A simple QRP Tx suitable for beginners, for example, is usually the ubiquitous 1 Watt 40m thing for CW that all the magazines and book seem include ad-ad-naueam, built into sweet tins or whatever novel box they can think of. I want to be different, and publish a design for RTTY. A simple varicap across a crystal, needing a bit of applied science with SSB Rx and Spectrogram prog to set the shift - all part of the basic learning process. But to do that needs a way of driving the Tx with a wire that just waggles 1/0 with RTTY data - just like the mechanical teleprinters of old. So long as it does it at 45 or 50 baud and is properly timed (perhaps not so easy using Windoze - could this be why there's nothing out there?)
I wanted to steer away from a design that linearly upconverted from a soundcard then filtered and amplified the result. The request was for "simple designs for beginners" Andy --- In digitalradio@yahoogroups.com, "Simon HB9DRV" <simon.br...@...> wrote: > > Andy, > > > > Can you be more specific about the design requirements? > > > > Simon Brown, HB9DRV > > http://sdr-radio.com > > > > From: digitalradio@yahoogroups.com [mailto:digitalra...@yahoogroups.com] On > Behalf Of AC TALBOT >
