Pio russian capacitor K42-11...is good ?

[aldovan]

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]

K42-11 is metallized paper capacitor

[piano3]

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]

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]

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

[aldovan]

Friends

Some time ago I got a lot of K42Y-2 tubes in ebay.
I make a comparation with a old ( 60´s) 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]

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]

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

Google Translate

[kevinkr]

Originally Posted by Wavebourn

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

Google Translate

Very useful information.

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

[Wavebourn]

Originally Posted by kevinkr

Very useful information.

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

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.