Cheap 10.111 MHz crystals: How far do they swing in a super VXO circuit?

3,915 views · Published 15 August 2018 · 4:44 · Indexed 10 November 2026

Channel: Amateur Radio VK3YE · 2018 · Science & Technology

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Cheap 10.111 MHz crystals are sometimes available in bulk for a few cents each.  They're handy for 10 MHz homebrew CW transmitters. How well do they work in a VXO circuit?  

In this video I try two crystals in parallel.  Series L and variable C allows stable coverage over the CW end of the band. The oscillator is even stable enough to key if desired.

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