Anyway, I started to measure them all, and every single one, in both
>channels, is either high ESR or completely open. Over 20 caps in all.
Most likely they are all counterfeit parts. You can sometimes recognize them by various differences from the real parts, but what I'm seeing is that the counterfeits are getting closer to the real thing.
My collection:
** Utter horse manure.
... Phil
Could they date to the "stolen partial electrolyte formula" era? My recollection is that caps made with the defective electrolyte tend to start going gnaester-upwards after a few thousand hours with power applied... I don't recall heat being a requirement for the failure to occur.
"Dave Platt"
** Q. Why was that formula stolen ??A. Because it was the secret to making tiny, high value and LOW ESR electros for use in PC mobos and SMPS.
Not for low value, regular electros in audio.
..... Phil
Ha, I like the green "Rifeking" branded ones.
giving
are
all
waveform
What date? All same make ?
Fake Panasonic caps: (Registration required to view photos).
Fake Rubycon:
Nichicon:
The Japanese manufacturers parts are being cloned by some Chinese manufacturers. I've seen my share of both flavors of fake parts, mostly bought on eBay but also extracted from repairs.
General interest:
Incidentally, it's not just capacitors. Lubricants: Lamps: Misc:
"Jeff Liebermann = IDIOT "
** FFS you TENTH WITTED JERK OFF !!!Fake caps exist, but AD's are NOT likely to be examples.
The values are too low, for a start.
... Phil
Me too. However, it's a real company: Still, you might want to compare photos of the electrolytics on the data sheets with those you extracted.
Overheating will certainly boil off the electrolyte. That may explain the massive capacitor failures. See any evidence of venting on the electrolytics? Look at the base as well as the top.
When you get it working, give it a burn in test. If the original caps were any good when new, your replacements will probably have a similar lifetime.
Nicely done. Got time for an accelerated burn-in test?
it looks ike "eurocap" just imports stuff from the "far east" like a bunch of other "brands".
"Jeff Liebermann = OLD FOOL "
** The web page says it has not been updated for almost six years.Methinks they are caputski.
.... Phil
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