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Tests tonight proved that it is excellent on 70 MHz, but I've not had it working on 6M so far. Maybe the problem is with my up converter, so posting this to ask if anyone else has tried it.
this is limited by the internal VCO and the size of the divider chain in the PLL.
LimeSDR (see other thread) will do 50 MHz and 3.4 GHz out of the box and they
(Lime) have plans for an extender board that will also add 5.8 Ghz and 10 Ghz.
I was lying in bed this morning thinking it wouldn't be too difficult to design an
extension board to add 50 MHz, 3.4 GHz and 5.8 Ghz to the board but it
probably isn't worth while as the demand would be too small.
so I am looking at it as a personal project for the moment.
I am considering using a Hittite (Analog Devices) 9 GHz VCO.
They do one with /2 and /4 outputs which would be suitable for use on
10 GHz / 6 GHz and 3.4 GHz with a 1 - 2 GHz output from Express.
I am not sure how practical adding 10 Ghz would be as current cheap off the
shelf mixer chips only go up to around 6 GHz. 10 Ghz would probably have
to use a Teflon PCB and microstrip mixers and filters.
I already have a ADF41020 evaluation board (contains an 18 GHz PLL and uses an external VCO)
to play with.
It is all up in the air at the moment though and I am open to suggestions.
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