A challenge to rebuild and repair this sought after British Amplifier.
Where to start you may ask
A short restoration story
First thing to do was remove the chassis from the case. Once the 2BA screws had been gently removed the chassis pulled out to allow access of all areas. I worked out which valve types were missing, after replacing all of the leaking capacitors. Not just the electrolytics but coupling capacitors as well.
Measured all of the resistors and to my surprise, all were within tolerance. The valve holders for the output valves were intermittent, so I replaced them. I fired it up and checked the cathode voltages and HT for a correct ball park measurement. All looked OK. Removed my dummy load and connected the loud speaker. There was an awful grating noise. That was a piece of glass from a broken EL84 wedged in the basket of the loudspeaker. Removed it and it then sounded a lot sweeter.
The next step was to test the tremolo and gain switch. Tremolo was working once I had fashioned a foot pedal for it. I removed the home made board on the back of the gain switch and fitted three components, neatly and out of sight. The pop rivets that held the valve bases and switch in were replace with stainless steel pan head screws and lock nuts. New speaker cable from the transformer and finally checked for electrical safety.
