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1. [RTTY] Improved Pseudo FSK Keying circuit for 2Tone (score: 1): Author: "David G3YYD" <g3yyd@btinternet.com>; Date: Sat, 15 Mar 2014 10:30:24 -0500; The system of transformers, diodes and smoothing capacitors is far from ideal as proposed by the Fldigi team. The system proposed here costs less and has virtually no keying bias at all. It has very; /archives//html/RTTY/2014-03/msg00102.html (9,271 bytes)
2. Re: [RTTY] Improved Pseudo FSK Keying circuit for 2Tone (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 15 Mar 2014 11:09:06 -0400; Remarkably similar to the system used in microHAM DigiKeyer II except in DK II the monostable function is performed by the processor rather than a discrete circuit. 73, ... Joe, W4TV The rectifier sm; /archives//html/RTTY/2014-03/msg00104.html (10,327 bytes)

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