I've been accumulating some of the hard-to-find parts needed for this project for a couple of months. I believe I have enough to make a start. The circuit is based on one published in "Solid State Design for the Radio Amateur" beginning on page 132. My receiver will have SSB & AM I.F. filters rather than SSB & CW as per the original project. I 'll also be using Murata ceramic filters in place of the original Collins mechanical filters. An AM detector circuit will need to be included. It is hoped to be a more physically compact build than my Progressive Receiver which is described on another page.
Some CA3028A integrated circuits and some miniature 455KHz I.F. transformers have been sourced. The JW Miller I.F. transformers specified are no longer available. The VFO PCB has been built and tested and a National Velvet Vernier dial was found in the junk box. It is similar in appearance to the one used in the original article.
All PCB artworks have been completed for all of the circuit boards required for this receiver including the fixed tuned preselector, tunable preselector, RF amplifier/mixer, AGC amplifier, I.F. amplifier/product detector, I.F. ceramic filter switching, BFO and audio amplifier circuits.
Tuesday, 12th June 2018
A Homebrew 160 Metre AM & SSB Superheterodyne Receiver
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Page last updated July 3rd, 2018
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