01-19-2006, 04:48 PM
There are quite a few factors in making a wireless record player work. Philco coupled the output of the oscillator to the AC line through a small mica capacitor. Other companies had a third wire in the line cord for an antenna. This was about the same thing as Philco had done, as they used the cpcacitve coupling into the line with the third wire.
The radio receiver antenna, be it loop or regular wire antenna can make a difference. If the set has a filter network in its AC line input, that will block reception from the wireless phono.
I assume that your RP-3 has the same oscillator in it as had the RP-1 and -2 models. I have a 41-RP-2 that friends gave me. They bought it new, and we kids spent scores of hours listening to records on it, playing it through an old US R&T "Radiotrope" console about 25 feet away in the living room. It worked like gangbusters. You could also pick up the player elsewhere in the house. It was broadcasting through carrier current transmission.
You might also check the crystal pickup output. They used a high output cartridge in the pickuip on those sets, to get sufficient modulation.
The power supply in those oscillators ran the 6A7 at about 150 Volts, so it wasn't wringing a lot of RF out of it. You might check the power supply output, though it's probably O.K.. A check of the 6A7 might show a weak tube. TYhe 84 rectifier certainly wasn't being pushed to capacity!
Those players are so disgustingly simple that it's hard to find something that could be wrong.
The radio receiver antenna, be it loop or regular wire antenna can make a difference. If the set has a filter network in its AC line input, that will block reception from the wireless phono.
I assume that your RP-3 has the same oscillator in it as had the RP-1 and -2 models. I have a 41-RP-2 that friends gave me. They bought it new, and we kids spent scores of hours listening to records on it, playing it through an old US R&T "Radiotrope" console about 25 feet away in the living room. It worked like gangbusters. You could also pick up the player elsewhere in the house. It was broadcasting through carrier current transmission.
You might also check the crystal pickup output. They used a high output cartridge in the pickuip on those sets, to get sufficient modulation.
The power supply in those oscillators ran the 6A7 at about 150 Volts, so it wasn't wringing a lot of RF out of it. You might check the power supply output, though it's probably O.K.. A check of the 6A7 might show a weak tube. TYhe 84 rectifier certainly wasn't being pushed to capacity!
Those players are so disgustingly simple that it's hard to find something that could be wrong.
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