View Single Post
  #5 (permalink)  
Old 08-05-2015, 4:37 PM
fredg's Avatar
fredg fredg is offline
Join Date: Dec 2007
Location: East Central Kansas
Posts: 105

Originally Posted by ko6jw_2 View Post
Commercial crystal receivers had netting trimmers to precisely adjust the oscillator using the discriminator test point. Only a tiny number of consumer scanners offered this feature. The problem is that the tolerances for receiving crystals were not very tight. I remember returning crystals to me local radio distributor many times until I got one that worked. The IF is not the only parameter to be concerned with. Most scanner crystals were 3rd overtone mode plus or minus the IF frequency. It is important to have the correct design if the crystal is to work properly.
Thank you! I thought something like that but did have the technical details!

Like I said, Gary at understands what you said above, so hopefully he will hook me up!!
Reply With Quote