Re: [softrock40] Re: rxtx doesn't transmit
- Malcolm, Alan and all other SDR pros,I did as Alan and Malcolm suggested. I took the line out from the Sound Blaster and fed it into a boom box (I didn't have a speaker on hand). When transmitting in FM, there is a noticable hum but nothing when I switch back to USB. Does this mean that my SB is not driving the SDR and, hence, no signal?Any suggestion as to set up or, perhaps, the sound card is NG?Thanks for all the helpMarc, WB2MSCFrom: kosixsy <malcolmelevy@...>
Sent: Saturday, September 15, 2012 8:18 PM
Subject: [softrock40] Re: rxtx doesn't transmit
I just got mine going so here are some things to check.
Try Am or FM and see if you see a signal.
try Increasing sound card output into the SDR for tx
--- In mailto:softrock40%40yahoogroups.com, "mkatz_08852" <mkatz_08852@...> wrote:
> Hello guys,
> I completed the build and receiver works well.
> I can't get it to transmit, though. I am using HDSDR. When I click on transmit, the software behaves as though it is sending but a separate receiver and freq ctr don't receive anything.
> I set the two sound cards as Alan instructed (I think) with RX in and TX out going to the SB and RX out and TX in going to an inexpensive dongle.
> The current draw according to the power supply is around 50ma on receive and 120ma on transmit. According to the build notes, the 50ma is a bit high. The finals are not getting hot.
> Any ideas?
> Marc WB2MSC
- Does your sound card have any kind of "headphone expander" or other matrixing technology (like SRS)? These often cause crosstalk unless you can figure out how to turn it firmly *off*.-J.On 6 Oct 2012, at 06:38, "Brent G DeWitt" <bdewitt@...> wrote:
I agree. I’m just not sure how to kill it. Suggestions welcome!
Brent DeWitt, AB1LF