I've been pursuing this area of interest by getting a wobbulator and sawtooth generator constructed, and those are now near to completion.
With those available, I was wondering about how best to start to learn a little about how the ceramic filters work in-circuit (and how wobbulators work
). I've extracted an old Pye Vanguard IF board from the junk box and think it might make a useful testbed (at least for transistor circuits).
The attached figure shows the IF stage and is marked up to show some positions where I thought filters could be installed. I think the AGC should be disabled and the winding that feeds MR2 used to take an RF output from the board.
Any thoughts?
B