01-08-2013, 08:50 PM
I just received today a BK Signal generator, model 2005B, for the purpose of trying to align several radios I have. The one "under the knife" this evening was the Philco model 49-504. I went by all instructions, set the scale knob of 300-1000kHz, Internal Modulation and attenuator on low and followed instructions per the Sam's schematic. When I got to the last part about setting the generator to 1600kHz, I had made ahead of time a loop of about 5 turns of #20 ga wire and radiated signal into the radio which has an antenna top to bottom and sides of the inside back of the cabinet.
After all this I disconnected everything and put the chassis back in the cabinet and brought it to another area where there wasn't so many electrical wires and connections as on the bench. It's still not tracking properly. I first noticed a strong local station at the low end of the dial, 620KC, was picking up around 650 and it was like that from low to high end. The volume was also low on most all stations. I could touch the antenna around any place just inside the cabinet and volume went way up. Some stations on the high end will go up and down in volume. What have I missed?
After all this I disconnected everything and put the chassis back in the cabinet and brought it to another area where there wasn't so many electrical wires and connections as on the bench. It's still not tracking properly. I first noticed a strong local station at the low end of the dial, 620KC, was picking up around 650 and it was like that from low to high end. The volume was also low on most all stations. I could touch the antenna around any place just inside the cabinet and volume went way up. Some stations on the high end will go up and down in volume. What have I missed?
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