VT52: are the triode and pentode alike? - diyAudio
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Old 26th June 2005, 11:31 AM   #1
Klimon is offline Klimon  Belgium
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Default VT52: are the triode and pentode alike?

hello,

I just bought some nos Mullard VT52 pentodes. Allas, all of the vt52 schematics I can find are for VT52 dht triodes. Strangely enough both (seemingly very different) tubes share the same name and I can nowhere find any article or mention that explains the difference between these two types or that talks about the history of the vt52...

Is the pentode a later version? Can it be used in a vt52 triode circuit by connecting it in triode mode?

And most importantly, does anyone know if it sounds good? I've heard good things about the triode, but the type I have is and looks very different (with topcap and box-anode I think it's called). You can find a picture and specs here:

http://www.r-type.org/exhib/aad0072.htm

Many thanks!
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Old 26th June 2005, 12:40 PM   #2
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I'm afraid they're two different valves with the same name, one British (pentode) and the other American (triode).
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Old 26th June 2005, 12:46 PM   #3
Klimon is offline Klimon  Belgium
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Old 26th June 2005, 03:24 PM   #4
mcs is offline mcs  Denmark
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You can find data here:

http://frank.pocnet.net/sheets/046/e/EL2.pdf

Best regards,

Mikkel C. Simonsen
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Old 26th June 2005, 04:30 PM   #5
Klimon is offline Klimon  Belgium
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Thanks

I'll probably leave it at that and sell the tubes.

Now I understand why I only paid a fraction of what a REAL vt52 costs
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