[Amps] use or not coaxial audio cable to transmitter's

[Jim W7RY]

This setup looks like a pirate radio station!

There, I said it.

73
Jim W7RY


--------------------------------------------------
From: "Jim Thomson" <jim.thom at telus.net>
Sent: Saturday, October 30, 2010 10:47 PM
To: <amps at contesting.com>
Subject: [Amps] use or not coaxial audio cable to transmitter's

> Date: Sat, 30 Oct 2010 20:49:11 -0500
> From: "Gary Schafer" <garyschafer at comcast.net>
> Subject: Re: [Amps] use or not coaxial audio cable to transmitter's
>
> An impedance mismatch at the antenna (high reflected power) does not cause
> RF to appear on the outside of the coax.
> The reason RF is on the shield of the coax is because it is acting as part
> of the antenna. Just like a dipole does when no choke is used at the feed
> point.
> The antenna may also be too close to the rig and radiating directly into 
> the
> rig/microphone cable.
>
> 73
> Gary  K4FMX
>
> ##  His coax  is 2.5M  long.   2.5m = 8.2'    His ant is
> probably 4-6' away.   Stick 500w  into a vertical...
> 4-6' away...and it could be a problem.  It will work
> mobile, so it can be done.
>
> Jim  VE7RF
>
>
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