160 METER VFO


Posted on Feb 7, 2014

Standard Colpitts oscillator Q1 with emitter-follower Q2 gives dependability and adequate isolation from later stages Zener regulation provides stability even with weak battery Output is about 0. 7 VRMS. Low-level parasitic oscillation may occur about 150 kHz below operating frequency but is suppressed by tuned stages following VFO. L1 is 52 turns


160 METER VFO
Click here to download the full size of the above Circuit.

No. 28 enamel on Amidon T-50-2 toroid. RFC1 is 850 H. -A Weiss, Design Notes on a Moderate Power Solid State Transmitter for 1. 8 MHz, CQ, Nov. 1972, p 18-22, 24, 98, 100, and 102.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    600 watt audio amplifier (LM4702)
    wireless FM bug
    Variable Square wave oscilator with 555 circuit
    Programmable-amplifier
    Mains Failure Indicator
    12V Powered 12V Lead Acid Battery Charger with Indicator
    Digital Clock Circuit with T89C51 microcontroller
    bidirectional power inverter
    Proximity Sensor-based Remote Control Remote Control Demonstrator Board
    TV To Scope Converter
    Adding sync pulses to the video signal
    Bicycle Radio easy and cheap to build (April 1940)
    Robot Tutorials power regulation
    1-20 minutes a timing circuit
    The use of low-power tube amp tube radios restructuring



    Top