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Variable Frequency Oscillators (VFOs) - QRP ARCI - …

1. Chapter 10, Harris CRYSTAL SETS TO SIDEBAND. Frank W. Harris 2010, REV 12. Chapter 10. Variable Frequency Oscillators ( vfos ). Sooner or later you'll become frustrated with being stuck on a few crystal-controlled frequencies. You would like to have a Frequency -tuning knob that covers the entire band and not just a few kilohertz. This sounds simple, but isn't. It's difficult because, without the stability of a crystal, an ordinary RF oscillator will drift hundreds of hertz while you're sending. The fellow you're talking to probably has a modern transceiver with a narrow, stable passband. From his perspective your signal quickly drifts out of his passband.

2. Chapter 10, Harris I was recently talking to a brand new local ham on 40 meters CW. We were chatting at a leisurely 5 words per minute.


  Variable frequency oscillators, Variable, Frequency, Oscillators, Vfos




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