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1. [WriteLog] Parallel Interface (score: 1): Author: kstover@willinet.net (Kevin Stover); Date: Fri, 06 Jul 2001 16:03:45 -0500; <html> Hello all.<br> In response to my last message it was suggested that I use an opto-isolator in the parallel interface to the rig to absolutely isolate the computer from the rig.<br> Can I swap; /archives//html/WriteLog/2001-07/msg00021.html (8,001 bytes)
2. [WriteLog] Parallel Interface (score: 1): Author: w1zt@mediaone.net (George Johnson); Date: Fri, 6 Jul 2001 17:47:07 -0400; Kevin, You could use the Comm port CW line and the 4N33 CW circuit to drive your level translator. But the LPT port is a TTL output (5 VDC and Gnd) and does not have sufficient "drive" current to dri; /archives//html/WriteLog/2001-07/msg00022.html (8,717 bytes)
3. [WriteLog] Parallel Interface (score: 1): Author: jbrannig@optonline.net (Jim Brannigan); Date: Fri, 06 Jul 2001 19:41:36 -0400; I go on step further and use a reed relay to key the radio. This way I have absolute isolation and can key solid state or tube rigs and not worry. I have been using the same serial keyer since CT day; /archives//html/WriteLog/2001-07/msg00023.html (9,918 bytes)
4. [WriteLog] Parallel Interface (score: 1): Author: kstover@willinet.net (Kevin Stover); Date: Fri, 06 Jul 2001 20:21:46 -0500; Thanks to George and Jim for their input. I'm thinking I'll just fix up the parallel port interface but install a second LPT in the machine. The cards are cheap and easy to setup. If something goes t; /archives//html/WriteLog/2001-07/msg00024.html (9,708 bytes)

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