[R-390] Crystal substitution puzzle

[rbethman]

Fair radio still sells MANY of the crystals used in the R-390A.

I suspect that the circuitry exceeds the ability of the "less" expensive 
alternatives.

Bob - N0DGN

David Wise wrote:
> My R390A's Y411 (16MHz) has died.  Since it was
> cheap to try, I bought all the wire-lead 16MHz crystals
> that Mouser stocks, five in all, and put them in.
> They run, but every last one of them is 1.5-2.5kHz low,
> which is 50% out of spec at best.
>
> This is five different parts, from Citizen, Fox, ECS,
> Abracon, and Vishay/Dale, so it's not a bad part or
> a bad lot.  The original crystal, though too weak to
> mix well, is right on.  It's a disappointment, as the
> new ones are around $.50 each and I hoped to open
> up an alternate supply for about half of our second-oscillator
> crystals.  I can live with the error, but still - what's up?
>
> Dave Wise
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-- 
Bob - NØDGN