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Re: [TenTec] Antenna is up, but the coupler doesn't like 160 meters

To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] Antenna is up, but the coupler doesn't like 160 meters
From: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sat, 12 Oct 2013 07:47:13 -0500
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
Are you using any extra C connected to the rear terminals of the tuner? Likely needed if the high Z switch is in #5 position. The extra C is 1000 pf @ 500 V as provided by Tentec.
I use 256 ft of wire {natural resonance measured to be 1.85 MHz}, center fed 
with 450 ohm window line, about 65 ft, connected direct to the center feed 
point of the antenna  and direct to the 1:1 W2FMY current balun at the 
operating position.  The balun is connected to the Tentec 238 tuner via 
about 1 ft of RG-213.  To get to the low end of 160M I do have to connect 
the extra C to the rear terminal of the tuner.
This arrangement will work all bands, all frequencies 160M - 10M, attaining 
a 1.5:1 match or better.  Center of the antenna is at 50 ft configured as an 
inverted V with the ends about 25 ft above the ground.

73
Bob, K4TAX



----- Original Message ----- From: "Mike Bryce" <prosolar@sssnet.com>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, October 11, 2013 11:36 PM
Subject: [TenTec] Antenna is up, but the coupler doesn't like 160 meters


Okay boys and girls.

the antenna project is done

I have a 160 meter doublet feed with 600 ohm line. 130ish feet on each side.
Followed the antenna suggestions from everyone and now have it connected 
to a 1:1 balun with a one foot hunk of coax to the Ten Tec 239 coupler.
Everything works fine------ except for 160 meter

I can't find a tuning solution for any freq on that band below 1.995 mhz.

Shortening the antenna feedline is not possible, it has to reach the coupler.
I don't like the idea of adding more length to the feedline, but looks 
like I may have to.
How much?

What about lengthening the wire on the ends of the antenna?

Make it shorter, (the overall length of the antenna)

The 239 can find a solution on 1.995 (SWR 2:1) but the selector shows the best match on the high Z side
okay, it's been too quiet here, so this should heat things up


Mike, WB8VGE
SunLight Energy Systems
The Heathkit Shop
http://www.theheathkitshop.com/
J e e p
o|||||||o

A man with one clock knows what time it is. A man with two clocks is never sure.


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