[TenTec] Eagle Tuner

[Bob McGraw - K4TAX]

Well, lets see if I can answer those questions;  ** See embedded text.

----- Original Message ----- 
From: "Rick - DJ0IP / NJ0IP" <Rick at DJ0IP.de>
To: "'Discussion of Ten-Tec Equipment'" <tentec at contesting.com>
Sent: Wednesday, September 10, 2014 12:42 AM
Subject: Re: [TenTec] Eagle Tuner


> Carter,
>
> That was an excellent question and Carl gave a great answer, but it is
> also a little more complex than that.
>
> My questions to Bob would be:
>
> 1. What kind of balun (if any) are you using on the coax fed dipole?
** A current choke consisting of #43 & #74 material over RG-213 located at 
the feed point of the antenna.

> 2. How is its coax running back to the house?  In the air or along the
> ground?
** Down the leg of the tower strapped tight to the leg on the inside of the 
tower.

> 3. Do you have an RF choke in the coax line just where it reaches the
> house?
** No, after the PolyPhaser on the tower leg, the coax enters through the 
eve vent, through the attic and drops through the ceiling to the back of the 
Tentec 238 tuner. There is a coax choke with beads between the input of the 
tuner and the amplifier output.

> 4. How is the openwire feedline running back to the house?  Similar to the
> dipole?
** Standing away from the tower some 18" supported on PVC stand-offs.

> 5. Have you twisted the openwire on its route to the house?
** Yes with ~ 10 twist per 10 ft of tower between the  PVC standoffs.

> 6. What kind of balun are you using on the openwire fed folded dipole?
**None as it is fed by a balanced tuner.

> 7. What kind of noise are you talking about?  General band noise or noise
> in storms?
** General atmospheric noise from storms estimated at 300 to 600 miles 
distant.

> 8. Is this 1 to 2 S-Units the same in all directions (probably hard to
> tell)?
**Antenna is not rotatable.

>
> All of these can have an impact on the signal to noise ratio at the radio.
> The main factor in most points is common mode current.


73
Bob, K4TAX