[Fwd: LF: New Spectrogram 4.2.6]

Andre' Kesteloot akestelo@bellatlantic.net
Fri, 16 Oct 1998 07:39:16 -0400

Mike Dennison wrote:

> Johan, SM6LKM, wrote about a new version of Spectrogram, optimised
> for amateur radio use.
> I downloaded it from Johan's web site last night and can immediately
> say that it has yet again been substantially improved. The most
> obvious and useful change is a Dwell control in milliseconds which
> overcomes the main disadvantage of Spectrogram compared to similar
> systems. Instead of allowing only 40 seconds or so of display (enough
> for only one or two characters with a 3 second dot period), it can
> be adjusted up to several minutes.
> Not only does this allow the display of whole callsigns on one
> screen, (no more stop watches to determine whether you are looking
> at a 20s dot or a 60s dash!!) but the discrimination between random
> noise (such as static) and coherent signals is much better. I can now
> see a similar display of Loran lines to those seen by G3PLX and
> others, where this was rather interpretive previously.
> Now that we have an agreed (at least in the UK and possibly Germany)
> QRSS frequency, I hope to see more slow CW. I will definitely be
> transmitting more of it (though my coil caught fire last night during
> one of these sessions!).
> Over the weekend I will provide a link to Johan's site for
> downloading Spectrgram 4.2.6, together with some direct comparisons
> with v4.2.2.
> Mike, G3XDV (IO91VT)
> http://www.dennison.demon.co.uk/activity.htm