View Single Post
Old 17th Nov 2017, 10:24 am   #2
Andrew2
Nonode
 
Andrew2's Avatar
 
Join Date: Mar 2010
Location: Dukinfield, Cheshire, UK.
Posts: 2,033
Default Re: R209 - BFO injection

I don't know much about the architecture of the 209, but some receivers of that era did not have a product detector and just squirted a bit of BFO into the final IF stage or the AM detector. Obviously this would activate the AGC and depress the audio. The recommended procedure was to turn up the AF gain and control the volume with the manual RF gain control. Never very satisfactory IMO.
__________________
Andy G1HBE.
Andrew2 is online now