[Hallicrafters] Noise on 40 meter band?

[lrlayton at cox.net]

I have often heard a sweeping signal over the past few years on various frequencies on  HF. Most often between 4.5 and 5 MHz, but it does seem to move around quite a bit. I believe this is related to the ROTHR radar system operated by the US Navy on the US east coast and Texas, but I could be wrong. The "woodpecker" was a former Russian radar system.

Other over the horizon radar systems that use the HF bands may currently be in operation by Australia, France and  Russia.  



Les Layton
Las Vagas NV


 
---- Jim Liles <james.liles at comcast.net> wrote: 
> Not often on the air except to test a radio, but noticed a sweeping signal on the 40 meter band from about 7.1 MHz to 7.4 MHz.  It's not the radio because we fired up the spectrum analyzer and it is a sweeping signal.  The woodpecker of the past allegedly was caused by HF over the horizon radar which I haven't heard for years.    Anyone know what this manifestation is?  Kindest regards Jim K9AXN
>