Buckeyedog said:Bias terms are funny. Fixed bias means you actually have to adjust the bias. Cathode bias is where you just plug and play. The Tweaker is plug and play and you can use 6l6's and EL34's and probably some other octal based tubes like a KT77.
The manual should have pre amp tube stuff. Check out Egnateramps.com and maybe there is some info there.
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