Here's one: http://sound.westhost.com/project12.htm
There are also lots using the 2N3055 / MJ2955 pair.
There are also lots using the 2N3055 / MJ2955 pair.
The AmpsLab C70 seems to fit the bill. Not quite 80W, but near as. You could probably add another pair on the outputs and raise the rail voltage to make it 80W if you really wanted.
http://www.ampslab.com/c70.htm
Getting anything higher with those transistors is a bit of a no-no unless you're prepared to parallel a load of them. Doing that would probably be more costly than just buying MJ150003/4 or MJ21193/4, unless of course you happen to already have a large stock of N3055 / MJ2955
http://www.ampslab.com/c70.htm
Getting anything higher with those transistors is a bit of a no-no unless you're prepared to parallel a load of them. Doing that would probably be more costly than just buying MJ150003/4 or MJ21193/4, unless of course you happen to already have a large stock of N3055 / MJ2955
That transistor is biased through the 10K resistor from emitter to output. The capacitor estabilishes only the AC path. The feedback signal is applied directly to the emitter while the input signal is applied to the base
It's surprising how people gets lost when they look at amplifier schematics without long tailed pairs or current sources
Actually this old-school layout has probably higher gain and higher bandwith than any LTP with current sources
It's surprising how people gets lost when they look at amplifier schematics without long tailed pairs or current sources
Actually this old-school layout has probably higher gain and higher bandwith than any LTP with current sources
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