How good or bad are the russian teflon caps - diyAudio
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Old 22nd January 2004, 08:25 PM   #1
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Question How good or bad are the russian teflon caps

Hi,

that stuff on ebay, how good is it ? Any experiences ?

There are two kinds, one with round leads, these are steel
and one with flat leads, steel also ?

Bernhard
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Old 22nd January 2004, 08:26 PM   #2
Magura is offline Magura  Denmark
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A pic?? or even better... a link??


Cheers

Magura
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Old 22nd January 2004, 09:04 PM   #3
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The units I considered at some point were magnetic. If your units are the same one should expect any benefit from the teflon to be completely destroyed due to this. There is also the matter of construction technique which would likely limit the data-sheet performance as well.

I have not tried them but decided it was not worth pursuing.

Petter
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Old 22nd January 2004, 09:32 PM   #4
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http://cgi.ebay.com/ws/eBayISAPI.dll...&category=4662
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Old 22nd January 2004, 09:49 PM   #5
Magura is offline Magura  Denmark
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If used in filters they sure are good. I have bought loads of EX russian military stuff, its state of the art.

A lot of it is acually better than what we see in the west, since a lot of it is made during the soviet period....no expense saved.


Magura
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Old 22nd January 2004, 09:53 PM   #6
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Quote:
The units I considered at some point were magnetic. If your units are the same one should expect any benefit from the teflon to be completely destroyed due to this. There is also the matter of construction technique which would likely limit the data-sheet performance as well.
The proof of the pudding is in the eating!

I have used them in 2 amps now. They are very very good...maybe not as good as non magnetic NASA stuff...but hey at this price I cant complain. Most on Audio Asylum agreed that they are beautiful sounding...Doug Flynn was underwhelmed...at one stage...maybe he likes them now that they have run in ...when he reported he wanted to put his paper in oil back in...

But like I said most were very happy. Gary Pimm and Kurt Strain to name a few...but then again ..YOU have to like them...at the price they go for...go get em.

Cheers,
BAs

Here some measurements by Douglas (Sector7G) dunno what the figures are.....

O...and KWTUBES's Gintaras is a super guy!!
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Old 22nd January 2004, 10:37 PM   #7
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Quote:
Originally posted by Magura
If used in filters they sure are good. I have bought loads of EX russian military stuff, its state of the art.
Good in filters, and elsewhere ???

The only russian caps I ever bought was 100 pieces of silver mica 10nF 0,3% hermetically sealed in metal/ceramic case and not magnetic. Did not try them yet, shame on me...

Now I wonder which ones are better, micas or teflons, also I have west micas, nonmagnetic.

I want to use them in my new active xover, and values are fitting...

By the way, TO3 transistors are magnetic, most of them, and tubes and transformers...


Bernhard
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Old 25th January 2004, 05:22 AM   #8
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Default another question

when using caps,

example: two 1000 uF caps in serie...
does that give 2000 uF ?

What happens with the volt rating for example 1000 uF 50 volts ?


Jean-Pierre
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Old 25th January 2004, 09:03 AM   #9
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n 1000F caps in series gives 1000F / n, Voltage x n.

parallel 1000F x n, Voltage x 1.
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Old 25th January 2004, 09:51 AM   #10
Raj1 is offline Raj1  United Kingdom
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Hi,


I've got the russian teflon's 500v 0.1uf, they do sound pretty good.. If you comapre to say a 0.1 uf 250v polypropylene, the bass is way deeper and I think you get a fuller sound. The pins are silver coated steel/metal. Only trouble is that they are large so you have to dress leads to use them, and sometimes the length of extra lead you have to use raises the question of performance versus inductance (extra wire length and an extra solder joint too). Still I've used them across cathode res on their own (yep 0.1uf only). To my ears they're quite neutral providing equivalent bass of a larger film cap, with all the other benefits too.

Thanks
Raja
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