Sunday, December 27, 2015

Codan 6924 Mk2 on 40m

Picked up a Codan 6924 Mk2 at Dural a few months back. Always wanted one of these lunchbox radios. The IF is 1650kHz so by feeding a 5450kHz signal from a bench VFO in to an empty crystal socket I'm able to tune 7100kHz (for example).

It sounds a bit wobbly, but it's a good start.

The next step is to put together a little DDS oscillator small enough to be mounted internally. I'm not sure if I should try one with multi channels or just make separate ones to replace crystals.

I've now got it receiving 40m quite well using a DDS VFO with programmable offset that I purchased on ebay last year and badly boxed up.

Tip: You power it on while holding the CAL button to set the offset.

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