[time-nuts] 1900kHz radiolcation testing on east coast US?

[EB4APL]

Taking in account that is is heard quite strong in most US and even in 
Toronto and that it sweeps in a fairly controlled way it is an 
intentional radiator.  It could be an ionospheric sounder or a sea waves 
measuring device of a new kind. I think that an interference so powerful 
must be discarded.
I don't receive it in Spain but I'm very close to several powerful MW 
broadcast transmitters and they can mask the signal due to saturation.

Ignacio EB4APL

On 08/12/2014 a las 2:41, Chuck Harris wrote:
> Hi Tim,
>
> Look for a switching power supply that is fairly new, and is
> of the sort that doesn't need to be messed with to cover the full
> 120V to 240V range.
>
> That sort of switcher is also known as a power factor correcting
> switcher.  It has a PWM switched pre-regulator that takes the
> unfiltered ripple straight from a full wave bridge rectifier, and
> PWM's it so that it can charge the filter capacitor, without the
> power line seeing anything but a resistive load.  It also controls
> the inrush current.
>
> PWM pre filters, because they quickly shift the pwm signal at a
> 120Hz rate, are capable of producing lots of broadband 120Hz
> modulated garbage if their shields, or filters are compromised.
>
> -Chuck Harris
>
> Tim Shoppa wrote:
>> Would any time-nuts know of radiolocation-type testing going on, on east
>> coast of US, maybe around Maine? There is a very strong wideband 
>> signal on
>> 1900-1920kHz, with a 120Hz substructure and a 4Hz rep-rate, likely 
>> megawatt
>> power range.
>>
>> Sound sample (recorded with 2400Hz receiver bandwidth, although the 
>> whole
>> signal is far far wider bandwidth) at
>> http://www.trailing-edge.com/1910-intruder.wav
>>
>> Pics of the waveform at 
>> http://www.trailing-edge.com/1910-intruder-1.png and
>> zoomed in at http://www.trailing-edge.com/1910-intruder-2.png
>>
>> Tim N3QE
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>