开云体育

SBITX v3 - Ability to use a Headset for phone modes

Paul #109902 Latest update: Replaced Jabra headset with a UGREEN branded usb sound card that takes 3.5mm jack inputs for speaker/microphone. Using a splitter to allow the usual 3.5mm TRRS connection from a pc headset, connected a Nuroum branded headset I picked up off Amazon for use with my Freedv ezDV module and tested again. Volume control worked as expected, didn’t with the Jabra headset. Mic gain control worked as expected and indicated value changed as expected, didnt with the Jabra. The moral here I think, is to use a USB sound card and a splitter to allow connection of 3.5mm terminated pc headsets rather than a USB specific headset based on this test, for me anyway, others may have different experiences depending on the headset used. Next steps now to see if I can get a better power to voice ratio now as not getting expected power out of the radio on SSB, probably only peaking about 5w which is way short of the expected 25w peak. Not bothered about getting the full 25w but defo want more than 5w out for SSB operation. Now to start testing Gordon’s modifications to see how they improves things regarding frequency response. Regards Paul
Gordon Gibby KX4Z All Messages By This Member #109906 Regarding the SSB peaks.? ? I haven't put this on an oscilloscope -- and won't know until I do -- but i have always felt the analog-measured average powers when speaking into a microphone? were very low. Especially on Upper side band -- and the reason for that is asymmetry?in the crystal filter....fixed by simple coding that I added.? ?In my case, adding a multiplier of 1.4 to the upper side band worked fine (adds 3 dB to output power). I also raised the "clipping level" somewhat; it appeared that Ashhar had empirically set that, and I'm sure he did the best he could.? ? It may vary by different voices.?? When I adjusted these various values, voice seemed to work pretty well.? ?And I can?drive the SB-200 amplifier to a few hundred watts output with the radio and the?opto-coupled output relay signal that I developed. ALC: I have managed to? demonstrate?real action of the ALC software by reducing its cut-in point down to where I could see it take effect.? ?I think my zeners on the gates may be limiting my output but until I changed things, I never saw the ALC drop below 1.0000.? ? So some learning still to be done on my part there.? ? These values will be different on units?set for 25 watts output?versus mine, which is a 40W unit with the older MOSFET design. Since I do a good bit of digital, using FSK modulations as well as PSK modulations, I like to confirm that a signal is indeed getting out!? ?? Gordon KX4Z toggle quoted message Show quoted text On Mon, Mar 18, 2024 at 5:19?AM Paul <g0kaohx@...> wrote: Latest update: Replaced Jabra headset with a UGREEN branded usb sound card that takes 3.5mm jack inputs for speaker/microphone. Using a splitter to allow the usual 3.5mm TRRS connection from a pc headset, connected a Nuroum branded headset I picked up off Amazon for use with my Freedv ezDV module and tested again. Volume control worked as expected, didn’t with the Jabra headset. Mic gain control worked as expected and indicated value changed as expected, didnt with the Jabra. The moral here I think, is to use a USB sound card and a splitter to allow connection of 3.5mm terminated pc headsets rather than a USB specific headset based on this test, for me anyway, others may have different experiences depending on the headset used. Next steps now to see if I can get a better power to voice ratio now as not getting expected power out of the radio on SSB, probably only peaking about 5w which is way short of the expected 25w peak. Not bothered about getting the full 25w but defo want more than 5w out for SSB operation. Now to start testing Gordon’s modifications to see how they improves things regarding frequency response. Regards Paul
JJ - W9JES All Messages By This Member #109910 On Mon, Mar 18, 2024 at 04:19 AM, Paul wrote: Latest update: Replaced Jabra headset with a UGREEN branded usb sound card that takes 3.5mm jack inputs for speaker/microphone. Using a splitter to allow the usual 3.5mm TRRS connection from a pc headset, connected a Nuroum branded headset I picked up off Amazon for use with my Freedv ezDV module and tested again. Volume control worked as expected, didn’t with the Jabra headset. Mic gain control worked as expected and indicated value changed as expected, didnt with the Jabra. The moral here I think, is to use a USB sound card and a splitter to allow connection of 3.5mm terminated pc headsets rather than a USB specific headset based on this test, for me anyway, others may have different experiences depending on the headset used. Next steps now to see if I can get a better power to voice ratio now as not getting expected power out of the radio on SSB, probably only peaking about 5w which is way short of the expected 25w peak. Not bothered about getting the full 25w but defo want more than 5w out for SSB operation. Now to start testing Gordon’s modifications to see how they improves things regarding frequency response. Regards Paul I am using this headset and it works fine with my app.?? I will include a write upon the proper use of the app when it is added to sBITX Toolbox. -JJ
JJ - W9JES All Messages By This Member #109917 On Sun, Mar 17, 2024 at 06:46 AM, HA3HZ wrote: If I understand correctly, this USB Audio can be part of the sBitx-ToolBox. -- Gyula HA3HZ Yes, that is the plan when I get around to releasing it. My family and work life have been taking priority at the moment. -JJ
JJ - W9JES All Messages By This Member #110243 USB headset is now part of the toolbox.?? /g/BITX20/message/110242? Enjoy! -JJ
HA3HZ All Messages By This Member #116544 Don't stick to a headset with a famous brand name, they usually don't work for this purpose. I decided to buy a good working headset that has worked well for others. It's true that its name doesn't appear in alsamixer, and all the switches and sliders work fine. Thanks to JJ for that, which he wrote in message? #109910?? ?. Yes, the important thing is that there should be no error messages. -- Gyula HA3HZ ?

Previous Topic Next Topic