[Heathkit] HR-10 IF leakage

[Robert Nickels]

Wonder if anyone has noticed 1680 khz IF feedthru with the HR-10 on 75 
meters?  I hear it on my HR-10 (plain) but the circuit for the HR-10B is 
the same as far as I can tell.   I tried a quick series trap but it 
attenuated the 75 meter signals way too much.  I'm not hearing it on 40 
and up, probably because the antenna circuit provides enough rejection.

By the way, I increased the value of the coupling cap feeding the AF 
Gain pot - Heath used only 500pf which made the audio sound pretty 
tinny.  Easy mod if you like a little more robust audio.

73, Bob W9RAN