Bottlehead Forum

General Category => Technical topics => Topic started by: Thoburn on July 17, 2012, 03:21:38 PM

Title: Russian Cap Identification
Post by: Thoburn on July 17, 2012, 03:21:38 PM

I was given a couple capacitors that are suppose to be Russian teflon. They are about an inch in diameter and about 2 inches long. The case appears to be aluminum and the ends appear to be white plastic or teflon. The leads appear to be silver or silver plated. The only writing looks like the following:

(a schematic symbol for a capacitor and then a diamond shape)
(a greek symbol)T-3
OilMK(a greek symbol)
+- 5%(a delta symbol)
600B
9201

and the other one:


(a schematic symbol for a capacitor and then a diamond shape)
(a greek symbol)T-3
OilMK(a greek symbol)
+- 5%(a delta symbol)
600B
9106

Does anybody recognize these cap? If so, what are its voltage and uF?

Thanks !!!

Title: Re: Russian Cap Identification
Post by: Grainger49 on July 18, 2012, 12:48:07 AM

Sounds like KK Teflons.  They are 5% tolerance and 600 Volts.  Russian alphabet has no V.

I would, however, expect an "FT-?" on them for Teflon caps.  If the Greek symbol was Phi, Ф, that is the F in "FT-3".

Here is a link:

http://www.diytube.com/phpBB2/viewtopic.php?t=898

And in Russian (my brother speaks Russian):

http://sovietsouvenirs.com/FT.htm

Title: Re: Russian Cap Identification
Post by: Thoburn on July 18, 2012, 03:46:28 PM

Quote from: Grainger49 on July 18, 2012, 12:48:07 AM

If the Greek symbol was Phi, Ф, that is the F in "FT-3".

That's it. ФT-3

Title: Re: Russian Cap Identification
Post by: Thoburn on July 21, 2012, 12:48:28 PM

After much head scratching and reading through the web pages listed above (and working with a magnifier) I think this is what I have:

ФT-3
0,1 MKФ
+- 5%
600B

Which means large military grade teflon 0.1 uF plus/minus 5% and 600 volts. I have two. They are about the size of a D-cell battery. Now I have to figure out what I will use them for.

There is a number at the bottom of the label. One is 9106 and the other is 9201. I have to assume that the number is a batch id of some kind.

Title: Re: Russian Cap Identification
Post by: Grainger49 on July 21, 2012, 01:27:52 PM

Yup, that is it.

A 0.1uF makes a good interstage capacitor in a Paramount 300B or Stereomour.  It could be used for a bypass in anything that needs 600V caps.

Title: Re: Russian Cap Identification
Post by: galyons on July 22, 2012, 01:55:55 PM

Quote from: Thoburn on July 21, 2012, 12:48:28 PM

There is a number at the bottom of the label. One is 9106 and the other is 9201. I have to assume that the number is a batch id of some kind.

Date of manufacture... June 1991 and January 1992.  Great caps, BTW!!!

Cheers,
Geary

Title: Re: Russian Cap Identification
Post by: Grainger49 on July 23, 2012, 03:23:05 AM

Ah, Ha! I might have known that but forgot it.  Thanks for the information!

Title: Re: Russian Cap Identification
Post by: Thoburn on July 23, 2012, 03:23:24 PM

Quote from: galyons on July 22, 2012, 01:55:55 PM

Date of manufacture... June 1991 and January 1992.  Great caps, BTW!!!
Cheers,
Geary

Cool! Thanks for the info. I have Jupiter HT caps in my Stereomour. There is not much room, but maybe I could stuff the KKs in there somewhere. I will have to go read up on the cap burn in threads.