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Comments
30w has EL34's.
Blackstar HT-20 . Cathode biased to all intents and purposes, has some -ve adjustment but limits pretty much like a pure CB amp. FX loop, Emulated out.
If you have other cabs, save yourself some dosh and buy the head. The Rocket 50 in the combo is not enamoured by many!
Dave.
All the Matchless amps I've seen with El34s use cathode bias.
I'm actually quite surprised that there are not more large-valve cathode-biased amps these days. The requirement for maximum clean power - the major advantage of fixed bias - has passed long ago, and cathode-bias has advantages from a user point of view as well as probably being slightly cheaper to implement for the manufacturer.
Separate cathode bias - which is rarer than shared - even means that you don't have to be fussy about matching valves.
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