- 1. CW keying interfaces (score: 1)
- Author: ct-user@sttng.mlo.dec.com (Peter G. Smith)
- Date: Wed, 25 May 1994 12:12:19 -0700 (PDT)
- I just received an advert from a company offering a keying interface compatible with CT. They assert that if you are using an LPT port that the basic transistor/resistor interface is risky because th
- /archives//html/CT-User/1994-05/msg00054.html (7,748 bytes)
- 2. CW keying interfaces (score: 1)
- Author: ct-user@sttng.mlo.dec.com (ct-user@sttng.mlo.dec.com)
- Date: Wed, 25 May 94 15:52:21 EDT
- Pete, At hi pwr levels any xsistor-based switching system has failed here from time to time. The optoisolator trick is indeed the way to go. Keeping the RF out of the computer is a matter of keeping
- /archives//html/CT-User/1994-05/msg00055.html (7,564 bytes)
- 3. CW keying interfaces (score: 1)
- Author: ct-user@sttng.mlo.dec.com (Peter G. Smith)
- Date: Wed, 25 May 1994 17:11:24 -0700 (PDT)
- Hi Walt -- Well, the problem here isn't RF, but as someone reminded me, I haven't checked with a high-impedance voltmeter to find out just what is actually going on at the input to the interface. It'
- /archives//html/CT-User/1994-05/msg00058.html (8,450 bytes)
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