[TowerTalk] Re: Slopers, half slopers, (using the tower)

[Guy Olinger, K2AV]

Slopers are notoriously variable in their performance. This is because 
the tower itself is fully in play, as are the antennas on it.

A particular tower/antenna system is usually very difficult to model 
accurately, as is the base connection to actual ground. And it is 
entirely possible to change something on the tower and detune the 
sloper. And so the unpredictability and variation in results.

A sloper is also sensitive to the ground radial system (or lack 
thereof).

There is a long well thought out thread in the TopBand reflector 
archives:

http://lists.contesting.com/archives//cgi-bin/namazu.cgi?query=slopers&submit=Search%21&idxname=Topband&max=20&result=normal&sort=score

This is a recurring subject among 160 operators because the size of 
antennas on that band begs for short solutions.

73, Guy


----- Original Message ----- 
From: "KJ0M" <kj0m at mchsi.com>
To: <towertalk at contesting.com>
Sent: Wednesday, December 29, 2004 3:09 PM
Subject: [TowerTalk] Re: Slopers, half slopers, (using the tower)


> >
>> On Sep 25, 2004, at 8:57 PM, Tower (K8RI) wrote:
>>
>>> Any one have experience with "half slopers"? (half of a half wave 
>>> with
>>> the tower serving as the other side)
>
> I worked all 40 Zones on 40 and 80 meters to complete my 5BWAZ using 
> half slopers on my tower. They may not be scientific and there may 
> be better antennas, but they do work on occasion. You have to do 
> lots of calling if the pileups are big, but working some of those 40 
> zones from South Dakota can be a real challenge, not matter what 
> kind of antenna you have, HI!
>
> I've since switched to a BC Trapper with 40 buried radials, which 
> seems to get through the pileups much quicker.
>
> YMMV.
>
> 73,
>
> Jim
> KJ0M
> .-.-.
>
> _______________________________________________
>
> 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 at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>