First Watt my way.
Actually puts out 2 Watt with acceptable distortion.
But not much more. Depends on the supply voltage which is 20 Volt single end.
Actually puts out 2 Watt with acceptable distortion.
But not much more. Depends on the supply voltage which is 20 Volt single end.
Choke based L'amp, a Sony 2SK82 VFET SE follower amp is here. Parts count is 11 + Meanwell 24V SMPS.
The way to improve that scheme is to increase drive to the output transistors. Make the bootstrap a pair of 82 ohm resistors and U2 one of those old D40K type darlingtons.
EF2 has a larger crossover region, period. Unless first stage of it stays in class A. Also robs 2 Vbe. When those two vbe are a significant fraction of the supply voltage, you may not want to part with them. Running off 6-12 volts, EF1 is the way to go unless you are trying to drive 2 ohms or something. Unless you can find a nice pair of Ge’s and can make or find a totem pole driver transformer. I had a number of old car radios that did that - and they played cleaner than any modern (non-high-power) ones using those stupid chiplifiers. I mentioned I found a way to make those sound good, but damn it generates heat.
This true, but don't exaggerate it.
The it is not a problem to keep the first stage of EF2 in class A. With a proper VBE multiplier, the output impedance of the first stage could be way lower than the input impedance of the output stage. Crossover region won't be affected that much.
PP EL84 triode running class A driven by an ECC81 LTP. All poly caps including the PS. Based/inspired by Eli’s El Cheapo
Based on chassis and iron from a Scott LK48/222. Once stripped the holes are left.
dave
For a decade a 300b tube amp was my sweet low power amp. It was replaced by the lme49600 amp.
Mids and highs are the same but the bass control is tighter. Total image was also the same.
Lme49600 is much cheaper.
Mids and highs are the same but the bass control is tighter. Total image was also the same.
Lme49600 is much cheaper.
