Neve: 1272 Schematic

Add a 10k potentiometer in parallel with the secondary of the input transformer. Adjusting this changes the load on the mic, softening the high end like a variable "tone" control.

WARNING: Never disconnect the output transformer load. The BA283 needs a load (600-10k ohms) or it can oscillate and destroy itself. Neve 1272 Schematic

+24V ──┬───┐
       R    R
       |    |
       C    ├─── Q2 (B)
       |    |
Q1 (C)─┼────┘
       |    |
       R    R_e2
       |    |
      GND   GND

Feedback: R_f from output xfmr secondary tap to Q1 emitter.
 Add a 10k potentiometer in parallel with the

For exact schematics, refer to original Neve BA283 drawing #13486 (available in vintage audio archives). +24V ──┬───┐ R R | | C ├───

The 1272 is a Class A device. In the schematic, you will see that the output stage relies on a push-pull arrangement using Darlington pairs, but the biasing keeps the transistors conducting heavily at all times.

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