The minitiouner will not, as far as I know tune down to 71MHz. Plan is to up-convert to a higher frequency that the minitiouner can cope with better. It uses an ADE11+ mixer and a PGA103+ to provide some amplification if needed. I have added lots of pads to the board to allow flexible use with different filter designs e.g. low pass, high pass, band pass, band stop, all pass, no pass which would allow it to be used as a down-converter, a filtered preamp etc. Good RF design principles have largely been ignored so it's not going to work at very high frequencies.
The LO +7dBm comes from whatever, e.g. the ADF4351 as used in the Portsdown, or an SI571.
Is anyone else interested in this sort of thing or is it just me?
I completed the application form 12 months ago but have never had a reply from OFCOM so I thought I would have another attempt.
Has anyone managed to get a NOV for this band.? All my ATV gear uses 70MHz has the first IF and this could easily be moved up the band and amplified.
The consensus seems to be if you have not had a response from your original application you will need to reapply to Ofcom for a special permit. Once you have this, the 70MHz NoV is a simple on line application like 146MHz.
http://rsgb.org/main/blog/news/gb2rs/he ... mentation/
BTW - has anyone done the Field strength questimates required on the form?
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