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Old 8th Nov 2017, 4:42 pm   #3
Bazz4CQJ
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Join Date: Apr 2009
Location: Oxfordshire, UK.
Posts: 4,935
Default Re: HRO 'Set Top Box'

Thanks Phil. I pinched the idea from a guy who had done something similar with an RA17 and wanted a DFM on it. That was some years ago and the DFM was made of individual ICs, so that alone took up most of the box. In my case the DFM is a module, so small, it takes ~1%?

I'm wondering what to do about the HRO's crystal filter; that is really only much use with CW reception. Considering the large volume it occupies, I think something more appropriate to AM/SSB reception could be done in terms of selectivity. Other than that, I'm leaving the RF and IF stages strictly as per original.

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