On Mon, Dec 2, 2019 at 4:34 AM Black Michael via wsjt-devel < wsjt-devel@lists.sourceforge.net> wrote:
> Audio dropout like this is usually caused by the USB audio device > disconnecting. > And that is usually case by RFI. > I had a dropout problem where WSJT-X audio output would occasionally switch from the desired "Speakers (5- USB Audio CODEC)" to "Headphones (High Definition Audio Device)" when I had headphones plugged in to my Windows 10 desktop machine. This of course caused loss of transmitter modulation. Kind of a mystery, since I had only the USB codec selected as output for WSJT-X both in WSJT-X's settings Audio tab and in Windows sound settings; I don't know why Windows should ever take it upon itself to re-route that. I tried ferrites on the headphone cable to fix this. Ultimately lots of ferrites, including 10 turns through a 3/4" I.D. mix 31. (I already have chokes on everything else, and no RFI-like problems except for this.) It didn't help! But unplugging the headphones does eliminate the problem, so I now just forego watching Netflix while working FT8 :). Anyway, if you're having problems with TX audio dropout with Windows 10, try popping up the Volume Mixer to see which output devices are connected to WSJT-X; maybe the operating system has switched to using something other than the one you want. 73, Paul K6PO On Mon, Dec 2, 2019 at 4:34 AM Black Michael via wsjt-devel < wsjt-devel@lists.sourceforge.net> wrote: > Audio dropout like this is usually caused by the USB audio device > disconnecting. > And that is usually case by RFI. Chokes on USB cables (and all other > cables) usually solves the problem. > Ensure your ethernet cables are shielded too. Newer CAT 7 or CAT 8 cables > are already shielded. And ground your ethernet hub too (most don't have a > built-in ground) > I even put chokes on all my power lines going into the breaker box to > reduce what's riding on the power. > > And, if you have an outside round rod (like many I have helped) that is > not tied to the house ground either stop using it (and use the house > ground) or tie the outside rod to the house ground properly. That has also > solved many RFI problems. > > de Mike W9MDB > > > > > On Monday, December 2, 2019, 05:26:25 AM CST, Claude Frantz < > claude.fra...@bayern-mail.de> wrote: > > > On 12/1/19 10:46 PM, Frederic Beaulieu wrote: > > Hi Frederic, > > > I start to notice on my IC-7300's audio scope that occasionnaly, no > > audio was sent to the radio. The problem seems to get worse (more > > frequent) and now I'm seeing a kind of noise at the beginning of many > > of my transmission. Anyone knows how I could verify if it is a > > problem with my radio, the sound card (which is embedded in the radio > > I think) or the WSJT-X software? > This problem of occasional no audio output has been reported here by > various users, included myself. I have encountered it while running with > Windows XP and using Linux, on different hardware. I cannot remember > that an valuable diagnostic has been reported about the reasons of these > sporadic recurrences. > > Best wishes, > Claude (DJ0OT) > > > > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel > _______________________________________________ > wsjt-devel mailing list > wsjt-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/wsjt-devel >
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