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Re: LF: satellites/RadCom

To: <[email protected]>
Subject: Re: LF: satellites/RadCom
From: "Graham" <[email protected]>
Date: Sun, 20 Jul 2008 21:22:06 +0100
Importance: Normal
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Telstar ?

Some  bedtime reading  :-

G ..

From: "Andy Talbot" <[email protected]>
Sent: Sunday, July 20, 2008 6:52 PM
To: <[email protected]>
Subject: Re: LF: satellites/RadCom

Which big bang ? A few superpowers may have tested the occasional EMP
weapon with 'interesting' findings, but no one ever deployed one -
they all realised the potential for damaging thier own infrastructure
as well as the target's.  And contrary to all the popular sci-fi films
and myths of the era, a normal ground-burst or even air-burst of a few
MT does not generate damaging EMP.  It has to be a true exo-atmopheric
explosion at a height to do practically no other damage, and of a
mechanism yielding mainly high energy gamma / X-rays to generate the
necessary Compton scattering.

The  stories put-about back then were incorrect and partly propaganda,
but also genuine misunderstanding of the respective countries'
techology capabilities, and their modus-operandi

Andy  G4JNT

2008/7/20 mal hamilton <[email protected]>:
When the big BANG comes you will regret not having learned about
VALVES/TUBES and how to use them.
These have a good chance of survival when all the chips have FRIED and being
able to use a morse key a bonus.

----- Original Message ----- From: "Andy Talbot" <[email protected]>
To: <[email protected]>
Sent: Thursday, July 17, 2008 11:24 AM
Subject: Re: LF: satellites/RadCom

Two pijnts...
1)  Satellites
Having just joined Amsat (because I felt I 'ought' to) I'm less than
impressed with a) Oscar News which has had no technical content in the
two issues so far received, and b) The Amsat -UK web site.  In spite
of supposed to being able to log in I can't after several requests.
Seems there is nothing there anyway
So all in all, don't look to much from the UK Am satellite scene.

2)  Constructional articles
Radcom is always looking out for things.  My new column can continue
based on years of my own-experimentation and building in quintillions
of different subject areas from DC to pink light, digits and analogue,
but I would like input from others.   Anything that isn't yet another
wire antenna or a new H-Mode mixer, and certainly no valves would be
welcome; mid-range to upper end technology is preferred using
modern(ish, in amateur terms) devices.  Don't want to cover simple
basics, that is best left to Eamon and Ian in their columns.


Andy G4JNT

Andy G4JNT

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