Stable Vfo

  
This VFO circuit covers from 2.13 to 2.58 MHz and is intended for use with an external mixer to heterodyne the signal to desired
Stable Vfo - schematic

frequencies. Coil data is shown in the parts list. Two power output levels are available—a few hundred mW (0 to +3 dbm) from Q3. Q4 is a class A amplifier for boosting the power to +22 dbm for driving a high-level mixer. The VFO can be operated on other frequencies, with suitable component charges (see the table).




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