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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: Yup posted by Tre' on August 12, 2021 at 14:10:28:
I've been wrangling with this problem myself due to the older HK amps I'm rebuilding. The transformers are 3.6K to 3.8K, non-UL, and they weren't meant for the EL34. The original tube was a beam power type, no longer available, and the EL34 is now the only tube that matches. Unfortunately, because it's a true pentode, the screen requirements of the EL34 in pentode mode are very challenging. You can't just use a dropping resistor and a bypass cap as is usually done with 6L6 types. I have at least four amps like this to "re-create", and it's giving me headaches and serious heartburn. :(
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- RE: Yup - Triode_Kingdom 14:39:11 08/12/21 (0)
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