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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*CW\s+keying\s+interfaces\s*$/: 3 ]

Total 3 documents matching your query.

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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