I'm curious what hardware interfaces people are using these days for PTT for soundmodem? So far, the old computers I use for aprsdigi are still old enough to have a parallel port so I use a 2n2222 PTT setup, but pretty soon that's no longer going to be the case. A long time ago I tried the VOX-based PTT ckt but was not successful with it. 73 de N2YGK
Gary Huntress wrote: > Thanks to everyone for all the replies. I definitely needed to change the > permissions on the xastir binary, that helped. The permissions on > /dev/soundmodem0 were already 777 so I didn't do anything with that. > > FWIW, on the same box, I'm running an XP virtual machine with soundmodem and > it is receiving. I shut down that VM and switch to Ubuntu and I'm not > getting anything. I have to assume it's something with ALSA, the various > capture devices, or mixer settings. > > Thanks for the help. I may just switch to a hardware TNC if I can find a > decent one supported by linux! > > Gary H. > KB1QOJ > > > On Sat, Dec 6, 2008 at 2:49 AM, Andrew Errington < > [EMAIL PROTECTED]> wrote: > > >>> I suspect if a few of us who have set it up before got together and >>> wrote a step-by-step on the Wiki, we'd be able to keep it up to date from >>> then on. I've got many years under my belt with AX.25 on Linux (KISS >>> TNC's attached to real serial ports). I've only done >>> soundmodem setups a few times and never set up transmit with it. >>> >> Crikey. I thought I was way behind the curve with a lot of catching up to >> do! I've been busy in the last couple of weeks. >> >> I built a radio cable using the parallel port to control PTT and I was >> very pleased when it actually worked. There were three issues I had to >> deal with: >> >> 1) Permissions on the soundmodem0 device. I mentioned how I solved this, >> but Curt has give the correct answer, which I will have to do. >> 2) I was using a handheld radio with PTT combined with the mic. signal. I >> had to put a capacitor in the line from the PC audio out otherwise PTT >> just pulled the audio signal straight to ground (many PTT circuits don't >> show this). >> 3) Tweaking the sound mixer settings to coax the audio driver to work >> properly. For some reason the mic. input on the laptop doesn't work >> unless I turn the mic. boost switch on then off again. I knew this was an >> issue on this laptop as I have the same problem with Skype. >> >> After that it Just Worked. Thanks to the XASTIR dev. team for much >> coolness. >> >> 73, >> >> Andrew >> ZL3AME >> >> _______________________________________________ >> Xastir mailing list >> [email protected] >> http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir >> >> > _______________________________________________ > Xastir mailing list > [email protected] > http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir > > _______________________________________________ Xastir mailing list [email protected] http://lists.xastir.org/cgi-bin/mailman/listinfo/xastir
