[Lf] [Fwd: LF: More Info? - Re: Strange signals on 25 Hz (!) - any info ?]

[Andre Kesteloot]

WD8ARZ wrote:

> A friend of mine had some interesting comments. Could those that are hearing
> these signals please comment on the locations where they are receiving from?
> Also what kind of receiver and antenna system if you dont mind. This has
> generated some real interest. Thanks
>
> 73 from Bill - WD8ARZ
> wd8arz at ix.netcom.com
>
> ----- Original Message -----
> From: "Leslie" <wa3qlw at bewellnet.com>
> To: "'Mike Miller'" <MMiller at hedstrom.com>; "WD8ARZ" <wd8arz at ix.netcom.com>
> Cc: "ROBERT M. SCHULTZ" <rschultz at idirect.com>; "'starrmorgan'"
> <starrmorgan at monad.net>; "Wayne Erickson" <weric at tir.com>
> Sent: Friday, June 21, 2002 16:30
> Subject: RE: Fw: Strange signals on 25 Hz (!) - any info ?
>
> 25 HZ is the frequency of the electric rail lines.  Penn Central had a lot
> of
> 25 HZ lines in operation until they tore down most of the over head lines
> and
> went all diesel back in the 70's.  They used to modulate the 'hi-lines' for
> track signals and even communications to the engines.  The engine
> communication
> was before a lot of VHF radios were installed.
>
> Where do these people who are picking this up live?  If near any type of AC
> rail line of the old style with the over head lines, chances are they are
> hearing that carrier with control signal modulation.  If they are far away
> then
> it is something else, maybe sub commands or who knows.
>
> I guess I'll have to fire up a amp with low frequency response and see what
> is
> out there.  If I hear anything then it is being transmitted through the air
> and
> not on rail hi-lines.
>
> I'm going to be heading to Dulce shortly.  The road was open the last I
> checked
> so it will be a 7 to 8 hour trip.  After I finish this mail, I'll be QRT
> here.
>
> I have the HF rig with me and will come up on 18.153 if I get a chance.
>
> Leslie