[Top] [All Lists]

Re: [TenTec] Suggestions please

To: "'Discussion of Ten-Tec Equipment'" <tentec@contesting.com>
Subject: Re: [TenTec] Suggestions please
From: "Rick - NJ0IP / DJ0IP" <Rick@DJ0IP.de>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 10 Jan 2011 06:54:19 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>

Thanks for the link.  Didn't know there was such a product on the US market.

I personally use spreaders from Arno, DL6SX.
They come in several sizes and fit a range of wire sizes with a single
Here is a link to that system:  http://www.dx-wire.de/brit/spreaders.htm 

Unfortunatley there is no US source for this great product.
You'll need someone in Europe to QSP for you.


-----Original Message-----
From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]
On Behalf Of Paul Christensen
Sent: Sunday, January 09, 2011 4:31 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] Suggestions please

> For example, when used in the multiband doublet application 200ft of
> Wireman 553 has about 2.6dB of loss at 28MHz. When wet, that figure
> rises to 9.3dB, based on the work of Wes Stewart N7WS.

And the reason I've been using homebrewed open 600-ohm line -- using the 276

log formula  :-)

The line uses E.F. Johnson glazed ceramic spreaders spaced every 18-inches. 
Total of roughly 50 ft. of line between a 130 ft flat-top dipole to a 
ground-mounted motorized symmetrical balanced tuner.   When QRT, the 
balanced line is automatically disconnected from the tuner with a pair of 
Jennings vacuum switches to form a quasi "knife switch."  LMR-400 between 
the ATU and shack.  The open feeder length represents a reasonable end-Z 
compromise on all bands from 80m-10m and remains under 1,000 ohms and over 
50 ohms at the tuner terminals at all times.   50-ohm VSWR  never changes, 
wet or dry.  Next time the line comes down, a re-application of Rain-X is 
needed on the glazing.   ATU details on my QRZ.com page.

Been tempted to replace the Johnson spreaders with Delrin but I doubt 
there's much difference in total dielectric loss with such a short run of 


Paul, W9AC

TenTec mailing list

TenTec mailing list

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