Posted on Dec 23, 2012

The circuit uses easily available components. Most of the coils are wound on low cost balun core. The circuit uses ladder filter. Filter is build around four numbers of 4.43 MHz crystals. I used ladder filter because it is cheap and getting reasonably good reports. The circuit uses two numbers of MC1496. First MC1496 functions as receiver mixer cum balanced modulator. Second MC1496 works as product detector cum transmit mixer. The block diagram of the transceiver is given below.

Presently the circuit is only for 7 MHz SSB operation. It can be modified for other bands by suitably changing VFO, transmit band pass filter and receiver band pass filter. I had avoided CW and AM provision for simplicity. CW and AM can be implemented by

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