The DPA 880 low detail schematic (click on the image to see the high detailed
version (48 Kb)
Nothing much to discuss here :
Again, this one is similar to the above ones, only it uses serial connection in
the power stage to allow a higher voltage.
The bias current is 110 mA.
The output coil is 14 turns of 1.8mm wire on an 11mm diameter.
The trafo should be about 2*57 Volts and 20 to 25 amps !!!