Quite a few crystal oscillators in a receiver are running on the third-harmonic of the crystal's fundamental frequency. The local oscillator in consumer scanning receivers was calculated with this formula:

The formula generated a local oscillator frequency that was the first IF frequency (10.7 MHz) after the mixer stage.


On 11/6/2022 12:33 PM, Andy Brian wrote:
Hi,

I'm looking for good source of crystals between 156.5 and 156.600MHz for build experimental
linear transponder. Please for any got information or some other solutions.
I received a few from marine scanners but it seems not 156Mhz



-- 
73 de JoAnne K9JKM
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BM DMR TG 98006