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Total 5 documents matching your query.

1. [TRLog] PTT output and 1000MP (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 08 Aug 2001 13:34:55 -0400; I am using the standard TR LPT port keying and PTT interfaces with a 1000MP Mark V (1K resistor to base of open-collector 2N2222, emitter to strobe line, open collector to plus of keying or PTT jacks; /archives//html/TRLog/2001-08/msg00033.html (7,256 bytes)
2. [TRLog] PTT output and 1000MP (score: 1): Author: tree@kkn.net (Tree N6TR); Date: Wed, 8 Aug 2001 10:41:28 -0700; Try putting the emitter to ground. The strobe pin will limit how much current can be sunk - and also result in a slightly higher "low" voltage. This could be the difference. Tree -- FAQ on WWW: http; /archives//html/TRLog/2001-08/msg00034.html (7,432 bytes)
3. [TRLog] PTT output and 1000MP (score: 1): Author: kl7ra@blizzard.gcgo.nasa.gov (kl7ra); Date: Wed, 8 Aug 2001 11:24:13 -0800; This will probably fix his problem, often it's PC LPT port dependent and another PC will work fine. The strobe is a good idea however as the program doesn't come up keying the radio PTT. I solved th; /archives//html/TRLog/2001-08/msg00035.html (8,002 bytes)
4. [TRLog] PTT output and 1000MP (score: 1): Author: tree@kkn.net (Tree N6TR); Date: Wed, 8 Aug 2001 12:32:08 -0700; Yup - I like the reed relay idea as well. I use one for CW and have no problems after 3 years. Tree -- FAQ on WWW: http://www.contesting.com/FAQ/trlog Submissions: trlog@contesting.com Administrativ; /archives//html/TRLog/2001-08/msg00036.html (7,134 bytes)
5. [TRLog] PTT output and 1000MP (score: 1): Author: n4zr@contesting.com (Pete Smith); Date: Wed, 08 Aug 2001 15:49:21 -0400; Not a problem at the moment because I use a printer switch to switch in the interface, and it is no challenge to switch to the interface position once TR's started and not before. 73, Pete N4ZR -- FA; /archives//html/TRLog/2001-08/msg00037.html (7,213 bytes)

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