For between $20 and $25, I returned home with headphones, a tuning coil
, a crystal detector, a condenser and other mystifying gadgets.
The second method is to set the free-running frequency to a desired low end frequency and tune the low power tuning coil
current in a positive direction to achieve +2000 MHz tuning range.
This correction is achieved by feeding back the discriminator voltage to the electromagnet tuning coil
with a gain of approximately 200.
0 3 dB bandwidth (MHz) 30 to 60 Coarse selectivity (dB) 36 Tuning coil
current (A) 0.
A simple PLL/FM modulation connection with a fine tuning coil