I wanted to hear an amplifier with current feedback, only gain 3 stages, negative second harmonic and a sound character like a single ended triode. Wanted a bit of power into 4r so I went with the pucks because of the higher power dissipation capability.
As power supplies I got some used 350w/48V meanwell smps.
I set them for 48v and the bias at 2.3a which brings the heatsinks(40x26x4cm) quite hot.
The amp can work from a single 40 to 60vdc power supply and it has a voltage gain of ~9.5x
For the moment I am using this schematic
Opto IC1 acts as a servo the keep the output of the amp at 1/2Vcc+2V.
I did some thd measurements into 4r
Higher output power is possible but you will need some serious heatsinking 🙂
Here it is looking shinny
There was some debugging to be done but everything was close to what the simulation shown.
Now it`s time for some tracks 😉
As power supplies I got some used 350w/48V meanwell smps.
I set them for 48v and the bias at 2.3a which brings the heatsinks(40x26x4cm) quite hot.
The amp can work from a single 40 to 60vdc power supply and it has a voltage gain of ~9.5x
For the moment I am using this schematic
Opto IC1 acts as a servo the keep the output of the amp at 1/2Vcc+2V.
I did some thd measurements into 4r
Higher output power is possible but you will need some serious heatsinking 🙂
Here it is looking shinny
There was some debugging to be done but everything was close to what the simulation shown.
Now it`s time for some tracks 😉
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