UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Two or three IF stage Chinese radio kits.

orbanp1 · 4th Jan 2017, 2:42 pm

Here is an interesting detector circuit that gives quite a bit of output:
http://www.edn.com/design/analog/444...n-simple-diode
Note the "difficulty" with the AGC control voltage for a transistorized IF-amp.
As a simpler solution you could keep a "regular" diode detector in parallel for the AGC.
DISCLAIMER: I have not built it, just simulated it!

Peter

4th Jan 2017, 2:42 pm	#26
orbanp1 Heptode Join Date: Nov 2009 Location: London, Ontario, Canada Posts: 675	Re: Two or three IF stage Chinese radio kits. Here is an interesting detector circuit that gives quite a bit of output: http://www.edn.com/design/analog/444...n-simple-diode Note the "difficulty" with the AGC control voltage for a transistorized IF-amp. As a simpler solution you could keep a "regular" diode detector in parallel for the AGC. DISCLAIMER: I have not built it, just simulated it! Peter