Markers, etc.

[Ken G Kopp]

Hark!  I hear the silly police coming!

73! Ken - K0PP
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[Merv Schweigert]

Silly police heck,   I expect to see some of these names and call
signs in the next Darwin Awards.
I am sure that spark gap days are back,  but no one mentioned the
gap was between the ears.

Merv K9FD/KH6
> Hark!  I hear the silly police coming!
>
> 73! Ken - K0PP
>    

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[k6dgw]

On 12/7/2011 1:20 PM, Merv Schweigert wrote:

> I am sure that spark gap days are back,  but no one mentioned the
> gap was between the ears.

Well, actually yes.  I have a couple of Coast Guard friends from
Vietnam, and awhile back, one of them pointed me to a LORAN-C upgrade at
some of the stations.  The previous equipment was sort of standard
OSC->PA architecture using BIG tubes.  Many ran in the half-MW range,
the station at George WA was originally 1.6 MW.  After the "upgrade" it
was running 1.2 MW.

The upgrade replaced the TX with an Accufix TX from Megapulse.  No
tubes, no oscillators, no solid state amplifiers.  A bank of SCR's
discharged a large capacitor bank into a resonant circuit coupled to the
antenna.  [sound familiar?]  Other than a large adjoining room filled
with very high-tech control equipment, cesium clocks, and bunches of
software, it was basically a 1.2 megawatt, well controlled spark gap.
After the properly shaped pulse was formed, the rest of the damped wave
was eliminated by a circuit aptly named The Tail Biter.  Since the
antenna was part of the resonant circuit, the control circuitry included
an auto tuner that compensated for real-time antenna variations.

LORAN-C was shut down a couple of years ago, but some of the antennas
remain [mainly top-loaded monopoles].  I wonder if a KAT500 would be
able to load one on 160m?

73,

Fred K6DGW
- Northern California Contest Club
- CU in the 2012 Cal QSO Party 6-7 Oct 2012
- www.cqp.org


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[riese-k3djc]

WOW I would have loved to have seen that
once that power was produced how did they keep it on frequency,,, or was
it just
there but timed in sync wth everyone else,, I can see how it was turened
on / off
in time but not to keep on freqency,,,,

wild

Bob

On Wed, 07 Dec 2011 15:43:23 -0800 Fred Jensen <[hidden email]>
writes:

> On 12/7/2011 1:20 PM, Merv Schweigert wrote:
>
> > I am sure that spark gap days are back,  but no one mentioned the
> > gap was between the ears.
>
> Well, actually yes.  I have a couple of Coast Guard friends from
> Vietnam, and awhile back, one of them pointed me to a LORAN-C
> upgrade at
> some of the stations.  The previous equipment was sort of standard
> OSC->PA architecture using BIG tubes.  Many ran in the half-MW
> range,
> the station at George WA was originally 1.6 MW.  After the "upgrade"
> it
> was running 1.2 MW.
>
> The upgrade replaced the TX with an Accufix TX from Megapulse.  No
> tubes, no oscillators, no solid state amplifiers.  A bank of SCR's
> discharged a large capacitor bank into a resonant circuit coupled to
> the
> antenna.  [sound familiar?]  Other than a large adjoining room
> filled
> with very high-tech control equipment, cesium clocks, and bunches of
>
> software, it was basically a 1.2 megawatt, well controlled spark
> gap.
> After the properly shaped pulse was formed, the rest of the damped
> wave
> was eliminated by a circuit aptly named The Tail Biter.  Since the
> antenna was part of the resonant circuit, the control circuitry
> included
> an auto tuner that compensated for real-time antenna variations.
>
> LORAN-C was shut down a couple of years ago, but some of the
> antennas
> remain [mainly top-loaded monopoles].  I wonder if a KAT500 would be
>
> able to load one on 160m?
>
> 73,
>
> Fred K6DGW
> - Northern California Contest Club
> - CU in the 2012 Cal QSO Party 6-7 Oct 2012
> - www.cqp.org
>
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
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>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>

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