[Boatanchors] Pair of Crystals needed

[Rob Atkinson]

Al thanks.   Yes that was just an example--not meant to be pursued as
it was an invitation auction ( or something like that) and overseas
some place.

ICM in Oklahoma City has new 455 kc IF crystals.

73


Rob
K5UJ

On Sat, Mar 8, 2014 at 11:26 PM, Al Klase <ark at ar88.net> wrote:
> Rob,
>
> Yes, I should have included those as well. The crystals with the three-digit
> channel numbers, 270-389, produce output frequencies of 27.0 to 38.9 MHz.
> The multiplier in this case is 72. So channel 328 = 32.8 MHz /72 = 455.555
> KHz etc.
>
> Looks like anything close was already picked from your E-bay box. They were
> popular for homebrew crystal lattice filters in the old days.
>
> The 21st Century solution is programmable crystal oscillators. The
> distributor does this to your specification. Prices appear to be way less
> that 10 bucks each. Start with Digikey.
>
> Al