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Adding a VFO to a Cobra 142

Discussion in 'CB Radio Modifications' started by Shadetree Mechanic, Dec 21, 2020.

  1. Shadetree Mechanic

    Shadetree Mechanic 808 On The North Side of Dover

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    tecnicoloco and Dmans like this.
  2. nomadradio

    nomadradio Analog Retentive

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    Pretty much any CB with a PLL. The VCO in most such radios will prove to be a drifty VFO. Stability is not a big issue when the PLL circuit is 'tweaking' the tuning voltage ten thousand times a second, locking it to your 10.24 MHz crystal.

    But using the radio's Voltage-Controlled Oscillator as an open-loop VFO will reveal that it's not terribly stable.

    Cute idea, though.

    73
     

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