On Thursday, May 20, 2021 at 8:44:37 AM UTC-7, John Crane wrote:
On 5/19/21 10:12 PM, Phil Allison wrote:
John Crane wrote:
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Does anyone know of a source for 784 MHz crystals?

** You mean kHz.

I'd like to try to 'accurize' the timer in the HP-45 calculator.

... I'm sure there has to be some company that can custom
manufacture crystals to specs. I did try Bomar, but have not received a
reply.

There's factory-programmable oscillators that use internal logic to create
custom frequencies, which has better cost and leadtime than custom crystals.

DigiKey will even program it for you...

https://www.digikey.com/en/products/detail/epson/SG-8018CB-TJHSC/7784073