The CDG2000 Post Mixer Amp 2
This is a modification to the design
published in RadCom. In the original CDG2000, there were two ways in which the
transmit signal was generated. One was by means of a separate transmit ALC/filter
board that took DSB from an exciter, the other was a DDS /DSP design that
generated SSB directly at 9 MHz. In both cases the output was a 10 dBm transmit
signal at 9 MHz with inputs for ALC, drive power control and PA VSWR control.
You can see the original version here.
The DDS / DSP design is not yet published.
Here you will find a modified design for the receive post mixer amp and filters
that includes transmit SSB filtering, amplifiers, and ALC circuits.
For background information, refer to the
original version's overview here.
This is an updated PCB and schematic. For
the previous version look HERE.
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