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

[Mike Bryce]

bob and the group


I didn't have the .001 in a voltage rating that would live so I used a .01, and yeah, I know that's way too much C

for the instructions, it looks like the extra c is only used in position 5 on the low z side of the switch.

Now, all that being said, NONE of the antenna couplers will find a solution to the tuning of the band

the best I can get is around 1.995 and it's high there about 2:1 or so

of course everything is grounded.

I'm going to drop the wire down and measure it from the center to the ends and see what I have.

I did some looking around the 'net last night and read that adding a 1/8 wavelength should correct the problem, however, that's 33' of open wire and simply not doable. What in the world do you do with it?

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. 



On Oct 12, 2013, at 8:47 AM, Bob McGraw - K4TAX wrote:

> 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
> 
> 
>