®

The "WINDOM"
My Favorite Multi-Band Antenna

By G. E. "Buck" Rogers Sr;  K4ABT

In September of 1949, I was tired of climbing poles and trees to move, remove, add, or change my single-band HF antenna's.  I had used single band dipoles and doublets for almost every HF Amateur band.  I had tried a few "long-wire" and Zepps, but again, operation was restricted to single band operation, maybe two bands at most.

I had heard of the "Windom" and read a few articles about the Windom, but most of my thoughts were ... ho-hum.. just another dipole fed a bit off-center.  Then one evening at a meeting of the GARC in the old "Sea Scouts" club house near the Coosa River in Gadsden, Alabama; I heard some of my "elmers" Gale Caudle (then W4CFB), Jack Kennamer W4YPC, Bob Bynum W4USM, Vic W4CWF, Ed Elkins W4CDI, Homer Dupree W4OZK... and others discussing the Windom all-band HF antenna.  It was only when Jack mentioned using one (Windom) antenna on most all HF bands...  "without an antenna tuner"  that my ears went directional!

It was that last phrase that really caught my attention.  "most all HF bands, without an antenna tuner....etc"  What !  A multi-band HF antenna without a tuner?   Surely I had been blessed. 

To think that I could put up a Windom, and no longer have to climb the poles and trees to hang another (single band) HF antenna was great news to my ears.  To be able to use it without an antenna tuner was icing-on-the-cake.  For a kid without any extra funds, an antenna tuner was a luxury that I could not afford.  Even my transmitter was a single 807 rig built on an Atwater-Kent radio chassis, given to me by my grand-father.

In those days, a BALUN was unheard of.  My Elmer's described, a means of connecting my coax to the off-center fed antenna using a nine (9) turn coil of the coax feed-line, at the feed point, to form a "de-coupling" loop.  The de-coupling loop provided a crude means of matching the feed coax to the antenna, and at the same time, it would reduce the "re-radiation" along the outside (shield) of the coax.

Today we have toroid cores and BALUN devices that provide a more efficient means of coupling RF energy to the antenna (reducing the VSWR), while performing better impedance matching.  In the drawing shown above, I've drawn the exact dimensions of the Windom I built in 1949.  The only differences in my Windom of 1949 and today are:

1) the material the insulators are made of, and
2) I've substituted a 4 to 1 BALUN for the 9 turn, 8 inch diameter, decoupling loop.

The "Windom Antenna" was described by Loren G. Windom in QST magazine, September 1929.
Pages 19 through 22.  It is named after its inventor/designer.

4:1  BALUN
BUX BALUN 41 is used to feed Dipoles and off-center-fed HF antennas.  Prevents high VSWR, and provides maximum transfer of RF energy to your HF antenna.

50 ohm, unbalanced input

Balanced output

3.5 to 30 MHz

Power Rating @ 200 Watts

Toroid design

Lightweight construction

Sealed against moisture

 

Order    BUXBALUN 41          $24.95

SECURE, On-line order form, Click Here!

FAX or Mail order form, Click Here!

ANTENNA  INSULATORS

Weatherproof, (TENYTE) insulators.  Perfect for your DIPOLE or Windom antenna.
For the apartment dweller, you can now hang the 20 meter doublet in the attic.   I've QSO'd with stations all over the world with the 33 ft dipole in my garage attic.  One insulator at the center, and one each end.   It's great for other HF WINDOM and single-band dipole antennas.  Dielectric strength is comparable to the old ceramic insulators, without susceptibility to cracking or breakage under impact or severe temperature change.

Package of   3,     $4.95
Order No.    3INSULTR

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