Neve 1272 Schematic ((link))

The yellowed diagram was traced in 1974. Heavy graphite lines mapping the heart of the Neve 1272 bus amplifier.

Typical schematic excerpt (conceptual)

Detailed Circuit Analysis

1. The Mic Preamp (with three gain stages and a Carnhill input transformer).
2. The Line Amp (a four-stage amplifier used for channel output and bus driving).