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want to build SE450TL
want to build SE450TL
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Old 18th February 2005, 04:35 AM   #21
day is offline day  Thailand
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wow!!! 6C4 p-pp look nice . if i need about 20watt how many tube can use. i aso have 50 of 6AQ5 but it si not triod.
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Old 18th February 2005, 06:37 AM   #22
audiousername is offline audiousername  Australia
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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
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Old 18th February 2005, 07:40 AM   #23
planet10 is online now planet10  Canada
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want to build SE450TL
Quote:
Originally posted by day
i aso have 50 of 6AQ5
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).



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