Cool,lineup.Can you please show your circuit and informations,Thank.Here I will present a good way to produce 4 Watt in a simple way without global negative feedback and still have low distortion.
Uses only common transistors, type BC547B.
Class A with a few Watts would be perfect for you.Thanks lineup,I will try.I very love small class A amp.I'm not listening to lound I guess maybe 1-2 watt (my room is small and I don't want to disturbing other poeple in my renting house.)I have a small tube single end class A receiver(Silvertone) that I took from console.Its sound nice but a little bit hum and I don't know how to fix.My system is pioneer cd player and alesis monitor one speaker.I listening to mostly jazz,blues,60's rock and country.Hope your circuit is not to hard to try ( I have background about electronics but not fluent in tube honestly)
I am always very glad when AKSA think it is worthwhile to comment.Lineup,
A very nice circuit. Elegant driver. Do you think you could almost double efficiency with an inductor in place of the CCS?
You have added something very worthwhile and good sounding to DIYaudio! Congratulations!
Hugh
I could make an attempt to see what is the output impedance.Thanks lineup this is very sweet
Any indication what is output impedance roughly ?
Hi lineup,At 1 Watt RMS out, the distortion is only THD 0.006%.
That is very good for such a simple circuit.
We can almost call it HIFI![]()
Hi lineup,
thanks for posting the nice idea. My impression from an own small class A amplifier, many years ago and much simpler, was: Whow, what does it sound smooth!
At which frequency do the 0.006% hold? For room-listening levels, a good performance at 1W is usually enough. But it really has to be good.
Maybe, you already know my hobby: are there any stability issues with the triple darlington? I'm just wondering about the 47p cap.
Cheers,
Matze