Author Topic: Similar three transistor op-amp found in bass amp  (Read 6312 times)

Crazyyellowfox

Similar three transistor op-amp found in bass amp
« on: September 19, 2009, 11:50:54 PM »
I just realized that there is a very similar circuit to this in my Ashdown practice bass amp...
it's actually a high voltage op-amp made up of two mpsa92 and one mpsa42.
Instead of the dioe, the output is controlled by a negative feedback loop and a 10uf 'lytic
capacitor + resistor to ground on the inverting input.