[AMSAT-BB] Re: Crystals for 2m

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:

* Receive frequency - 10.7 MHz / 3 = crystal frequency

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