Sunday 14 November 2010

Picture Quality

As any readers of this blog have probably noticed one of my favourite modes of operation is PSK31. I have also dabbled with SSTV and modes like RTTY . I do listen from time to time on 3733 LSB where you can find the digital slow scan TV activity, this can be quite a busy frequency in the evenings.. I use the "Easypal" software to decode these pictures, unlike analogue SSTV, you never get a noisy or difficult to see picture , the digital SSTV either gives you a perfect picture or nothing at all. The software is more resource intensive than that for the other data modes and my "radio PC" with its old AMD 1.2 Ghz CPU struggles to run it, but just look at the results. The pictures take a little longer to transmit than standard SSTV and I always felt that the duty cycle was a bit harsh for the rig, particularly if I was to run 50 watts or more. Now I have the SRW linear I could run the rig at 10 watts and get 50-60 watts from the linear, that way I won't be overdriving anything and  I may try a few Digital SSTV QSOs of my own.

1 comment:

  1. I like PSK31 too, and a lot of other digimodes. I tried SSTV also, but only on 20 meter. I like that too. Have fun, 73 Paul