David, I think you have oversimplified the two components to make the 10.7MHz tap. As best I can tell the two components are a good but expensive start. They produce an output with 700kHz offset and would still need a further translation to get the soundcard range. That is unless you have found parts at those two sources that I was not able to find. Besides, the Softrock at less than $20 dollars is hard to beat price wise.
Cash ----- Original Message ----- From: "David" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, September 21, 2007 7:30 AM Subject: [soft_radio] An inexpensive IQ SDR Option - up to 192KHz > For those of you that have another radio with a 10.7MHz IF tap, here's > another SDR option. > > Mini Circuits (www.minicircuits.com) makes fairly inexpensive IQ > demodulator modules. For $89, you can get a small module that has 2 > inputs - RF and a 10MHz reference frequency, and I and Q outputs. > > You can get an inexpensive 10MHz reference frequency from AADE - $39 > for the board or $49 with the enclosure. > > Hook the I and Q outputs to your soundcard and instant SDR!! > > I am using this setup with my AR5000A and it works GREAT. I had to add > a low noise amplifier to the IF output to get the signal up out of the > noise - I used an ICE 130B ($59) - it's rated for the entire HF range, > but is very low noise and works very well. I am using a E-Mu 0202 > external USB soundcard ($150) - it will do up to 192KHz sampling. So > with this setup I can tune up to 96KHz on each side of the frequency > the radio is set to. > > > > > Yahoo! Groups Links > > > > > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.487 / Virus Database: 269.13.27/1020 - Release Date: > 9/20/2007 12:07 PM > >
