QRP2000 synthesiser build

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

QRP2000Synth101

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

QRP2000Synth102

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.