No Spam wrote:
Hi Folks
I have a FPM-300 with a few dead xtals. I can order the xtals but I have
no clue about the designation of the mount or the pf/ohm of the xtal.

The manual has part numbers but none of the other information. (see below)

As far as the size, the manual describes needing a "type CR-55A/U or
CR-72/U for HC-18/U holder" but http://jancrystals.com/chart.html and
others only describe other specs (HC25 plugin can) that appear to be the
same size.

If you call up ICM or JAN, they will almost certainly have the required
specs in the book and they can tell you exactly what you need. Expect
to pay $20 each or so.

How wrong could I be in ordering a xtal that physically looks right at
the proper freq?

If it's designed for different load capacitance, it won't be right on
frequency. For an application like this, that's not critical but it
might require a little tweaking. Just call them up and they'll know
how to do it precisely.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."