Russian oil caps ?

Tomatito · 17th May 2003, 10:11 AM

Hi all,

I would like to tap into the expertise of the members of this forum, not being all that knowledgeable myself.

In searching for a couple of paper in oil caps I came across the offerings of mr. Tony Welsh esq.
What I would like to know is, are these russian oil caps he's selling just as good as / much better than / wouldn't use them if they gave 'em away for free compared to the "established" caps by Cornell D., Sangamo, Aerovos, etc.?

Any help would be greatly appreciated.

Martin

dhaen · 17th May 2003, 10:37 AM

Martin,

I've used the Russian capacitors from Tony Welsh. They seem fine to me. I can't compare them with "boutique caps" as I don't use them.
The finish is dipped paint (which tends to flake), and is probably less atractive than many western types, but perfectly adequate for under-chassis work.
Be aware that some are rated at AC voltage, and others at DC.
The AC caps should be useable up to 1.4 x the ratings with DC, though presonally I would treat that as a "surge rating" - perhaps during warm-up time etc.

Cheers,

Tomatito · 17th May 2003, 07:05 PM

Thanks John, the ones I saw were rated 630 V, so it should be ok either way.

cheers

Martin

analog_sa · 18th May 2003, 08:41 AM

Just curious: why use oil caps at all?

Tomatito · 18th May 2003, 01:39 PM

Quote:

Originally posted by analog_sa
Just curious: why use oil caps at all?

Because they're in the schematics and I'm not experienced enough to start fiddling with substitutes.

analog_sa · 18th May 2003, 05:53 PM

The type of dielectric is only a question of taste; don't be afraid to experiment. Oil caps in my experience have the sonic transparency of a wet blanket although apparently many people like them.

cheers

peter

fdegrove · 18th May 2003, 07:51 PM

Hi,

Peter,

I think Martin uses them as PSU caps.
Still wet and oily but not so blanketty....

Ciao,

Tomatito · 18th May 2003, 08:05 PM

Ah, yes, sorry, the ones I was talking about are 8 uF / 630 V and definitely for the PSU

EC8010 · 18th May 2003, 11:34 PM

It's all about where you use things. I have amplifiers with polypropylene power supply capacitors, and others with electrolytics. Can you give a few details about your proposed application?

fdegrove · 18th May 2003, 11:42 PM

Hi,

Nothing wrong with it...just some app missunderstandings.

And yes, as usual...horsies for coursies,

Know thy component and thy'll know thyself?

Cheers,

17th May 2003, 10:11 AM	#1
Tomatito diyAudio Member Join Date: Oct 2002 Location: Amsterdam	Russian oil caps ? Hi all, I would like to tap into the expertise of the members of this forum, not being all that knowledgeable myself. In searching for a couple of paper in oil caps I came across the offerings of mr. Tony Welsh esq. What I would like to know is, are these russian oil caps he's selling just as good as / much better than / wouldn't use them if they gave 'em away for free compared to the "established" caps by Cornell D., Sangamo, Aerovos, etc.? Any help would be greatly appreciated. Martin

18th May 2003, 07:51 PM	#7
fdegrove diyAudio Senior Member Join Date: Aug 2002 Location: Belgium	OIL. Hi, Peter, I think Martin uses them as PSU caps. Still wet and oily but not so blanketty.... Ciao, __________________ Frank

18th May 2003, 08:05 PM	#8
Tomatito diyAudio Member Join Date: Oct 2002 Location: Amsterdam	olie Ah, yes, sorry, the ones I was talking about are 8 uF / 630 V and definitely for the PSU

18th May 2003, 11:34 PM	#9
EC8010 diyAudio Moderator Join Date: Jan 2003 Location: Near London. UK	More details? It's all about where you use things. I have amplifiers with polypropylene power supply capacitors, and others with electrolytics. Can you give a few details about your proposed application? __________________ The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...

18th May 2003, 11:42 PM	#10
fdegrove diyAudio Senior Member Join Date: Aug 2002 Location: Belgium	Spijkers Op Laag Water... Hi, Nothing wrong with it...just some app missunderstandings. And yes, as usual...horsies for coursies, Know thy component and thy'll know thyself? Cheers, __________________ Frank

17th May 2003, 10:37 AM	#2
dhaen diyAudio Moderator Emeritus Join Date: Jun 2002 Location: U.K.	Martin, I've used the Russian capacitors from Tony Welsh. They seem fine to me. I can't compare them with "boutique caps" as I don't use them. The finish is dipped paint (which tends to flake), and is probably less atractive than many western types, but perfectly adequate for under-chassis work. Be aware that some are rated at AC voltage, and others at DC. The AC caps should be useable up to 1.4 x the ratings with DC, though presonally I would treat that as a "surge rating" - perhaps during warm-up time etc. Cheers,

17th May 2003, 07:05 PM	#3
Tomatito diyAudio Member Join Date: Oct 2002 Location: Amsterdam	Thanks John, the ones I saw were rated 630 V, so it should be ok either way. cheers Martin

18th May 2003, 08:41 AM	#4
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	Just curious: why use oil caps at all?

18th May 2003, 05:53 PM	#6
analog_sa diyAudio Member Join Date: Aug 2002 Location: Sofia	The type of dielectric is only a question of taste; don't be afraid to experiment. Oil caps in my experience have the sonic transparency of a wet blanket although apparently many people like them. cheers peter

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