47379Re: [softrock40] Re: Rocky not tuning the Si750
- Sep 1, 2010
----- Original Message -----
Subject: [softrock40] Re: Rocky not tuning the Si750
> The on board soundcard on this PC is "somewhat lacking" to say the least.
> The single biggest problem, is leakage of the recovered audio, back into
> the Line Input, resulting in some interesting noises at times (at great
> volume too!) Yes, I've explored all the mixer settings, and disabled all
> the "stereo mix" features etc.
I find it difficult to believe it is really that bad!
> Next stage, to figure out, which side to put the LO, for the 60m beacons,
> with Rocky I can play now, then order the correct crystal for the
> rockbound SR Lite II, releasig the V9 for other duties.
I presume you are using the G3PLX software? It uses 8Khz sampling so it will
need to be 5.290 +/- about 1.5KHz. Either side is possible but high avoids
QRMing the WSPR frequencies.
> In the mean time, I need to sort out a decent sound card to get the noise
> down, and gain up! Also, get the thing in a screned box, with the audio
> (IF) lead decoupled to RF. At the moment, I've got all sorts of odd
> signals with no sideband rejection,
Is it stereo? You will get no rejection if it is not. I would have thought
the USB Creative would have worked, what is it? A SB24 Live? There should be
a W2000 driver.
73 Alan G4ZFQ
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