Does anyone know how common 10.7MHz oscillator crystals are and where I can
get them, preferable in Canada.

The reason, I've decided to build a 21MHz xcvr and the 10.7MHz crystal, when
multiplied by 2 is at 21.4MHz which is at the top end of that band. The
10.7MHz crystal will be running the LO (obviously).

TIA

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Donovan Hill
VA7LNX (Basic, Advanced)