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#26
08-17-2019, 02:29 PM
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Usually, the RF stages were in the 1,3,5 tube positions, (separation to avoid feedback), and the audio amps in the 2,4 position. Easy enough to figure out, you can start at the antenna or speaker term and trace them out..
1. all the filaments lit? If so, check the plate voltages. Usually, the audio transformers primary windings are open (corrosion) so no plate voltage. Secondaries are not immune.. 
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