Same stick Stefan
The layout is uff/vhf down convertor feeding 28
MHz A/D , every one started using HF to VHF convertors
, but they have a problem as the off set qrg approaches
'zero' in the oscillator starts to leak into the signal path
At first there was very little code data on the chips
, but some one managed to get the command listings and now ,
can turn the down-mixer off or make it idle - and with
connecting directly to the a/d , you now have a HF radio
you need to google to buy or for drivers etc ...
main chip set for dongle >>
RTL2832U + E4000 Amazon , etc but some
of the prices are now a bit silly , some of the HongKong
sellers are adding plugs and software
HDSDR
SDRSHARP
This is the dongle I modified for HF , you can see C2
, linked to pin 1 of the A/D , just connect to that ( if it was
a one way mod , you could remove the cap to isolate the a/d)
Good luck ! if it go's bang , then its £10 wasted ,
not $1000 !
73-G.
