Montgomery Ward / Airline GM9151a Vintage Tube Guitar Amp Serviced and Restored
The cathode bypass electrolytics were replaced in the preamp section as well as one of the power amp sections. The cathode bypass resistors were replaced with 200 ohm 10 watt parts to increase the cathode bias to 95% and it sound much better like that.
Tags: airline, gm9151a, guitar, montgomery, restored, serviced, tube, vintage, ward