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Old 02-08-2022, 12:28 PM   #21
stj
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Default Re: Sacon FZ revival experiment

you take the readings as a whole.
if capacitance and esr look o.k. then v-los you think about,
but it's more common with high v-loss to also have high capacitance - then you know the cap is fucked.
best i'v seen was 3300uf caps reading over 9000
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Old 02-18-2022, 05:47 PM   #22
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Default Re: Sacon FZ revival experiment

Quote:
Originally Posted by stj View Post
you take the readings as a whole.
if capacitance and esr look o.k. then v-los you think about,


Quote:
Originally Posted by stj View Post
best i'v seen was 3300uf caps reading over 9000
Well, these are probably good contenders:

Rubycon MFZ 6.3V 2700 uF reading ~6300 uF


And Sanyo WF 6.3V 1500 uF reading over 4000 uF
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Old 02-18-2022, 05:58 PM   #23
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Default Re: Sacon FZ revival experiment

an un-molested GM328A!!!
you need a rotary encoder and a faster crystal and a better regulator
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Old 02-23-2022, 11:10 AM   #24
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Default Re: Sacon FZ revival experiment

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Originally Posted by eccerr0r View Post
The v_loss
video about vloss - it is very inaccurate
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Old 03-13-2022, 07:21 PM   #25
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Default Re: Sacon FZ revival experiment

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Nice video!
I like that they guy is showing actual V_loss with higher voltages (26V in his video, if I understood correctly) and over a long period of time, therefore being able to get a more accurate estimate. And also the theory of how he is calculating it! Very good and informative.

However, in the case of electrolytic capacitors, I think we also have to remember that -used- capacitors will become pre-formed to a certain voltage after being used in a circuit for a very long time - e.g. 6.3V cap used on a circuit that handles only 2.5V will make the cap "accept" up to 2.5V easily, but any higher voltage will experience a much greater V_loss. Thus, for electrolytic capacitors at least, V_loss can be very non-linear depending on the test voltage used. On that note, if these cheap testers show high V_loss on a cap, chances are that it's in pretty bad condition already. I say "chances", because sometime I have seen caps fool the meter to display high V_loss (or a few polymer caps, in particular) without there being anything wrong with these caps. Perhaps someone should make V_loss a separate function on these cheap testers that measure it over a longer period of time and with a higher voltage applied onto the cap, just like in the video - then V_loss could become quite accurate, possibly.

Quote:
Originally Posted by stj View Post
an un-molested GM328A!!!
you need a rotary encoder and a faster crystal and a better regulator
Eh, maybe another day. Too many projects to thinker with and I use this tester a lot... plus, it still works. So it always goes to the back of the queue. Perhaps if I get a 2nd one of these, I'll try it (and I think I might try to get one... eventually.)

Last edited by momaka; 03-13-2022 at 07:24 PM..
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Old 03-13-2022, 09:15 PM   #26
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Default Re: Sacon FZ revival experiment

It's over 9000!

Ugh want something to read not watch...
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Old 03-26-2022, 09:42 PM   #27
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Default Re: Sacon FZ revival experiment

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It's over 9000!

Ugh want something to read not watch...
So put on subtitles for the video?
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Old 03-27-2022, 09:37 AM   #28
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Default Re: Sacon FZ revival experiment

Transcript with finger pointing? Or do I still have to wait for the whole thing to be played?
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