clansman 320d dds

@Eltimple The Clansman 320 is getting on in years and parts for the synth in particular impossible to find. Here I managed to replace all the problem areas with modern components.
An arduino nano controls a si5351 to bring the radio back to life with a display that i feel is respectful to the style of radio.The original 3h board , vco, is replaced with a si5351, clk0 supplies vfo+if to both vfo rx and vfo tx at a level of 200 mV. Clk1 supplies the carrier insertion osc signal at 1.75 mhz for USB at 200mV. this requires a filter to get a true sine wave before mixing. The arduino also supplies a 2khz tone for cw and tune operations.

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