Tuesday, December 10, 2019

Lambda Diode Oscillator

This simple oscillator will drive a converter to feed DBM or Gilbert Cell. The first step in building a new radio will be the LDO. It can be made with plug in coils and be multi band. It can hardly get any simpler. A couple of JFETs and a resistor feeding a tank circuit will work. A series resistor to limit the current is a good idea.

The resistor is being changed to determine what size pot will work.
The plan is to put a 470 Ohm resistor in series with a 1K Ohm pot.
A low value resistor allows the current to soar and a high value will kill the oscillator.  The 470 Ohm to 1470 Ohm should be a good trade off.

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