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

[Bob McGraw - K4TAX]

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 at sssnet.com>
To: "Discussion of Ten-Tec Equipment" <tentec at 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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