Topband: New digital mode?

Rik van Riel riel at
Mon Oct 3 16:24:25 EDT 2016

On Mon, 2016-10-03 at 15:06 -0500, K4SAV wrote:
> I asked this question on QRZ and never got a good answer.  I am sure 
> many on this reflector know the answer to this question.
> What is the stuff on 1838 kHz that sounds like a continuous carrier
> with 
> no modulation. Looking at it on the band scope I can see some
> modulation 
> (I think) but it is very small and it is not discernible by ear. The 
> signal has a regular transmission length (maybe 1 minute, I didn't
> time 
> it). I know what PSK31 and JT65 sounds like but that is not what I
> am 
> hearing. 

You are hearing JT9.

The WSJTX software can decode both JT65 and JT9 at
the same time, if you select JT9+JT65 as the mode.

73 de AB1KW
All rights reversed

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