QRP2000 synthesiser build

I mentioned in Solder cream has a use-by date that a current project is another QRP2000 synthesiser.


Above, the topside of the synthesiser board. The optional output transformer can be seen at lower left.


And above, the underside.

Construction is a mix of through hole parts, and some SM parts. The Si570 is SM, and about 15 capacitors and links are on the underside.

The synthesiser is intended for a fixed channel receiver, and will be configured with a default frequency to generate at startup, so the USB connection is only used to configure / calibrate the synthesiser.