[LeArc] 440 Repeater
Gary L Adams
[email protected]
Sun, 31 Aug 2003 11:50:34 -0500
Jay:
I have not noticed any signal deterioration of the 06 signal in Canton.
Some simple test equipment could be used at the 06 site to measure SWR,
return loss, Z,etc. I would think if the SWR looks good and the signal
strength out a ways seems normal, the feedline and ant are ok. Heliax
has a very long life. It is true lightning could blow a hole in the
cable with a direct hit, but the signal strength would go down and the
SWR would go up, especially after a rain. The same is true of the
commercial Sinclair ant. They either work or they don't. If lightning
had damaged the Sinclair, the SWR and signal strength would change
considerably. Perhaps in this case, "if it ain't broke, don't fix it."
My observation over the years is lightning comes in on the phone lines
and AC power lines more that it comes down the feedline from the ant.
Polyphasers do a very good job protecting equipment from anything coming
down the feedline. A good UPS should have surge protection built in and
protect equipment from a strike on the AC line. Polyphaser, Transtector,
and I hate to admit it but even a Radio Shack device (43-111 I think it
is) will give phone line protection. Most of the protection equipment
works only if there is a good ground on the device. Most surge and spike
protection equipment for AC and phone lines plugs into a U ground AC
plug. If the plug does not have a good ground, the surge/spike device
will not work. As a friend of mine learned after 4 of his rptrs went
down, even a fairly new commercial building often does not have an
adequate AC service ground. Naturally, if the service ground it poor,
the best surge/spike protector won't work.
Gary
On Thu, 28 Aug 2003 23:06:50 +0000 Jay Hainline <[email protected]>
writes:
> See http://www.qsl.net/learc/ for club information.
>
> Membership Dues are due.
>
>
> Next club meeting July 8 at 7:00 PM.
>
> Please join us on Sunday Evenings for the
> Lamoine Emergency ARC Sunday Evening Net.
> Net time is 8:00 PM local time.
>
>
> I concur Gary. We need to be able to maintain what we have. We
> probably need
> to replace the hard line and antenna on the .06 machine for that
> matter as
> it has been up for several years now and probably has had numerous
> lightning
> strikes over the years. That will be a substantial price that the
> club
> probably cannot afford. We need to look more deeply into what we can
> do and
> discuss it at the next club meeting.
>
> 73 Jay
>
> Jay Hainline KA9CFD EN40om
> Colchester, IL
> [email protected]
> http://www.qsl.net/learc
>
> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On
> Behalf Of Gary L Adams
> Sent: Thursday, August 28, 2003 16:52
> To: [email protected]
> Subject: Re: [LeArc] 440 Repeater
>
>
> See http://www.qsl.net/learc/ for club information.
>
> Membership Dues are due.
>
>
> Next club meeting July 8 at 7:00 PM.
>
> Please join us on Sunday Evenings for the
> Lamoine Emergency ARC Sunday Evening Net.
> Net time is 8:00 PM local time.
>
>
> Jay:
>
>
> Glad someone in the Macomb area has realized the 444.300 machine has
> a
> problem. The signal has gone down when it rains for years, but the
> problem
> is even worse now than it was.
>
> I realize one of the problems of old age is "I remember when...."
> The 70cm
> machine was put in as a back up for the 06. The 300 is there, paid
> for, and
> could work well if the ant and/or feedline was any good.
> Instead for talking about getting another 06 machine, a new site, or
> another
> freq, which I doubt is possible any more on 2M, why not solve the
> problem
> with the 444.300? Wouldn't that be easier and cheaper? A new ant
> doesn't
> mean a Diamond, Comet, or a Ringo! At that height, something
> substantial
> and bullet proof is needed. Folded dipoles seem to be less subject
> to
> lightning than other types of ant. Something like a Decibel
> Products DB420
> is an excellent antenna.
>
> Since the 300 ant is not as high, the rptr runs less power, and the
> freq is
> higher, the coverage is not going to be as great as the 06, but it
> should
> cover the county except for the low places, such as a river bottom.
>
>
>
> Gary, N9GA
>
> ________________________________________________________________
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>
> Lamoine Emergency Amateur Radio Club
>
> W9SSP - 147.060 (103.5 tone)
>
> WB9TEA - 444.300
>
> Meetings on the second Tuesday of the month.
> 7:00 PM at the American Red Cross Building in Macomb.
>
> Next meeting will be December 10, 2002.
>
> Hope to see you there.
>
>
> LeArc mailing list
> [email protected] http://mailman.qth.net/mailman/listinfo/learc
>
>
> _______________________________________________
>
> Lamoine Emergency Amateur Radio Club
>
> W9SSP - 147.060 (103.5 tone)
>
> WB9TEA - 444.300
>
> Meetings on the second Tuesday of the month.
> 7:00 PM at the American Red Cross Building in Macomb.
>
> Next meeting will be December 10, 2002.
>
> Hope to see you there.
>
>
> LeArc mailing list
> [email protected]
> http://mailman.qth.net/mailman/listinfo/learc
>
>
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