Does anyone know the specs for this Chinese pentode - diyAudio
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Old 5th February 2012, 05:02 PM   #1
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Default Does anyone know the specs for this Chinese pentode

The tube is an 8 pin Octal labeled 6*4 where the asterisk looks like an X and an I superimposed. It has a 6BD base and a T9 envelope. The only thing I find in a search for those parameters is a 1SA6GT.
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Old 5th February 2012, 05:26 PM   #2
DHT112A is offline DHT112A  United States
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It is a 6ZH4.

U.S. equivalent would be a 6AC7

6Zh4 | Tubes Information

Last edited by DHT112A; 5th February 2012 at 05:32 PM.
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Old 5th February 2012, 06:34 PM   #3
Bone is offline Bone  United Kingdom
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This (6ZH4) is more usually written 6J4.
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Old 5th February 2012, 07:00 PM   #4
DHT112A is offline DHT112A  United States
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The 6J4 is a 7 pin triode unless you mean 6J4P

Last edited by DHT112A; 5th February 2012 at 07:03 PM.
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Old 5th February 2012, 07:01 PM   #5
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Thanks guys.
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Old 5th February 2012, 07:14 PM   #6
Mikha is offline Mikha  Russian Federation
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Diagrams:

''Исток2''. Радиолампы - почтой. Параметры и характеристики 6Ж4
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Old 5th February 2012, 07:29 PM   #7
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Quote:
Originally Posted by DHT112A View Post
The 6J4 is a 7 pin triode unless you mean 6J4P
I dont know about this example but the Chinese are known to copy Russian tubes and they drop the "P". For example the Russian 6N1P is the 6N1 in China.
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Old 6th February 2012, 02:35 PM   #8
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Yes that's correct mace1337. As I look now in just the right like I can just barely make out the 6J4P on one of the envelopes. I note that when one presses the google translate button on the characteristics page Mikha posted, the Russian character I had described as an X and I superimposed translates to a ZH as DHT112A had posted. Thanks for the help.
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