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Old 22nd May 2012, 12:31 PM   #1
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Default this is EL34 tube of what model?

Hi all,
I'm totally noob to tube. I purchased dynaco st-70 rebuilt by will vincent.
I have 1 tube probably russian el34 not lighted up at all.
Could you please check my attached file and tell me this tube is of what model?
Ex: svetlana or mullard or something?
thank you very much
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File Type: jpg IMG_20120521_094839.jpg (33.2 KB, 221 views)
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Old 22nd May 2012, 03:11 PM   #2
kevinkr is offline kevinkr  United States
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Looks like some rather old Chinese (Shuguang made) EL34 I have.. These particular ones have proved unreliable.
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Old 22nd May 2012, 03:18 PM   #3
DF96 is offline DF96  England
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The very rounded end to the glass suggests modern manufacture. The rather uneven anode spot welds says "China" to me.
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Old 22nd May 2012, 05:52 PM   #4
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The round-top envelope, the spurred micas, single-halo getter ring, big flag grid coolers, anode apertures and base are all very like the JJ EL34.

The marking does burn off these, when overheated.

That picture shows a worn-out example!
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File Type: jpg EL34bildJJ.jpg (18.6 KB, 174 views)
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Old 23rd May 2012, 12:35 AM   #5
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Quote:
Originally Posted by Rod Coleman View Post
The round-top envelope, the spurred micas, single-halo getter ring, big flag grid coolers, anode apertures and base are all very like the JJ EL34.

The marking does burn off these, when overheated.

That picture shows a worn-out example!
I'm sorry my english is bad. You meaned mine looks like JJ EL34?
Thank you
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Old 23rd May 2012, 08:49 AM   #6
DF96 is offline DF96  England
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Rod thinks it is a JJ. I think it is probably Chinese.
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Old 23rd May 2012, 10:18 AM   #7
работник
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Quote:
Originally Posted by vuthecuongjapan View Post
I'm sorry my english is bad. You meaned mine looks like JJ EL34?
Thank you
Yes.... I think it looks like JJ EL34.



I am sure that Your EL34 is **NOT** Russian - Svetlana or ElectroHarmonix (=Reflektor).

There are many Chinese versions - maybe it is Chinese.... but JJ EL34 is my best guess.
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Old 23rd May 2012, 11:50 AM   #8
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Thank all of you very much
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Old 28th May 2012, 09:03 PM   #9
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Smile JJ

this is slovak tube

JJ-Electronic - Vacuum tubes, Capacitors, Amplifiers - Home

formerly TESLA
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