The 6AQ5 is probably more sutable for the output stage of audio amplifiers than the 6C4 - even if it isn't a triode, you can try triode-strapping it, or apply a large amount of local feedback around the output stage such that the problems with pentode-mode operation are greatly reduced.
Just for reference, some links to datasheets on Franks: 6C4, 6AQ5.
The number of valves you'll need for 20W will depend on whether they're run class A or class AB. But you have plenty, so it shouldn't be so much of a problem
Just for reference, some links to datasheets on Franks: 6C4, 6AQ5.
The number of valves you'll need for 20W will depend on whether they're run class A or class AB. But you have plenty, so it shouldn't be so much of a problem
day said:
The 6AQ5 was the small bottle version of the 6V6. Quite similar to EL84/6BQ5 and except for some changes to the cathode R pretty much interchangeable. Lots & lots of stuff out there to look at to apply them to an amp.
Make a nice 1.5-2 W SE amp in triode, 4-5 W SE in pentode (search on the forum for RH84), 4 W in PP Clas A, 12-15 in AB PP.... and you could parallel for more power (althou likely at a sacrifice of coherency).
dave
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