Topband: K1N DQRM Tracking Project

[Tom W8JI]

> You/re right of course, it's 1 ft/nanosecond. Don't know what I was
> thinking.  I was also focusing on CW DQRM,  since that is 99% of what I
> operate, and since carriers and CW jamming havw been endemic on the 
> Navassa
> dxpedition's top band and 80m operations. I agree that for SSB 
> interference,
> the concept would be harder to implement since there would be no sharply
> defined turn-on time for the interference at the receiving stations.
>

There is no sharply defined turn on time for CW, either. These people are 
not transmitting multi-kilowatt LORAN pulses that are 100 kHz bandwidth 
through highly efficient antenna systems.

What is being proposed is not that much different than LORAN, except now the 
signal level is in the noise and does not have a well-defined transition 
point in any mode.

The S/N at each site would determine when any given site detects a change.

I'm afraid anything affected by strength is a waste of time. We'd be doing 
well to get within 200 miles.

The sites might be able to look at signal phase, but it seems to me 
directional detection at each site would be far easier, more accurate, and 
more reliable. From here looking at phase differences between antennas using 
an NCC-1, I can get within about 2-3 degrees compass heading. The 
calibration process is tedious.

I'm sure I could do that or better with a specialized small antenna system 
that would remain calibrated for a very long time.


73 Tom