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1. [RTTY] Opto Couplers ? (score: 1): Author: Robert Webb" <g0urr@btopenworld.com (Robert Webb); Date: Thu, 3 Jan 2002 14:24:58 -0000; Hi all and a Happy new year from sunny England. I have been building an FSK interface between serial port and 1000MP. All the designs i have seen use Opto Couplers but which ones ??. I have used a lo; /archives//html/RTTY/2002-01/msg00014.html (6,860 bytes)
2. [RTTY] Opto Couplers ? (score: 1): Author: jflanders2@home.com (Jerry Flanders); Date: Thu, 03 Jan 2002 10:32:30 -0500; I use 4n33's here. Different ones have different "gain". Put a voltmeter on the rig side to make sure it is taking the keying voltage sufficiently low. Compare it to the voltage when the Kam keys it.; /archives//html/RTTY/2002-01/msg00015.html (7,270 bytes)

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