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The audio out of the I and Q signals have a 24KHz bandwidth, but their relationship tell the PC if the signal is above or below the quadrature clock. Those two signals together represent a 48 KHz

I have,,, 'SomeWhere' a really good description of the Weaver ssb method. How, if at all, does that method compare with the softrock? (ok,,, I haven't seen that document in at least 6 years, but

If you shift the desired signal up or down in freq you would need to shift it back to its natural audio freq spectrum IF = 8330 kHz center of pass band Suppose SSB signl .3 - 2 kHz

Alex, Let me correct my e-mail concerning your crystals. I wrote that the 35.304 MHz crystal should work well, and then I calculated the results for a 35.4 MHz oscillator. What I should have said

The radio is simplicity itself, and it receives a band of signals that is 48KHz wide, it has only one oscillator, the rest is faked by the computer. The radio has two signals it puts out, I and Q

Hi Tony, Many thanks for the SoftRock kit. I have one from Round 3, and it has been working perfectly from the day I assembled it. Your comments on the crystal frequencies are appreciated. I will

Hi All, Question. Does Power SDR software provide a "Variable Beat or Carrier Oscillator"? Perhaps 2 ? What is the freq range of that oscillator ( up to 48 or 96 kHz ? ) 73 Rein W6/PA0ZN KD5NWA

Hi Alex, Your 35.304 MHz crystal sounds just right to me. It will probably oscillate at around 35.4 MHz in the SoftRock40 oscillator circuit. This would divide down to 8.85 MHz and the SoftRock

It would only let me see 6.5 KHz on one side. I'm going to try putting two crystals in parallel, and try to pull them so I can get at least 10 KHz on either side of the IF, the crystals are cheap

I ordered two crystals, 35.208 and 35.304 KHz, from Surplus Sales of Nebraska (http://www.surplussales.com) about a month ago, they are saying the crystals will arrive in a few days. The idea is to

Cecil, The crystal that is 17 kHz low would work well if you are meaning the crystal is 68 kHz low at its fundamental frequency. Seventeen kHz low even at its fundamental frequency would still

We are in the process of backing up and punting instead. I've been advised to move the crystal frequency of SR-40 by 12KHz on the low or on the high side, to get away from some of the noise in the

That is going to be tough, crystals at those frequencies are hard to come by, and if you want a custom frequency they end up costing more that the SR-40. The crystal oscillator I found it 2.2KHz on

Hi Cecil, In setting the frequency of the SoftRock to use it a a IF amp/demodulator you will want a frequency offset. For example if you are wanting to work with a 8.83 MHz IF then you want the

For people interested in using the SR-40 for dedicated purpose, I was nosing through the Mouser Catalog on line and they have for reasonable prices both crystals and little 3.3Volt oscillator modules

Have you ever read the best seller: http://www.amazon.com/exec/obidos/tg/detail/-/0517545160/qid=1127909371/sr=8-1/ref=pd_bbs_1/102-9832450-0868126?v=glance&s=books&n=507846 Just kidding. I love

I wound the coil this morning, left it on my desk, and then went out, meaning to solder it in place when I got back. When I returned it had disappeared. Babbage, my Burmese cat, had obviously come

Hi Leon, mine also arrived here in the UK on Monday. Put it together last night and all is working fine ;-) Regards, John g0orx/n6lyt

I put the lamp from Harbor Freight on my workbench, and I highly recommend it, I can now see the board and the parts clear as could be. The lamp is a circular florescent and the illumination is nice

Today I went shopping for a fine pair of tweezers and a light/magnifier glass for building the SR-40. I looked here, I look there, nothing worth spending $1 on, until someone sent me to Hobby Lobby, I