I was recently given a populated project board by Steve G0YXA. I boxed up the Howes XM1, frequency standard and recallibrated it.
The circuit is pretty simple.
![](http://2.bp.blogspot.com/_IPGAOU6e58s/Sna9gEFxwJI/AAAAAAAABRc/WS03BJ_9V84/s320/freqstandard.jpg)
The GQRP group have the HOWES project documentation and Tony/G4WIF will supply it upon request you you want to have a go at building one.
It makes the callibration of a homebrew RX dial so simple. I also used it to zero beat a homebrew TX to confirm the TX frequency.
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