This image shows the coax cable connecting the "Xtal Filter Out" to the "Xtal Filter In" from Board 1 to Board 2. Shielded cable should always be used here, or the second mixer will pick up all kinds of signals. |
The connection at the end of the Crystal Filter on Board 1. The phone jack is the speaker connection soldered to the ground plane on Board 2. |
The connection to Board 2 at the input to the Second Mixer. |
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