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Old 27th April 2013, 05:18 PM   #1
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Default El34 as triode

Hi, a guy proposed me an integrated ampli with EL34 configurated as triode. I have to drive high sensitivity cabinets, i.e. Lowether loudspeakers.

How do these tubes sound in this configuration?

Many thanks to everybody

Ziocalepino
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Old 27th April 2013, 06:26 PM   #2
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In my Hi-Fi tube amp, which I call the Music Box, I've got a push-pull output stage with a switch to select between triode mode and ultra-linear mode. The differences are subtle, and depend on several other variables (speakers and room acoustics), but it sounds real good to me. Triode mode gives me about half the wattage, but a lower output impedance driving the speakers, so it's probably a more accurate sound (speaker resonances (impedance variations) are better damped). Others tell me triode mode definitely sounds better in their system. My amp can be viewed at:
Bob's Website
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Old 27th April 2013, 07:15 PM   #3
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I have a 2A3 S.E. amplifier, built by the same guy who proposed the other one. This guy is a mix between geniuos and foolish, but with amplification he is a whiz. So if his idea is to use EL34 as triode, I cannot immagine this could be a bad idea. To have less watt is not a problem, 3 W of 2A3 are really a lot with my drivers. The question is HOW this configuration sounds, but reading Bob's reply they seem not to be great problems. Any other idea is wellcome!
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Old 27th April 2013, 08:41 PM   #4
tinitus is offline tinitus  Europe
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Quote:
Originally Posted by ziocalepino View Post
Hi, a guy proposed me an integrated ampli ....
hi, what is your source/signal ?
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Old 27th April 2013, 08:49 PM   #5
45 is offline 45  Italy
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If you can find the Yugoslavian EI EL34 (with tipped glass) that is the best sounding for me, especially in triode connection. In comparison to other EL34's I have also measured less distortion at low and medium levels in the same operative conditions. It appears to be more linear. The only problem with the EI is the plate dissipation. It can only dissipate 20-22 W max. However you can still get about 5 (very good) watts from a single ended amplifier and 10 W from a push pull in pure class A, in triode connection of course, limiting plate dissipation at 20W.
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Old 27th April 2013, 09:03 PM   #6
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source will be a Marantz CD 14 or CD 63 kis
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Old 27th April 2013, 09:52 PM   #7
tinitus is offline tinitus  Europe
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balanced ?
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