[R-390] Product detector kits

[DJED1 at aol.com]

Jan's detector is a varient of a circuit I offered to the board several years 
ago.   I have one problem with his circuit in how it differs from mine.   As 
best i can tell from his published notes, he has included the product 
detector, but not the auxiliary fast attack AVC which I included in my circuit.   He 
says in his writeup that you need to reduce the RF gain for strong signals, 
while my AVC allows full gain on signals up to 80-100 dB.   His detector may work 
well if you have modified the radio's AVC with the Lankford modification.
Ed   WB2LHI