use of Videography

[Andre' Kesteloot]

Peter Dodd wrote:

> Attached File: 3YXM9-1.GIF
>
> Hello Andre'

[...]

> Loran is a different matter. I have attached a file which shows G3YXM
> in QSO (using fast CW) with a PA0 station, the PA0 is just audible
> but as you can see it is only the same strength as one of the Loran
> spectral lines. I am located 150 miles on a sea path from the Loran
> station at Lessay
> Most of these lines have a 'keying' rate that makes it look like slow
> morse so if you are trying to dig a very weak signal out of the noise
> with the spectrogram it can be difficult in the presence of Loran sidebands.
> You can site the slow CW between two of the Loran sidebands but this
> requires a bit of planning. On the other hand a slow CW signal with a
> bit of frequency drift shows up well in the presence of frequency
> stable Loran sidebands.
> --
> Regards, Peter, G3LDO
> <g3ldo@zetnet.co.uk>