An old CB transceiver is converted to the 50MHz amateur band using an Arduino Pro Mini, DDS, PLL and OLED display.
Project in progress by hvde
Yes , thanks , and now it also works on 70MHz. This makes life easier when working in SSB. The frequency can be tuned in 10Hz steps.
I have added the diagram of this PCB. The PCB was originally made to replace a TA7310 IC in another project. The TA7310 could not convert to 70MHz. Now i have used the same PCB for 50MHz. It has a balanced mixer in the form of a NE602 which suppresses the VCO better (40dB) than the original dual gate mosfet. The filter which comes behind it can be more relaxed to achieve the required 60dB suppression.
These CB transceivers can also be converted to other bands. 10 meter will not be a problem . Only change the PLL , display and encoder and re-adjust. For 40 meter it will be more difficult because you have to calculate a lot of resonant circuits, and then ofcourse put new windings on the inductors of the receiver and transmitter part.
Also, the signals received on the 40meter band are much larger and maybe the frontend can not handle these.
I also plan to put this PCB in a Major M588 which is already converted to the 70MHz band.
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