Saturday, 19 March 2011

1.8-1.9 MHz VFO

MPF102,1N914,2N2222 circuit : 1.8-1.9 MHz VFO

Series-tuned Clapp oscilla-torusing high-impedance JFET at has good fre-quency stability. Diode stabilizes bias. Air variable C1 provides frequency spread of exactly 100 kHz. L1 is 25-58 μH slug-tuned (Miller 43A475CBI). L2 is 10-18.7 μH slug-tuned .

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