Topband: Inverted L

[N2TK, Tony]

After 15 years of using Commscope flooded RG6 for my 80M wire 4-sq I am
showing corrosion on the center conductor at the feedpoints and Comtek box.
So got another roll of the same stuff from eBay and making up 4 new
feedlines. This time slipping 100 ferrite beads on the ends for choking.
Cheap for that many years of use. I use F-connectors on the ends.

By the way ever since I switched over to 100% shielded (aluminum foil) RF6
for all receive lines in and out of the shack and on the transmit side with
hardline and Buryflex inside and out, noise ingress went way down. I no
longer use any coax with just a braid.

73,
N2TK, Tony

-----Original Message-----
From: topband-bounces at contesting.com [mailto:topband-bounces at contesting.com]
On Behalf Of Mike Waters
Sent: Tuesday, November 29, 2011 11:48 PM
To: topband
Subject: Re: Topband: Inverted L

On Tue, Nov 29, 2011 at 9:51 PM, Peter Voelpel <df3kv at t-online.de> wrote:

> Be careful with cheap tv cable. Some are just steel wire with a very 
> thin copper layer ... on 160m you might run into too high losses.
>

Very true. But the 1000' rolls of Commscope RG-6 I bought cheaply off of
eBay had a sufficiently thick coating of copper.

CATV-type Commscope brand quad aluminum shield RG-6 is all I use here to
feed my antennas. The copper coating on the steel-cored center conductor is
thick enough to use even below 160 meters. At 1 MHz, it has just .25 to .38
dB/100 ft loss.

Here's the full specs for two types:
http://awapps.commscope.com/catalog/uniprise/product_details.aspx?id=25253
http://awapps.commscope.com/catalog/uniprise/product_details.aspx?id=34310

What is more, it has the same low loss and similar power handling
capabilities as RG-213/U. http://vk1od.net/transmissionline/RG6/

Why spend big bucks on name-brand copper coax?

73, Mike
www.w0btu.com
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UR RST IS ... ... ..9 QSB QSB - hw? BK