Anthony,
In runs that short, RG58 is fine. If she's using a mag mount, trying to splice
onto the coax is more bother than it's worth. If she needs added length, a
barrel connector would do the trick. But, for a run of 12-15 feet, RG-58 is
perfectly acceptable, as the loss would be around only a DB at 440MHz.
For example, Beldon 8240 RG58u has an attenuation of about 4.5DB at 100MHZ and
10.5DB at 400MHz per 100 feet. If she has a fifteen foot ron, then she'd only
be losing 1.5DB, which is not that much.
Steve, K8SP
----- Original Message -----
From: "Anthony Vece" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Sunday, January 21, 2007 12:20 PM
Subject: Re: the antenna
My opinion, for what it's worth, is that I think you should cut off the =
original coax and put a solid piece of coax.
The coax should be in 9 foot increments.
RG58 is lossy enough and, if you add an extra piece with a barrel =
connecter and PL259 connecters, this may cause more of a loss and, =
possibly a mis-match.
But, that is just my opinion.
Hope this helps.
73 De Anthony W2AJV
[log in to unmask]
ECHOLINK NODE NUMBER: 74389
----- Original Message -----=20
From: Brett Winches=20
To: [log in to unmask]
Sent: Friday, January 19, 2007 7:27 PM
Subject: Re: [BLIND-HAMS] the antenna
The short coax may be a problem. Most of the dual benders are =
designed
with something like 17 feet of cable which helps in matching the
impedance. Try getting at least 10 feet in addition to the current =
feed
line and see what happens. Good luck. =20
=20
-----
BRETT WINCHESTER
[log in to unmask]
208-639-8386
###
=20
=20
-----Original Message-----
From: For blind ham radio operators
[mailto:[log in to unmask]] On Behalf Of Christy Schulte
Sent: Thursday, January 18, 2007 6:20 PM
To: [log in to unmask]
Subject: the antenna
I don't even remember the model, it's a dual band, brand new magmount =
I
got from Ebay. The cable running from it isn't all that long, so =
moving
it isn't really much of an option. right now it's sitting on top of a
metal filing cabinet, which is on top of a small dining room table, so
the bottom of the antenna is perhaps four and a half feet off the
ground. It's also directly by a window, not sure if that helps or not
but figured it can't hurt anyway.
I have neither the tools nor the knowledge to extend the cabling on =
it,
or I'd probably find some kind of way to get it even higher, and out =
of
easy cat reach. Unfortunately I don't have the cash to drop on the
talking meters, though that's a future plan for sure. Anyway, for now
i'll just stay off 440, my next project, probably even before getting =
an
HF rig, is getting an accessible HT. Actually two, since I'm hoping my
roommate will get her license soon.
-----Original Message-----
From: For blind ham radio operators
[mailto:[log in to unmask]]On Behalf Of Louis Kim Kline
Sent: Thursday, January 18, 2007 5:52 PM
To: [log in to unmask]
Subject: Re: Handihams, was: RE: exam
Hi.
That's why I asked what antenna she is running--it doesn't square with
my experience either, suggesting that maybe she is using a design that
is a poor radiator on 440.
73, de Lou K2LKK
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