04-21-2015, 03:49 PM
On this latest rewind of the oscillator tickler coil I went to 28 turns instead of 27. I also moved the tickler up about 1/16 of an inch. As is, I only hear a popping sound with the radio on. However, when I attach a 2 ft. piece of wire to pin 4 (the cathode) of the 36 tube, the radio springs to life, sounds great, and I can tuned across the band.
I think this has the effect of a gimmick capacitor. I have tried other small capacitors to replace the wire, but nothing seems to work as well.
I may leave it this way for now with the intention of doing the 6A7 conversion in the near future.
Question about the shadow meter. My shadow meter tests well. If I connect a 9 volt battery, it gives full deflection. But in operation, the voltage across the meter goes from about 9.5V (no station) to 7.3V (station tuned in).
Does that sound right? I get very little deflection.
Any suggestions on that?
Thanks again guys,
Mark
I think this has the effect of a gimmick capacitor. I have tried other small capacitors to replace the wire, but nothing seems to work as well.
I may leave it this way for now with the intention of doing the 6A7 conversion in the near future.
Question about the shadow meter. My shadow meter tests well. If I connect a 9 volt battery, it gives full deflection. But in operation, the voltage across the meter goes from about 9.5V (no station) to 7.3V (station tuned in).
Does that sound right? I get very little deflection.
Any suggestions on that?
Thanks again guys,
Mark