I decided to continue working with my recent idea of a transceiver with a triple frequency conversion, to be more precise, the third conversion is used for AM / FM modes.
The first conversion was performed on a pair of standard quartz filters at a central frequency of 45 MHz. The second transformation, a self-made 8 and a crystal quartz filter at 6 MHz. The third transformation used a standard five introductory piezoceramic filter with a frequency of 455 kHz.
At the moment, I have:
Strip Filter Card (BPF)
Low-pass filter card (LPF)
All boards have been pre-configured, it remains to assemble the stand and connect them together. Actually, that's what I'm going to do.
And so, I finished with the assembly of the stand, everything connected and made the first launch of the transceiver
Here's how it all looks now :)