Philicorda GM751

An interesting piece of musical instrument.
It uses a mixture of tubes and transistors.
Tubes: 8 x ECC83, 1 x ECL82, 5 x Z70U, 68 x ZA1001, 1 x ZZ1000
Transistors: 3 x AC125, 2 x AC128, 4 x AD149

View with cover removed.

Oscillators and frequency dividers

Closeup of the frequency dividers using ZA1001

Rear side of above board

ECL82 stabilizer
Power supply board

Output amplifier

Service manual as PDF here