Gibson GA-40T Amplifier
This is the Dual 6V6, 5Y3GT Rectifier, 12AX7 phase inverter, 6SQ7
tremolo driver, Dual 5879 preamp tube version.
All original as far as Cab, Chassis, Transformers, 95% of the circuit is
intact with original resistors, Yellow Astron coupling capacitors,
potentiometers, jacks, wiring and Jensen speaker. The items changed by
the previous owner are the electrolytic capacitors and the power tubes.
Most of the other tubes look old stock from the 60's. Power tubes are a
black glass 6V6GT.
Speaker is a Jensen Chicago P12 Alnico Silver.
The 6SQ7 tube (though still functioning fine) may want to replace in the near future, as it reads just above the acceptable pass mark on the tube tester. This is not an essential
replace item as it only drives the tremolo circuit.