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For the 7 to 10 MHz band L1 is formed by 3 turns of 22 to 28 AWG wire in a ferrite core 15 to 20...
This sweep oscillator was found in 1980s American documentation and can be assembled with current...
This circuit uses a FET and a BJT to give a x300 gain for the input signal. So a 50 mV signal at...