Sounds like a buffer size issue to me. Have you set the FA-66 buffers to minimum? What Audio Buffer size are you using in PowerSDR?
Eric Wachsmann FlexRadio Systems > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > radio.biz] On Behalf Of Steve Kallal > Sent: Saturday, June 02, 2007 6:40 PM > To: FlexRadio@flex-radio.biz > Subject: [Flexradio] Scratchy CW sidetone when using a bug? > > I have a Vibroplex bug that I've been using with the SDR-1000. The problem > is a scratchy sidetone. This same bug does NOT has a scratchy sidetone on > my > ICOM 756 PRO II. It didn't sound scratchy on 746 PRO at my local HRO > store. > A local friend of mine did NOT hear scratchy dits on my signal when I was > using the SDR-1000 with this bug. > > If I set the ramp in setup up to 20 ms or higher (25 is the max), most of > this goes away. I don't have the problem on the built-in keyer via the > rear > jack unless I reduce the ramp to a real low value. > > The bug is connected to a COM port built into my PC. I also can use a > straight key on the COM port. It doesn't sound scratchy unless under > normal > use, but will sound scratchy if I lightly tap it. > > I operate no faster than 16 wpm. I don't know how a high ramp value will > affect the transmitted waveform. I don't want to use a high ramp value > just > to make the sidetone sound more pleasant. > > I suspect the overwhelming number of CW ops use a keyer, either internal > or > external, with the SDR-1000. Again, the scratchy sidetone is NOT present > on > a couple of ICOM rigs. I suspect is has more to do with the quirks of the > SDR-1000. It is rather annoying. I'd like to solve this one. How do I know > if it is really the bug or the rig? Perhaps I want to use a separate > sidetone separate from the one in the rig. > > BTW, I am using the FA-66 sound card at 48000 (mostly for better DSP > options > such as sharper filters). Changing the sample rate doesn't seem to make a > difference. The PowerSDR version is v1.8.0. > > 73, > > Steve N6VL > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: http://mail.flex-radio.biz/pipermail/flexradio_flex- > radio.biz/attachments/20070602/a748e724/attachment.html > _______________________________________________ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ > FlexRadio Knowledge Base: http://kb.flex-radio.com/ > FlexRadio Homepage: http://www.flex-radio.com/ _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Knowledge Base: http://kb.flex-radio.com/ FlexRadio Homepage: http://www.flex-radio.com/
