Re: Station Radio C-12
Yes, its a tricky problem to get a C12 to work well. The cross-modulation is severe when there are large broadcast signals about. I have literally had to abandon using the set because all I could hear (regardless of the tuned signal frequency) was a local AM broadcast station.
One solution might be to keep a PI network on transmit, but to switch in a pre-selector on receive (only) that has at least a pair of coupled resonant tuned circuits. The loss through such a pre-selector is not particularly important on receive, though you would not want that loss on transmit.
Richard
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