Quote:
Originally Posted by Phil
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Since you are missing the speaker I am operating on the assumption you are also missing the output transformer, which appears to have been part of the speaker assembly. You will need a transformer of about 10K plate to plate primary with a secondary to match the speaker you chose, probably 8 ohms. You can probably find something suitable on eBay or from Hammond. You will also need a choke to replace L1. It is probably not critical value wise, since, if I am reading the schematic correctly, this set utilizes a 400 mFd capacitor input filter (!?). I think this is probably an error since it would exceed the 80 rectifier tubes rating by a huge amount. 4 mfd would be more typical. I would look for something on the order of 20-40 henrys @ 30-50 ma. Someone else may have better information for you on this. If it were me I would put a 10K adjustable wire wound in series with the choke and adjust it for 220 volts on the plate of the 6C5.
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It looks like the audio output transformer is powered through the field coil... I'd probably look for a choke rated for 150mA or more. Don't want to smoke the choke with excessive current.