[Hallicrafters] LORAN - was: Why I'm a Hallicrafters Guy

[Howard Weeks]

It was multi-channel data - could be up to 16 channels of it on one carrier.
Run a lot of it for the mil back in the 60s - 70s.
Howard Weeks
Harlem, GA
K5JCP
----- Original Message -----
From: "Marshall M. Dues" <mmdues at hal-pc.org>
To: "Charlie" <pincon at erols.com>
Cc: <Hallicrafters at mailman.qth.net>
Sent: Tuesday, May 03, 2005 1:26 AM
Subject: Re: [Hallicrafters] LORAN - was: Why I'm a Hallicrafters Guy


It could not have been LORAN (LOng RAnge Navigation) because it was
heard on many frequencies in the 3-30 megacycle HF spectrum, and LORAN
at that time operated in several segments of the 160 meter band only.
That's why we had power limitations that were different for daytime or
nighttime, and the power limits were different for different locations
in the US.  When I moved from Michigan to Houston, Texas in 1969, there
was an operating LORAN station on Galveston Island on the Texas gulf
coast.  In later years, the new LORAN-C operated in the VLF spectrum on
a frequency of exactly 100 Khz.  Microprocessors, memory chips,
software, and small packaging allowed LORAN Navigator set to be
practical in small aircraft instrument panel installations.  I put one
in my homebuilt plane years ago.  They still are being used, but GPS is
the superior navigation computer system used in aircraft today.

You are right about the sound being like a B-29.  I always imagined I
was hearing a four engined bomber like a B-17 or B-24 as a child in
Clio, Michigan, before I became a novice. Short wave listening on the
family Philco floor radio revealed this phenomena to me in the '50s.

No one has commented on or challenged my diathermy machine theory, yet.
Does anyone have anything to support that.  I remember Hurley Hospital
in Flint, Michigan had diathermy machines.  They were RF devices used to
heat body parts in medical testing.  I doubt the FCC had radiation
restrictions on that kind of equipment at that time, though.  The
signals were all over the HF spectrum.  And when people began getting
TVs in the '50s, you would get herringbone patterns on the picture tube!
What an aggravation that was!

Regards,

Marshall Dues, WB5MYO
Katy, Texas (near Houston)



Charlie wrote:
> I'm tellen ya, that's LORAN....  Sounds like all four engines on a B-29
> running ever so slightly out of sync.
>
> Charlie k3ICH
> ----- Original Message -----
> From: "David Hollander" <n7rk at cox.net>
> To: "Todd, KA1KAQ" <ka1kaq at gmail.com>
> Cc: <hankarn at pacbell.net>; "Jim Brannigan" <jbrannig at optonline.net>;
> "Langston, Mike" <MLangston at hcpriceco.com>;
<Hallicrafters at mailman.qth.net>;
> "Gary Pewitt" <n9zsv at cei.net>
> Sent: Monday, 02 May 2005 11:55 AM
> Subject: Re: [Hallicrafters] Why I'm a Hallicrafters Guy
>
>
>
>>The airplane noise I am referring to was not the woodpecker. I remember
>>the woodpecker too well tearing up 20 meters while trying to work DX
>>over the pole in the evenings.
>>
>>Would still like to know what it was. It sounded like the continuous
>>roar of an airplane engine.
>>
>>Dave N7RK
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