[Scanner] Which Coax? Which mast?
Blake Bowers
[email protected]
Tue, 15 Apr 2003 23:04:54 -0500
For a scanner the impedance difference will have
no, or at least neglible effect. Scanners rarely
achieve anywhere near 50 ohms on their input
circuit anyways.
> why would you want to use coax that is 75 ohms??? when the normally used
> coax is 50 ohms.... Are you going to use an impedance matching circuit,
> etc...??? I think this will cause a big problem.... maybe i'm missing
> something here....
>
> Just my .02 cents
>
>
> Jonathan
>
>
> Jonathan D. Thawley ARS: KC8CPW, Extra Class
> 931 Elberon Ave ARMY MARS: AAR5MO
> Salem, OH 44460-3570 ARRL/VEC, W5YI/VEC, and W4VEC/VEC
> E-mail: [email protected] WEB PAGE: http://www.qsl.net/kc8cpw
> Age: 19
>
> ----- Original Message -----
> From: "Phil Atchley" <[email protected]>
> To: <[email protected]>
> Sent: Tuesday, April 15, 2003 11:45 PM
> Subject: [Scanner] Which Coax? Which mast?
>
>
> > Hi.
> > A friend is sending me a new RadioShack scanner antenna model 20-042,
> > apparently the same as the "Scantenna" to use with my Yaesu VR-5000
> > receiver. The antenna covers 30-1300MHz (it's about 7 feet tall).
> >
> > Any-who.... He is sending me about 65 feet of new RG-59 Coax to use
with
> it
> > (the coax type specified for that model with F connectors). I
anticipate
> > receiving this antenna by the weekend and putting it up this weekend
> > (weather permitting). A couple quick questions.
> >
> > 1. Coax? He's sending the RG-59, BUT I work part time at a TV shop
doing
> > stereo repairs. I'm sure I can get quality (hopefully) RG-6 TV coax
from
> > the shop. Is it that much better, particularly at a GHz or so than the
> > RG-59? I believe the impedance is the same.
> >
> > 2. Mounting location. I have two (actually have 4 here) different
masts
> > holding present antennas that I can put this sucker on. The one holding
> the
> > high end of the sloper is roughly 38 feet or so above ground (perhaps 26
> > feet above my sheetmetal roof) at it's top and can probably go about
> another
> > 5 feet up, BUT would require at least 50 feet of coax to reach it. The
> top
> > of the closer mast is only about 15 feet MAXIMUM above the roof but
would
> > only require a 20-25 foot run of coax!! IS THE EXTRA 11-16 FEET OF
> HEIGHT
> > WORTH DOUBLING THE COAX LENGTH OVER??
> >
> > 73 de Phil KO6BB
> >
> >
> > avast! (VPS 4/15/2003): the message contains no virus
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> >
>
>
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