[BC] Counterpoise Ground System

[Bailey, Scott]

I doubt the way codes are these days, you could get away with a
counterpoise like that. Too many overhead wires, and someone would
complain. My idea would to use only 6 radials. In a new installation
like that, which is not done anymore, 6 radials at 1/4 wave would be
perfect.
I think Chicago has several Class C's with roof top grounds.  I saw a
site where a Valcom was used on top of a roof in Canada, and the steel
of the building was some sort of ground system, and this was tune to
1130.

Scott

-----Original Message-----
From: broadcast-bounces at radiolists.net
[mailto:broadcast-bounces at radiolists.net] On Behalf Of Bill Harms
Sent: Tuesday, September 19, 2006 2:12 PM
To: Broadcasters' Mailing List
Subject: Re: [BC] Counterpoise Ground System

Scott:

	Please check this out.  KSBN 1230 Spokane, Washington uses a
counter-
poise system that stretches across the streets and parking lots to 
other buildings.  http://spokane.philcobill.com/kfio/tower.php

And this from http://towers.philcobill.com/towers.html

Delaney Building (was Realty Building) West 242 Riverside Avenue.  
1946 to present.

This transmitter plant is unique among Spokane stations with its 
overhead counterpoise system. The tower is 190-feet tall and the top 
is 305 foot above the street level. Technicians strung out 45,000 
feet of wire for the counterpoise from the building rooftop. Some of 
the wire was removed when neighboring buildings were razed. In 1946, 
KREM1340 was the first station to use this facility. Purportedly, 
KREM subsequently used 970 kHz from this site right before its move 
to the Moran Prairie site in 1951, when much of the Delaney Building 
transmitter plant was dismantled.  Del Cody and Dick Williams 
purchased KFIO from Louis Wasmer in August 1951 and moved to this 
site. They then rebuilt the transmitting facility, resumed 
broadcasting on 1340 kHz as KSPO, and then later changed to 1230 kHz. 
For a long time, the offices and studios were located on the third 
floor of the Realty Building. KSBN currently transmits from this 
facility on 1230 kHz (from 29 April 1991). Their offices and studios 
are currently located in the Ridpath Hotel. Two other stations, KYLK 
(1950's) and KRSS (19 September 1990-April 1991) also used this 
facility for a short time. (Edward Antosyn and Carl Partlow, Early 
Days of Spokane Radio; fcc.gov; Spokesman Review various dates) 

((Bill Harms Copyright 2006))
-----------------------------------------------------------------  

On 19 Sep 2006 at 9:38, Bailey, Scott wrote:

> Has anyone have a Counterpoise Ground System on their AM tower?  Last
> month in Radio Guide, Ron Nott brought up some interesting comments in
> his article about it, and how it may be the answer of getting away
from
> the traditional 120 buried copper radials that the commission demands
we
> AM guys have.
> 
> We just had a house across the street from my station that had their
> plumbing system redone in copper. The copper thieves came during the
> night and yank out all the copper and I guess cash it in for something
> like drug money.
> 
> If anyone has any pictures of a Counterpoise ground system, please
email
> them to me. Also I'm sure if you decide to use such a ground system, a
> proof of performance has to be conducted to meet efficiency.
> 
> Scott
> 
> _______________________________________________
> 
> The BROADCAST [BC] list is sponsored by SystemsStore On-Line Sales
> Cable-Connectors-Blocks-Racks-Wire Management-Test Gear-Tools and
More! 
> www.SystemsStore.com       Tel: 407-656-3719    Sales at SystemsStore.com
> 
> 



_______________________________________________

The BROADCAST [BC] list is sponsored by SystemsStore On-Line Sales
Cable-Connectors-Blocks-Racks-Wire Management-Test Gear-Tools and More! 
www.SystemsStore.com       Tel: 407-656-3719    Sales at SystemsStore.com