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-   -   Pio russian capacitor K42-11...is good ? (http://www.diyaudio.com/forums/tubes-valves/176081-pio-russian-capacitor-k42-11-good.html)

aldovan 26th October 2010 07:12 PM

Pio russian capacitor K42-11...is good ?
 
This K42-11 is really a paper in oil capacitor ?
Work fine in audio coupling or the K40Y-9 is best ? Any experience ?

Thanks,

Aldovan

lem8r 26th October 2010 07:45 PM

K42-11 is metallized paper capacitor

piano3 26th October 2010 08:20 PM

K42Y-2 are metallized paper in oil but K40Y-9 are metal foil,paper in oil. Both are excellent(if you like PIO;not everyone does)and beautifully constructed, although,in theory, the K40Y-9(much bigger) should be better.

piano3 26th October 2010 08:54 PM

The different suffix,11, may mean it is a variant for special purpose,for instance,high frequency use. I am sure some member of the forum will know this.

Actually, I have just looked at the ones you mean(which I have not tried) and they seem to be large value lower voltage without the usual glass sealed steel case.

I did not see post number 2- yes,probably no oil!

Wavebourn 26th October 2010 09:32 PM

K40 are better for amps with no feedback around caps applied. With feedback I sense no difference.

aldovan 27th October 2010 01:33 AM

K42Y-2 is a PIO capacitor ?
 
Friends

Some time ago I got a lot of K42Y-2 tubes in ebay.
I make a comparation with a old ( 60s) brazilian made PIO capacitor( the brand make this oil capacitor until today here) and the brazilian sound best...this K42Y-2 is really PIO or for the russians sellers PIO is Plastic In Oil ?
In ebay have a confusion and few information about the material used in this russian capacitors...

Aldovan

lem8r 27th October 2010 06:15 AM

Here is some info from Russian book:

Low voltage, low frequency caps:
Paper: КБГ (КБГ-И, КБГ-МН, КБГ-МП), ОКБГ (ОКБГ-И, ОКБГ-МН, ОКБГ-МП. ОКБГ-М), БГТ, К40П-2, К40У-5, К40У-9, К40-11, БМ-2, БМТ-2
Metallized paper: МБГ (МБГП, МБГЦ), МБГИ, МБГН, МБГО, МБГТ, МБГЧ (МБГЧ-1, МБГЧ-2), МБМ, КМБП, К42У-2, К42П-5, К42Ч-6, К42-4, К42-8, К42-11, К42-18, К42-19
That's all I can find

Wavebourn 27th October 2010 04:30 PM

Here you go: translated Russian table about digits and designations.

Google Translate

kevinkr 27th October 2010 04:35 PM

Quote:

Originally Posted by Wavebourn (Post 2345529)
Here you go: translated Russian table about digits and designations.

Google Translate

Very useful information. :D

I'm actually surprised at how well google translate worked on this page - it's completely readable.. :D

Wavebourn 27th October 2010 04:43 PM

Quote:

Originally Posted by kevinkr (Post 2345534)
Very useful information. :D

I'm actually surprised at how well google translate worked on this page - it's completely readable.. :D

Except 76, it is lacquer-film.

Google translate gets better and better, thanks to many contributors. I myself contribute almost every time I see incorrect translation. I wish my English would improve so fast. ;)


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