How will you get the shift correct? Doesn't have to be too exact but does have to be +/- 25% or so.
I was thinking about this while walking the dog - for a simple solution a SoftRock v6.3 would maybe a simpler / better hardware solution but you'll need more presky software :) Simon Brown, HB9DRV http://sdr-radio.com > -----Original Message----- > From: digitalradio@yahoogroups.com > > > 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" >
