Rap 'n Tap
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From: John Davidson
Date: 8/21/00
Time: 3:21:33 PM
Remote Name: 206.16.140.254
Gordon, Note that, as a variometer, the combined inductance is considerably higher than the sum of the inductances of the coils, perhaps over twice, depending on coupling coef.
I don't understand why this received SW, with a parallel 365 pF cap. That being said, I also don't understand why you would connect a variometer and a variable capacitor both to tune. With the capacitor adjusted to the small C setting, along with the variometer at the low L setting, could possibly reach some shortwave, I suppose. Why not BC at the other extreme though, I don't know.
However, as a variometer, the stator alone did not have enough inductance to get you to the low end of the band. The rotor alone also probably lacked enough inductance, alone, to tune the antenna down below 800 KHz either. There is also probably considerable pulling of one coil by the tuned frequency of the other. _J_