View Single Post
Old 5th Oct 2017, 5:13 pm   #32
Biggles
Rest in Peace
 
Join Date: Feb 2004
Location: Hexham, Northumberland, UK.
Posts: 2,234
Default Re: Common Pye PF1 RX deafness problem

It's very easy to make a 10.7Mhz marker oscillator. Someone on here may even have a one they don't need any more. There must be quite a few lying around unused since the advent of synthesisers in PMR sets. They were an essential tool in days gone by. They are a quick and easy yes/no check to see if the IF stages are working. You can also use them on the second harmonic for 21.4MHz IF's too, although the main function is to make sure the local oscillator is aligned for optimum receive sensitivity, by adjusting the radio for zero beat in the speaker.
Alan.
Biggles is offline