[Discuss-gnuradio] Possible solution for a cheap RfFrontEnd?

[Carlos Miguel Limarino]

Hello, first please excuse me two things: my poor english and this dumb 
question. I'm very inteested in SDR and the approach of GNU/Radio, but 
since I'm starting on this I'm looking for a cheap hardware solution. My 
main problem ATM is this: I found an IF downconverter from 455 kHz to 14 
kHz ( 
http://www.tu-darmstadt.de/fb/et/uet/fguet/mitarbeiter/vf/DRM/fig/drmconv.pdf 
). This circuit was made by the Dream project for their DRM receiver, so 
it could work with GNU/Radio.

Is possible to use this circuit with any RF receiver? For example, this 
one could work: http://w1.859.telia.com/~u85920178/rx/tba120-1.htm .

Really, I don't understand the bandwidth implications here, so I think 
the problem maybe is with the downcoverter. My fear is that it doesn't 
use the full 44, 48 or 96 kHz bandwidth of the soundcard.

If this works, I think there's a great chance of making a cheap 
RfFrontend, because you can just use the inexpensive Elenco kit that 
Eric pointed in a previous post (however, I don't know the IF of that one).

Thank you very much for reading!