Re: Help identifying 1920s 1930s battery set
It looks like many kit sets of the era; thousands were built in that time.
The coils look like Telsen devices, so it may be one of the many designs that were published in the Telsen Radiomag of this era.
Usually a good set to work on. It will need a 2V accumulator for the valve heaters;an HT battery (with tappings)of 120v max (120 for audio OP, 90v main HT and possibly 63.5 v for the SG. A grid bias battery of 4.5v or more is needed to provide neg bias to some valves.
NOTE DO NOT OPERATE THE SET WITH THE GB DISCONNECTED, OR EVEN CHANGE GB TAPS. THIS WILL DAMAGE COMPONENTS< VALVES ETC.
Faults are likely to be mechanical in nature (poor connections/ soldered joints). There is the possibility that the intervalve transformer will have one or more windings open circuit, but it can easily be rewound; you may get lucky and manage to by one (3:1 is the common ratio)
Ed
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