Fellow VHF contesters:
I'll join into the VHF/UHF contest begging....
The K3MQH group will again be on the air for this weekends
contest on 6, 2, 220, and 432 (all modes) from FM19. We are
located 15 north of Gettysburg, PA at 2200ft. We know its
not a rare grid but have been working hard the past year
putting up lots of long arrays, pre-amps and equipment on
the the 4 bands. We do have lots of power on each band, but
we have spend a lot of time working on the receive side also!
If you would like to make a sked, here are a few ways to get to
us:
call Name Phone DXCluster
----- ---------- ---------------- ---------
K3MQH Dick Ballou 717-292-7746 eve K3NA
N3KTV Jim Horton 301-258-9731 eve W3LPL
or you can send a note here horton_je%ncsd.dnet@gte.com
Good luck in the contest and we'll be looking for you!.
73,
Jim N3KTV
horton_je%ncsd.dnet@gte.com
>From modular!liddy!eric@cs.arizona.edu (Eric Gustafson) Wed Sep 7 19:53:00
>1994
From: modular!liddy!eric@cs.arizona.edu (Eric Gustafson) (Eric Gustafson)
Subject: No subject
Message-ID: <m0qiS7m-00009eC@liddy>
To: cq-contest@tgv.com
Subject: Re: surge arrester location
In-reply-to: <9409071545.AA02026@ns.PacBell.COM> (message from
arizona!pactime1.sdcrc.pacbell.com!EDWOODS on Wed,
7 Sep 94 08:45:12 PDT)
>
>I like the idea of mounting the surge arrester after the main breaker so
>that the breaker will trip when the arrester operates. This gives one a
>chance to know when the event happens and forces some situational
>consideration to the "problem".
>
Eric,
I'm prety sure that you don't want the main breaker to open when the
arrestor _operates_. You may, however, very well want the breaker in line
to operate if the arrester _fails_ (shorted). But...
For the breaker to open during a lightning fault when the arrester is
operating it would have to open far enough to quench the lightning arc to
be effective. Since this is impractical, it would simply mean the
destruction of the breaker. For this reason, the arrester is designed to
short during a fault, open immediately after the fault clears, and if the
arrester fails short, it is designed so that excessive power dissipation
inside the arrester causes a subsequent failure of the arrester to the open
state. Some even have an indicator to alert you to the fact that this has
happened. Most will take thousands of faults of average energy before they
fail to an open state.
So the proper place for the primary entry surge arrester is on the line
side of the breakers (may as well protect the breakers too).
73, Eric N7CL
P.S. I tried to respond off the reflector but my mailer extracted this
return address for you which apparently doesn't work for some reason:
arizona!pactime1.sdcrc.pacbell.com!EDWOODS
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Eric Gustafson N7CL | The mountains are high and the Emperor
6730 S. Old Spanish Trail | is far away.
Tucson, AZ 85747 |
INTERNET: modular!eric@cs.arizona.edu | You can't work 'em
CI$: 71750,2133 | if you can't hear 'em.
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