Towertalk
[Top] [All Lists]

[TowerTalk] analysis request

To: "Towertalk" <towertalk@contesting.com>
Subject: [TowerTalk] analysis request
From: "Jim Jarvis" <jimjarvis@comcast.net>
Date: Sun, 14 Dec 2003 21:34:25 -0000
List-post: <mailto:towertalk@contesting.com>
I'd like to come up with a model for the RF choke system
I'm using on one of my wire antennas.  

Coax comes vertically to ground...six type 71 clamp-ons, .75 inch
long are placed over it.  Then, coax shield is grounded with an 8'
rod.  Then, six more type 71 clamp-ons go over the coax heading to
the shack.

This T network is repeated 50' later, where the coax enters the
shack.  

The question is this:

Can one assume that each clamp on represents a single turn choke,
with whatever reactance is rated for the ferrite, at the operating
frequency?  

One analyst has suggested that it's the lossiness of the ferrite, not
the inductance per-se, which is important.  

I'm off to look for the mfr's specs on this stuff....but would appreciate
the thoughts of anyone inclined to model this.  

Jim/N2EA

_______________________________________________

See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather 
Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions 
and ask for Sherman, W2FLA.

_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk

<Prev in Thread] Current Thread [Next in Thread>