon> Ive never worked with smd before so its a bit scary
06:17:55 <DHess_US> The tantalum packages are easier to solder but you need to check the dimensions before ordering to make sure they will fit.
06:19:29 <DHess_US> The way I do SMD packages like that is to unsolder the old part and remove it, then use solder wick to clean up the pads, then that leaves enough solder to tack down the new part, and then I apply new solder.
06:20:21 <DHess_US> bbiab
06:20:58 <Lemon> hmmm ok I keep that in mind
06:21:05 <Lemon> so for that fucking heatsink
06:21:16 <Lemon> its on the wrong side so it wont hold without proper glue like compound
06:21:18 <hsn> DHess_US whats ur name :)
06:21:23 <Lemon> I dont have it so it will be a quick fit
06:21:31 <Lemon> fix
06:25:24 <Lemon> fucking hell another one just fell in my hands
06:25:30 <Lemon> but the first one seem to hold
06:25:39 <Lemon> haaaaa
06:26:17 <rust_collector> always nice to have some of that stuff laying around
06:32:20 <Lemon> yeah but I dont have it
06:34:06 <rust_collector> riiight.... it really is very handy
06:35:09 <hsn> u can buy it from pc shops
06:35:38 <hsn> they use it for cpu
06:36:23 <rust_collector> they glue pc cpus?
06:38:18 <hsn> heatsink
06:41:58 <rust_collector> why would they do that?
06:43:09 <Lemon> you use regular tim for that
06:43:17 <Lemon> for chips you need some glue like compound
06:43:25 <Lemon> but well it seems to hold when its on its side
06:43:39 <Lemon> I turned it on to adjust the contrast, it helped a bit but not much
06:43:56 <Lemon> gonna put the case on and hope those heatsinks will hold, im going to order plaster tim
06:44:19 <Lemon> just 3min on and those chips were ultra hot, as the fan isnt moving the air in the case properly
06:44:19 <rust_collector> plaster?
06:44:29 <Lemon> its called that it seems
06:44:34 <rust_collector> heh
06:44:35 <Lemon> plaster thermal compound
06:44:40 <Lemon> or maybe its a bad traduction
06:45:04 <rust_collector> is this ebay
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07:01:50 <Lemon> I wonder if tekscopes got overheating protections
07:02:08 <rust_collector> yeah, but some times they fall off
07:02:18 <Ysjoelfir> A tek that doesn't heat your room isn't a good tek :P
07:03:16 <rust_collector> any scope that uses a lot of time to make you a nice grilled cheese sandwich is pretty meh
07:05:10 <Lemon> Ysjoelfir ! openned the tek 540 and I saw a heatsink that was like, in the box
07:05:21 <Lemon> idk if it fell when I openned it or if it was already there
07:05:21 <Ysjoelfir> i read that :D
07:05:30 <Lemon> but the compound was all crusty !
07:05:35 <Lemon> and I touched another one and it fell too !
07:05:45 <Lemon> so I used some artic thermal pads and put them, it seems to stick a bit
07:05:50 <Lemon> but they are on the wrong side :/
07:05:55 <Lemon> so idk if it will hold or not
07:06:05 <Lemon> now I fear that one will fell and the chip cook itself
07:06:14 <rust_collector> put a spring on them, and ploink the cover back on it
07:06:31 <Lemon> impossible, the cover is like the worst design ever
07:06:39 <Lemon> I sweated to put it back, and take it off too
07:06:44 <rust_collector> ok, so it could take some time
07:06:46 <Lemon> its the whole case that slides
07:07:13 <Lemon> well I adjusted what I wanted to adjust but I still see raster lines
07:07:17 <Lemon> guess I'll live with it
07:07:26 <rust_collector> I guess so
07:10:17 <Lemon> some peeps just use epoxy
07:10:19 <Lemon> and nothing else
07:10:29 <Lemon> maybe I could have used some glue
07:10:33 <Lemon> with my thermal pads
07:11:10 <rust_collector> don't mess that thing up completely, just because you do not have the thing you need right now
07:11:23 <Lemon> no but dude what if they fell and I dont hear them ?
07:11:26 <Lemon> and it cooks itself ?
07:11:36 <Lemon> ok you are right
07:11:43 <Lemon> im just going to stop using it till I have what I need
07:11:44 <rust_collector> ??? lol
07:11:46 <rust_collector> yes
07:11:52 <Lemon> yeah yeah I didnt read correctly sorry
07:12:05 <Lemon> it pisses me off
07:12:13 <rust_collector> yes, you should be ashamed
07:12:21 <rust_collector> reading that wrong
07:12:24 <rust_collector> arrrgh
07:12:34 <Lemon> :>#
07:13:17 <Lemon> lets see if amazon got some
07:13:27 <Lemon> I dont want to wait years to use my scope
07:13:34 <Lemon> garrrg that and caps
07:13:41 <Lemon> well, caps looked ok
07:13:55 <Lemon> I just saw some corrosion on a few solder joint
07:14:00 <rust_collector> you do not measure them by looking
07:14:03 <Lemon> but only on one card, strangely enough
07:14:16 <Lemon> well corroded solder joint are a good visual indicator
07:14:21 <rust_collector> sure
07:14:45 <rust_collector> but no corrosion does not mean the caps are in good shape
07:14:55 <Lemon> thats true
07:16:21 <Lemon> honestly the compound I removed looked like glue
07:16:39 <Lemon> I guess the coumpond itself isnt as critical as on a pc cpu
07:19:32 <Lemon> pfff ok in fact tons of peeps are using what I thought, regular TIM with one or two tiny drops of glue, the glue itself doesnt matter you just dont need to use too much if you want to remove it later
07:20:16 <hsn> rust_collector --> https://www.youtube.com/watch?v=-hNgFNH7zhQ
07:20:38 <rust_collector> that says thermal paste?
07:21:03 <Lemon> its not the case I have
07:21:15 <Lemon> its on tiny chips with no retention socket
07:21:23 <Lemon> so basically what holds the sink is the paste itself
07:21:34 <Lemon> but np im gonna do the glue/pads trick and it will be perfectly fine
07:21:38 <rust_collector> and it is a different compound that what we were talking about
07:21:48 <hsn> ooh
07:21:48 <Lemon> some even use only glue lol
07:22:03 <Lemon> and seeing what I removed, I wouldnt be amazed if it wasnt only glue
07:22:04 <hsn> what is the other compound ?
07:22:17 <rust_collector> thermal conductive adhesive
07:22:20 <rust_collector> or glue
07:22:57 <hsn> difference in funcionality?
07:23:10 <Lemon> it holds :>
07:23:19 <Lemon> on a cpu for example you have a system to hold the cpu in place
07:23:27 <Lemon> regular tim doesnt stick enough
07:23:42 <hsn> but thermal paste also hold "little" right ?
07:23:44 <Lemon> thats why on tiny chips that got no retention thingies you use thermal glue thingie
07:23:52 <rust_collector> glue makes the heat sink stay on the chip, regular thermal compound is grease, which does not hole a chunk of metal in place
07:23:55 <Lemon> yes thats what I bet on right now but its no solution
07:24:03 <Lemon> if it fells while hot af it will cook the chip
07:24:31 <rust_collector> Ysjoelfir, https://imgur.com/a/CnaNDRP
07:24:38 <rust_collector> I did some fanking
07:24:50 <hsn> wait .. cheap chineese modules with heatsink + screw = thermal paste ?
07:24:55 <Ysjoelfir> nice :D
07:25:16 <rust_collector> yep, good offal
07:25:32 <hsn> cause the screw holds the sink anyway
07:25:53 <rust_collector> what?
07:25:58 <hsn> but when i remove the sink it has white thingy which is sticky .. so i thought they are same
07:26:23 <rust_collector> yeah, it dries up a bit, but it is not really the same
07:26:57 <hsn> ok
07:27:21 <rust_collector> why do all the "how to apply thermal paste" videos use amd cpus?
07:27:36 <rust_collector> mm, ok, I only looked at 2
07:27:52 <hsn> bcz AMD is HOT!
07:27:53 <hsn> ?
07:28:41 <rust_collector> no, they just have a 20 degree offset on the temp sensor, lol
07:31:21 <rust_collector> ok, I am going to have some mashed kids for dinner... brb
07:31:35 <Lemon> rek em !
07:32:05 <Lemon> tommorow I'll take the scope on the operation table, wiggle every heatsink to see if they come easily and glue every of them with a new thermal pad
07:32:08 <Lemon> for peace of mind
07:32:13 <Lemon> and order caps
07:32:25 <Lemon> and so the day it fails, I will be ready
07:32:35 <Lemon> it will be hard and consuming, I'll probably cry and scream
07:32:41 <Lemon> but I'll be happy once it works again
07:41:45 <hsn> https://youtu.be/mDuXbhXe5Es?t=605
07:41:58 <hsn> ^^ Re: A silly question about LED
07:42:02 <hsn> Surprisingly, LEDs can actually be run with a 20kV supply and still work:
07:47:04 <hsn> Ysjoelfir found another eevblog near me : https://www.eevblog.com/forum/profile/?u=116112
07:47:09 <hsn> :P
07:47:43 <rust_collector> wow, so there is 3 of you people
07:48:06 <Ysjoelfir> xD nice
07:48:07 <hsn> someone git cloned us
07:48:17 <Ysjoelfir> not svn?
07:48:22 <hsn> nop
07:48:23 <rust_collector> git
07:49:05 <rust_collector> git has the license you can just ignore, so that is better
07:49:42 <rust_collector> because those kinds of people seems to think licenses mean something for normal people
07:50:22 <hsn> what?
07:50:59 <rust_collector> always git, never svn
07:51:13 <hsn> i acutally didnt know git original author is linus
07:51:24 <rust_collector> ok
07:51:39 <hsn> gpl2 = always open ?
07:51:52 <coppice_> svn is bowl of sadness
07:52:09 <rust_collector> gpl2=always ignored by non-companies, and old bearded fat people
07:52:16 <hsn> i actually dont know svn .. i only know altium uses it
07:52:58 <hsn> which one a company can make it commarcially closed product .. gpl2 or gpl3?
07:53:12 <coppice_> SVN is total rewrite if CVS. A lot of effort to recreate something lousy
07:53:21 <rust_collector> make it closed enough, and no one will know
07:53:40 <hsn> god knows rusty :)
07:53:53 <rust_collector> does he?
07:53:58 <hsn> yes
07:54:00 <rust_collector> good for him
07:54:07 <hsn> thats why we all going to hell
07:54:10 <hsn> xD
07:54:13 <rust_collector> i9 will ask the next time I see him
07:54:38 <hsn> ghaidra knows ?
07:54:45 <rust_collector> I think you have a different god than me, but...
07:55:03 <hsn> which one is ur god ?
07:55:14 <rust_collector> I have no idea
07:55:19 <hsn> ghidra knows **
07:56:56 <hsn> i also dont have idea
07:57:00 <hsn> so probably same ?
07:57:19 <rust_collector> hell no, Mine is different
07:57:29 <coppice_> ghidra is a nice tool
07:57:44 <hsn> it is indeed
07:57:49 <hsn> never used it
07:57:51 <hsn> though
07:58:20 <hsn> i used olydbg long long time ago once or twice without even knowing what i was doing ..
07:58:47 <hsn> fliped a conditional jmp instruction je to jne .. and the thing cracked ..
08:04:10 <rust_collector> https://www.youtube.com/watch?v=2VwG7DtGBBE
08:04:22 <Lemon> you know theres something sad with loving old pieces of electronic gear
08:04:30 <rust_collector> yes
08:04:32 <Lemon> ok you can fix them when you can find part and thats fun
08:04:44 <Lemon> but when something like a proprietary chip die
08:04:54 <Lemon> you get a big paperweight
08:05:15 <rust_collector> but it has a nice case, and a ctr built in
08:05:19 <rust_collector> crt
08:05:32 <Lemon> well sure but heh
08:05:47 <Lemon> thats why I like all analog stuff made with passive components
08:05:56 <Lemon> they can fail as much as they want you'll be replacing them easily
08:06:37 <rust_collector> I could make you an offer, but you are mr fancy underpants, and only want the xxxghz stuff
08:06:59 <Lemon> an offer for what ?
08:07:13 <Lemon> nah 500Mhz is prorably what I'll ever need for a long time honestly
08:07:13 <rust_collector> my scope looks like it has a diode, and 8 resistors, and a little transformer
08:07:34 <Lemon> heh its a good boi
08:09:22 <rust_collector> mostly yes. very low spec, very few features, but it looks ok
08:10:22 <hsn> rusty this guy should be pilot
08:10:35 <hsn> he likes switches
08:10:43 <rust_collector> yep
08:11:21 <rust_collector> I think it is interesting that he sort of knows what knobs to tweak to do something. Ok, he built that thing, but still
08:12:12 <hsn> does he
08:12:19 <hsn> maybe they all do same thing .. nothing
08:12:21 <hsn> :P
08:12:40 <rust_collector> Hey! it is a very cool looking mp3 player!
08:13:44 <hsn> he doesnt get tired?
08:14:06 <rust_collector> it is only 9 14 there
08:22:13 <Lemon> tommorow once every of those damn heatsinks will be glued and secured
08:22:35 <Lemon> I'll be a bit more at peace with this scope
08:22:47 <Lemon> I dont mind those raster lines, as I can perfectly read things
08:22:59 <Lemon> maybe it will go away the day I'll change caps
08:23:08 <Lemon> and with some luck that day will be in years
08:51:13 Quit: AndrevS ([email protected]) Quit: Leaving
09:26:33 <DHess_US> Some of today's adventures, https://imgur.com/a/ivvPCEe
09:27:36 <EEVBlog> New EEVBlog Retweet: CommodoreKazz: I got a new toy! @eevblog love the no bullshit packaging! https://t.co/KY00mSWWHv
09:29:08 <DHess_US> Also stopped by hospital and they were fully secured with Covid checkpoints at every entrance where they interrogated you and checked your temperature.
09:59:37 <Ysjoelfir> nice :)
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11:51:22 * T3sl4 pings Ampera's Garand
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17:49:34 <hsn93> K, gm
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18:16:14 <AndrevS> morning
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18:49:47 <AndrevS> hi
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19:25:00 <hsn> so i notice some DAP pads have grid solder paste layer under them : https://snipboard.io/y3GBgz.jpg
19:25:42 <hsn> is this to put vias in between the grid to avoid paste going through the via in reflow process ?
19:28:28 <hsn> like this : https://snipboard.io/ryPZaF.jpg ^
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19:42:47 <AndrevS> hi
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19:46:33 <T3sl4> hsn: if you don't do it, the mask fab will anyway; the reason is too wide of an unsupported region will get dished in
19:50:54 <hsn> hey T3sl4 how is ur place
19:51:02 <hsn> with the virus
19:51:21 <T3sl4> people are freaking out buying TP but there's not actually much of it around yet
19:52:17 <hsn> doesnt alcohol solve the problem ?
19:52:31 <hsn> as sanitizer ?
19:53:04 <hsn> buying TP = ? tp-link ?
19:53:11 <T3sl4> toilet paper
19:53:29 Nick: steve30000 is now known as steve30
19:57:45 <hsn> ah .. toilet paper to reduce going out in future ?
19:58:39 <hsn> thats not concern here as water is used in toilets instead of TP .. thats why i didnt know what TP stands for
19:58:44 <T3sl4> nah, warehouses have plenty, they just have to keep it on the shelves
19:59:07 <T3sl4> yeah, don't offer a handshake with your left hand over there ;)
20:00:55 Join: Lemon ([email protected]) to #EEVblog
20:01:01 <Lemon> sup thugs
20:01:02 <hsn> lol
20:01:55 <steve30> hello
20:01:55 <EEVBlog> Hello there, steve30!
20:01:58 <steve30> :D
20:02:06 <hsn> T3sl4 its so complicated .. i think u guys get disgusted from our way .. but imagine that we get disgusted from TP way ..
20:02:26 <hsn> hello steve , lemon
20:02:26 <EEVBlog> Hello there, hsn!
20:03:26 <T3sl4> hello
20:03:26 <EEVBlog> Hello there, T3sl4!
20:03:37 * T3sl4 slaps EEVBlog with a hifish
20:03:38 <Lemon> hello hello
20:03:46 <T3sl4> three in a row, crazy
20:04:15 <hsn> eevblog version
20:04:20 <hsn> eevblog status
20:04:20 <EEVBlog> Latest EEVBlog Retweet: M-ali Fahmide: @eevblog i think i went overboard with kapton tape https://t.co/ufQ6xkP8J9
20:04:39 <hsn> EEVBLOG help
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20:06:53 <hsn> T3sl4 i didnt understand why fab will grid it .. isnt stencil placing is big sponge with stencil paste ?
20:07:08 <T3sl4> mmm?
20:07:20 <hsn> going through laser cut stencil sheet?
20:07:25 <T3sl4> it's squeegeed on
20:07:50 <Lemon> I finally found some attenuators, 50ohm loads and adapters for cheap
20:08:45 <lbrywatcher> Hello,
20:09:22 <AndrevS> hi
20:09:35 <hsn> so if they didnt grid it .. there will be lot of lost of stencil paste on the "squeegeed"?
20:10:11 <lbrywatcher> i have a qeustion about the Tenma 72-7730A is it a reasonable multimeter if i can get it for 90 euro?
20:10:28 <hsn> and that wont be enough for the other pads behind of the large pad ?
20:10:49 <T3sl4> the squeegee is fairly rigid, but over such a wide unsupported distance, it will dip into the cavity, leaving less paste than intended
20:11:10 <hsn> ooh
20:11:19 <hsn> https://www.youtube.com/watch?v=adyYnF1h4Sk ^^
20:13:11 <AndrevS> I'm not familiar with that brand, but seeing Farnell sells them for € 141 (farnall, so that's without VAT) , I'd guess if you can get it for € 90 it's a good deal
20:13:35 <hsn> T3sl4 aah ,, ok understood thanks
20:25:29 Join: Lemon ([email protected]) to #EEVblog
20:25:41 <Lemon> ayeee
20:27:45 <AndrevS> hello!
20:28:11 <Lemon> how its poppin !
20:29:38 Join: hsn93 ([email protected]) to #EEVblog
20:30:09 <AndrevS> I'm watching the new video about the PSU.
20:30:32 Join: Guest|56216 ([email protected]) to #EEVblog
20:30:46 Quit: Guest|56216 ([email protected]) Quit: http://www.kiwiirc.com/ - A hand crafted IRC client
20:31:00 <Lemon> the 800w one ? im about to watch it haha
20:31:12 <AndrevS> yeah
20:31:41 <AndrevS> watch the 2nd channel unboxing video first ;)
20:32:08 <Lemon> hmmmm ok :P lets do that, today im going to open my tds 540 and re-glue a few heatsinks that fell yesterday
20:32:56 Quit: hsn ([email protected]) Ping timeout: 121 seconds
20:37:13 <EEVBlog> New EEVBlog Retweet: Caitlin Long 🔑: 1/ HOW TO UNDERSTAND WHAT'S GOING ON IN FINANCIAL MKTS. Western world built up a debt bubble of stunning proportions over past ~50yrs. It's deflating now, just as it tried to do in 2008, 2001, 1997, 1994, 1987, 1981 & 1974. Each time, tho, there was enuf balance sheet capacity...
20:39:46 <Lemon> those damned touch screensa
20:40:02 <Lemon> a lab supply is the last thing where I want to spend time fiddling around
20:40:31 <Lemon> thats why I Love my old linears, two knobs, some got a magnfier button, thats all
20:40:53 Join: hsn ([email protected]) to #EEVblog
20:41:28 <Lemon> and even for things more complicated like an arb gen, the siglent 1032x got it rght, no touchscreen needed
20:41:43 <Lemon> Ididnt buy the rigol counterpart for this reason, amongst others
20:42:42 <AndrevS> I don't like touch screens either. I don't even use a smart phone as my primary phone.
20:43:14 <Lemon> hah nice ! I wish I could have my old BB bold, but sadly he isnt in good shape lol
20:43:26 <Lemon> but yeah this supply looks nice, minus the UI that looks like an android tablet
20:43:55 Quit: hsn93 ([email protected]) Ping timeout: 121 seconds
20:44:21 <AndrevS> I've got an old Nokia 6300. The non-smart Nokias they sell these days are crap.
20:45:01 <Lemon> a good ol boi !
20:45:05 <AndrevS> I used to have this Sony Ericsson Xperia Mini Pro, but for a smart phone that's too old to be usable.
20:45:14 <AndrevS> But yeah... that was a phone with a nice keyboard
20:46:05 <Lemon> I just use a iphone se those days, it works well. I basically rarely use it, just for sms, some rare calls, and occasiionnal web surfing, thats all
20:47:39 <AndrevS> I've got some cheap android, a wiko, laying around, to run some apps, but there is no sim card in there.
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20:53:56 <Lemon> ok so this psu got a lotta feature
20:54:06 <Lemon> the ui is meh, im not a fan but its not that bad
20:54:24 <Lemon> the external build looks meh too, insides are quality im sure
20:54:26 Quit: hsn ([email protected]) Ping timeout: 121 seconds
20:54:29 <Lemon> but 5k ?
20:58:21 <EEVBlog> New EEVBlog Tweet: Nothing to see here. Repo Market Goes NUCLEAR! Fed Unleashes Bazookas. How Will It Affect YOU? https://t.co/O4wInpSS5u
21:29:27 Quit: hsn93 ([email protected]) Ping timeout: 121 seconds
21:36:27 Join: Ysjoelfir ([email protected]) to #EEVblog
21:36:27 Quit: Ysjoelfir ([email protected]) Changing hosts
21:36:33 <Ysjoelfir> moin
21:36:42 <Lemon> hey ! I was about to say what new score I just did :>
21:36:52 <Lemon> how u doin ?
21:37:21 <Ysjoelfir> my finger geels rather good today :) it looks nasty though.
21:37:27 <Ysjoelfir> so you are happy because of.... new stuff? :D
21:37:39 <Ysjoelfir> did yopu finally get a dipmeter and a tek502A?
21:38:43 <Lemon> yes ! small stuff but useful : 3 attenuators, 6, 10 and 20db, 2 50 ohms loads, one male/female and a cap, a T, and a bnc/female banana adapter for 20 euros all with shipping ! most of it is the radiall brand, its ok from what I read right ?
21:39:38 <Lemon> the dude who sold me the scope made a good point saying I need loads with my generators
21:39:47 <Lemon> and its great to have some attenuators, adapters aswell
21:43:12 Join: hsn93 ([email protected]) to #EEVblog
21:43:59 <hsn93> Trevor noah really hates trump
21:44:00 <hsn93> https://www.youtube.com/watch?v=BWO6i8cH8SA
21:45:33 <Ysjoelfir> I have no idea if its good - not my frequency spectrum :D but to have that is usually pretty good
21:45:50 <Lemon> yeah I see that radiall is pretty popular
21:46:14 <Lemon> I cant wait to get my arb gen :>
21:46:25 <Lemon> my first piece of gear thats new !
21:46:33 <Lemon> well with the little fluke and lcr meter, but those doesnt count :P
21:46:36 <Lemon> also the most expensive !
21:46:51 <Ysjoelfir> meh. Must I watch Mr. Carrot now, hsn? :D Or can you just quickly tell what has happened?
21:47:22 <Ysjoelfir> Lemon - I have exactly two pieces of equipment that is new on my workbench^^
21:47:29 <Lemon> the rigol
21:47:31 <Lemon> annnnnnd ?
21:47:49 <Ysjoelfir> exactly. the rigol and the Iiyama touchscreen monitor for my workshop PC
21:48:01 <Lemon> ho yeah I can count monitors too
21:48:10 <Lemon> the tds 540 looks new really
21:48:15 <Lemon> its in such a good shape
21:50:10 <Ysjoelfir> I am happy about my new 502A :) it's the most decent looking one I have, yet. So I will probably restore that one and keep it on my desk
21:50:24 <Lemon> its a fun thing yeah :>
21:50:39 <Lemon> my 2245 is in really good shape too ! I'd like one day to get a 2645B :>
21:50:40 <Ysjoelfir> But first I have to go through my assortment of transformers. I have way to many
21:50:56 <Lemon> ho I still need to build a box for the variac
21:51:00 <Lemon> and find two analog meters
21:51:09 <Lemon> one 0-300v or so and 0-3 amps
21:51:20 <Ysjoelfir> And I just noticed that one of the probes that came with the two scopes is a realy strange one.
21:51:32 <Ysjoelfir> don't forget that those must be moving.... magnet ones IIRC. wait
21:52:35 <Lemon> hmm I dont understand ?
21:52:41 <Lemon> moving like, analog meters ? :>
21:52:44 <Ysjoelfir> yes, moving magnet
21:52:52 <Ysjoelfir> yes, I would choose analog ones.
21:52:57 <Lemon> yeah but
21:53:03 <Lemon> I mean all analog meters move ?
21:53:03 <Ysjoelfir> and you need moving magnet, not moving coil
21:53:07 <Lemon> ha !
21:53:09 <Lemon> why that ?
21:53:19 <Ysjoelfir> because moving coil meters can't measure AC
21:53:28 <Lemon> hooooo righhhhtttt
21:53:30 <Lemon> thanks !
21:55:37 <Lemon> id like to find a plugin for the hp counter
21:55:46 <Lemon> the 18ghz onewould be dope :>
21:56:12 <Lemon> and discover the needed voltage for that resistor bridge !
21:59:25 <T3sl4> https://imgur.com/gallery/JD6DffX
22:02:16 Join: Lemon_ ([email protected]) to #EEVblog
22:04:31 <Ysjoelfir> sweet T3sl4
22:04:59 Quit: Lemon ([email protected]) Ping timeout: 121 seconds
22:05:01 Nick: Lemon_ is now known as Lemon
22:05:09 <Lemon> wtf seriously
22:05:11 <hsn93> https://www.youtube.com/watch?v=--Oly6yY5To << 8 Meat Gadgets put to the Test
22:05:48 <hsn93> i wish i was the cat
22:07:50 <Ysjoelfir> hm? did it kick you again?
22:07:56 <Lemon> yeah
22:08:02 <Lemon> how btw
22:08:12 <Lemon> do you have any ideas, on how I could find the voltage for that bridge resistor ?
22:10:20 <Lemon> because it looks nice, and its well made
22:10:27 <Lemon> that would be fun to make it work
22:11:07 <Ysjoelfir> well, iirc there is some sort of IC in it. potentially an opamp. look for a datasheet and trace the circuit, then it could be getting clear
22:11:42 <Lemon> hmmmm ok im going to try that
22:11:56 <Lemon> I cant wait to get the siglent gen !
22:12:07 <Lemon> so much fun in perspective with it :> and much to learn !
22:18:07 <hsn93> and im still waiting for the SDR :>
22:18:39 <Ysjoelfir> is it still not there?^^
22:19:21 <hsn93> no .. i got (near field probes) and one sma-female sma-male cable
22:19:42 <Lemon> https://www.ebay.fr/itm/Sell-Tektronix-P6139A-500Mhz-10M-8-0pF-10x-Passive-Sonde/164116756405?hash=item26361ef7b5:g:ny4AAOSwsWpeYg9H&autorefresh=true I'll probably get this one
22:19:49 <Lemon> tried an offer but got no response
22:19:58 <Ysjoelfir> I just started my 502A my uncle brought me. Had to wipe down that small shitty hameg first, but after that I could look at the gorgeous, ultra sharp mildly persistent CRT with the beautiful (either red or white) illuminated graticule
22:20:12 <hsn93> oooow , active probe ?
22:20:19 <Lemon> nope passive :>
22:20:23 <Ysjoelfir> I got a passive x1 probe to the 502A XD
22:20:24 <Lemon> I already have one of those
22:20:38 <Lemon> he is selling a 1ghz active probe
22:20:41 <Lemon> I was tempted but well
22:20:50 <Lemon> I dont think I'll benefit from it
22:21:14 <Lemon> those 500Mhz ones are the exact model that came with the tds 540
22:21:25 <Lemon> one day I'll have to recap it
22:27:51 <T3sl4> Halcyon: "bitch i'm fabulous" https://i.redd.it/u71conomyyn41.jpg
22:44:25 <Ysjoelfir> I think about getting an generator. one of those fuel to current things.
22:44:44 <Ysjoelfir> but it may be a bad moment to buy one as every0ne is freaking aut about corona
22:44:58 <Ysjoelfir> like "oh no, we will die, we wont have power, we wont have water, waaaaah"
22:45:04 <Ysjoelfir> so lets buy ALL the generators!
22:45:22 <Ysjoelfir> and I am like: I want to polish my car... I need a generator
22:45:24 <Lemon> yes but after the virus, many will sell some used like new
22:46:46 <Lemon> if I get another analog scope, that would be this one https://www.ebay.fr/itm/TEKTRONIX-2465B-400MHz-ANALOG-4-CHANNEL-OSCILLOSCOPE-with-manual-Manual/153673758915?hash=item23c7ab78c3:g:FcYAAOSwVTpdmY5k
22:46:47 <Ysjoelfir> I have heard some people say that there wont be any after the virus
22:46:51 <Ysjoelfir> the world will go extinct!
22:46:54 <Lemon> well not this one in particular, but this model
22:47:14 <Lemon> or better a 2467B
22:47:22 <Lemon> as it can capture signals
22:49:12 <Lemon> and also a 2225, 50 mhz scope, but it got a nice thing, it goes down to 500 micro volts per div !
22:51:53 <Ysjoelfir> the 502A can also capture signals, if you use option Tektronix C-30
22:52:03 <Ysjoelfir> or was it C-12? not sure
22:52:06 <Lemon> hehe neat !
22:52:31 <Lemon> but the 2467B is really impressive, 400mhz !
22:52:33 <Ysjoelfir> yeah, I think it was option C-12
22:52:39 <Ysjoelfir> https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/C-12.html
22:53:24 <Lemon> nice !
22:53:31 <Lemon> https://www.leboncoin.fr/materiel_medical/1734706437.htm/ strange boi
22:54:17 <Ysjoelfir> iiih
22:54:20 <Ysjoelfir> its a yokogawa
22:54:46 <Lemon> https://www.leboncoin.fr/bricolage/1702912951.htm/
22:54:48 <Ysjoelfir> one does not buy stuff from yokogawa! at least not when working for my employer xD
22:54:49 <Lemon> nice collectible
22:57:53 <Lemon> im a bit sad about the fluke, and the 20 euros 300Mhz probe
22:57:59 <Lemon> people suck really
23:02:23 <Lemon> out of 4 things I bought using the built in paiement system (which works perfectly), im still waiting an answer from two people, and two others said 'I want a cheque blabla'
23:02:34 <Ysjoelfir> lol
23:02:40 <Lemon> thats tiring
23:02:54 <Ysjoelfir> you french guys are strange :D
23:03:14 <Lemon> frenchies are dumb with internet
23:03:17 <Lemon> and computers, in general
23:03:20 <Lemon> hey look https://www.leboncoin.fr/bricolage/1759249889.htm/
23:03:22 <Lemon> its cute !
23:03:41 <Ysjoelfir> it is
23:03:50 <Lemon> arghhh I want it now
23:03:58 <Lemon> 13 euros of shipping
23:04:55 <Lemon> you never have enough supplies
23:05:47 <Lemon> I still want a 1kv/200ma
23:06:52 <Lemon> hoooooo the same that I bought recently, but in 18v and half the current https://www.leboncoin.fr/equipements_industriels/1532509174.htm/
23:12:19 <Lemon> alright im seeing a friend today
23:12:24 <Lemon> see you tonight !
23:14:38 Quit: Lemon ([email protected]) EOF from client
23:25:44 Join: hsn ([email protected]) to #EEVblog
23:52:36 <hsn93> tc
23:58:15 Quit: hsn ([email protected]) Changing hosts
23:58:15 Join: hsn ([email protected]) to #EEVblog
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