There is no excuse anymore not to provide your receiver or transmitter with a frequency counter.
For 6 euro's I built a counter which measures frequencies from 1 Hz till 50 MHz.
I ordered the "Do It Yourself" kit here:
http://www.banggood.com/buy/Sku184055.html
The counter can also be used as crystal tester.
The counter is designed around a PIC 16F628 that also contains a table with most used IF frequencies which you can add or substract from the measured frequency.
Very nice design with big LED displays !
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The counter works ! 16 MHz X-tal here under test
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For 6 euro's I built a counter which measures frequencies from 1 Hz till 50 MHz.
I ordered the "Do It Yourself" kit here:
http://www.banggood.com/buy/Sku184055.html
The counter can also be used as crystal tester.
The counter is designed around a PIC 16F628 that also contains a table with most used IF frequencies which you can add or substract from the measured frequency.
Very nice design with big LED displays !
Kit parts
Half way
Close look with 4 MHz X-tal under test