03-31-2010, 08:36 AM
I would think that shielded microphone wire should be fine. The scan on Nostalgia Air is rather poor. The top side of the primary is connected to one pin of the 4-pin connector on the transformer. So, the signal from the photocell on the phonograph connects to the primary of the transformer (two closer spaced pins). I think the RCA jack is for connecting a microphone for the home recording option. The 1941 BOL units have a bayonet lamp socket on the transformer where the microphone plugs in.
Sean
WØKPX