View Single Post
  #1   Report Post  
Old November 25th 07, 11:17 PM posted to rec.radio.amateur.homebrew
[email protected] jrsinglesli@gmail.com is offline
external usenet poster
 
First recorded activity by RadioBanter: May 2007
Posts: 8
Default For Sale -Home brew balanced line tuner - Twin Roller Inductors

A magnificently built, balanced output antenna tuner for use with
ladder line, open wire line.

Item is for sale on e-bay Item # 290185692713 Auction ends
Sunday 12/2 at 19:00 Z



Highlights & Features of this tuner:

The twin inductor/current balun design provides a truly balanced
output.

(2) 14 uH roller inductors, coupled to a WW II vintage dial with 25
turns, 1/100 turn markings.

High/Low Impedance Switching: Switches the capacitor bank to
tuner's input or output. "HI" position is used for impedances above
50 ohms; "LO" is used for impedances below 50 ohms.

Variable and fixed capacitance controls - continuous range is from 25
to 1250pf @ 4500 Vpk.

Variable capacitor dial is the classic 4-inch National Velvet Vernier.

Beautiful, real wood venier over aluminum front panel.



In Photo 1, the large coil on the right is a coaxial choke balun that
goes between the output of the rig and the input of the tuner. Please
indicate if you do not plan to use this coil, I will be happy to
install a ferrite choke balun inside the cabinet.

Dimensions: H,W,D = 8 X 19 x 15 inches, approximate weight = 30 lbs

Good luck with the bidding,

Bob WB2ICQ