Thread: Dumont RA-103
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Old 09-12-2020, 02:22 PM
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Electronic M Electronic M is offline
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Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
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That speaker wire is factory. Don't touch it! If you look carefully it actually does not directly connect the 2 coils. One wire of the zip cord goes to one coil and the other wire goes to the other. It forms a very low pF capacitance that couples the 2 stages. Radio men called it a 'gimmick' capacitor.

I've seen this in multiple RA-103s over the years. If you remove it you may have to realign your IF.

There were a few production runs of the RA103 and some used a small capacitor and others used the zip cord gimmick.
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