Ultra Model 50 (1937) Restoration
Good Afternoon,
Today I bought an Ultra Model 50; this will be my first pre-war radio!
It is in good external condition and looks to be intact. All of the valves and knobs are present. I have not looked under the chassis yet. It looks like a new mains lead was attached to part of the existing lead. I cut it off.
This looks to be a good radio. It has an RF amp and a three gang tuning capacitor!
I have a copy of the Trader Sheet and the manufacturers service data from the data CD.
Plan of Attack
Give the radio a gentle clean outside and out.
Clean any switches, potentiometers and valve bases.
Eventually, a new three core mains cable.
Cold checks:
Pots and switches.
Mains transformer primary and secondary resistances.
Audio output transformer primary and secondary resistances.
Check for HT shorts to the chassis.
Reform smoothing and reservoir capacitors.
If the above checks out OK I will remove all the valves bar the rectifier and check the smoothed and unsmoothed HT voltages. With my lamp limiter, of course!
That's all for the moment.
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