Crystals

[Domenic M. Mallozzi]

Regarding crystal frequencies, the people who have commented on load
capacitance and series resonant crystals are correct, in circuits with other
design constants they frequency of oscillation may be noticeably different.

Also, FT243 crystals and similar items are not high precision devices. If the
seals are old I have seen them change frequency due to oxidation and also as
the years go by the pressure applied to the crystal by the electrode and
spring tension changes result in frequency changes.

Dom
N1DM

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