OK GUYS:
The complete name of the company is:
Joslyn Electronic Systems Corporation
Building N-1, Sppokane Industrial Park
Spokane, Wa 99216
(509) 922-0483
(509) 922-0686 fax
The catalog I have lists a 3 wire, 120,240 volt, 120 volts each line to
neutral model 1250-33.
specs: Surge current: 10,000 to 20,000 amps on lightning waveform
of 8 to 20 microseconds rise time (this is
a pretty close spec to nominal 50% probability
lightning waveform and current)
Life expectancy: heavy duty units 2000 operations of 10,000 amps
no mention of life of medium duty units, but
I'm sure its sufficient
Load Rating: Unlimited (these things are in parallel with AC
line so no current flow except during, you
know)
We have used these things in our outdoor electronics for years, I've
only seen 1 go and that was when a 60 kv conductor dropped on a 12 kv
conductor which supplied power to a transformer that fed our stuff. The
arrester smoked, the electronics didn't.
Make sure your power service entrance has a good ground and that the
ground is bonded to the neutral bus in the box. Oh yeah, if you don't
have room in the box, some models of arresters are weatherproof and can
mount on the outside of the box, leads pointing in.
Water pipe ground is not sufficient unless you can assure yourself that
at least 20 feet of metal pipe in soil is available.
The two most used answers by your friendly electrical protection
engineer here in Sacratomatoe are: NO and GROUND IT.
Hope this helps,
Eric NV6O
edwoods@pacbell.com
>From DFREY" <HARRIS.DFREY@IC1D.HARRIS.COM Thu Aug 25 14:28:08 1994
From: DFREY" <HARRIS.DFREY@IC1D.HARRIS.COM (DFREY)
Subject: 9A1A QSLs
Message-ID: <QCY2.DFREY.6148.1994 0825 0828 0828>
Subject: Obtaining QSLs for 9A1A contacts.
Use Box 108, Zagreb, Croatia 41000 or via 9A3RA.
Please distribute this information as much as possible!
Yes, K4XU was an operator there, but is in no way responsible for
QSLs. I have a few, but I have no logs nor any desire to get into
the qsling business after making 10K QSOs under my own call. (90%
of which are being answered through the buro). They have their
own printing facility, and stacks of cards. The 9A buro does not
work well. At 6200 HrD for first class air and an exchange rate
of 6157 HrD/$, $1 will not get a fast mail return.
Dick K4xu dfrey@harris.com
>From peterj@netcom.com (Peter Jennings) Thu Aug 25 16:59:20 1994
From: peterj@netcom.com (Peter Jennings) (Peter Jennings)
Subject: Radials and Aluminum Wire
Message-ID: <199408251559.IAA28791@netcom11.netcom.com>
>
> Meanwhile, back at the rented beach house where I had my TS120S, I
> erected a 2 element 7 MHz fixed quad in a pair of tall palm trees using
> the aluminum wire, and oriented toward the mainland. Imagine my surprise
>
> Two days later, I sadly concluded, after observing that the bandwidth of
> the quad was greater than 500 kHz before the SWR exceeded 1.5:1, that the
> aluminum wire was doing a better job of heating the local environment
> than exciting the ionosphere. I also had my old Master Mobile whips, and
I am wondering if it was the palm trees that were more to blame than
the aluminum wire. I have found that palm trees have a much greater
effect on SWR when they are close to wire antennas than the redwoods
and firs I am used to dealing with here. Perhaps it was the trees that
were absorbing the RF and messing up the radiation pattern of the
antenna.
Peter AB6WM
------------------------------------------------------ peterj@netcom.com
FTP: ftp.netcom.com:/pub/VE3SUN
MagicKey 1.08, Beam 1.11, DTMF 1.01, AB6WM.gif 3-D QSL...
WWW: ftp://ftp.netcom.com:/pub/VE3SUN/www/home.html
Ham Mailing List list, FTP site list, 3-D stereograms...
|