ANTENTOP- 01- 2018 # 022

Low Profile Antenna for the 30, 20, 17, 15, 10 and 6- meter Bands

Coaxial cable was going inside of the tubes. Between the tubes I put some pieces of a cleaning tape for my soldering iron. The tape provides good electrical contact between the tubes. The tubes were connected by each other with help of a shrink with glue (I bought a 1.5 meter length of such shrink for 3 CAD in SAYAL). The tubes were fastened to the fence with help of Copper Strapping Tape.

For antenna ground it was used from one side a counterpoise in 10 meters length and from other side it was used a metal tubes (where the coaxial cable ran). At the antenna place I used electrical grounding similar to shown on the Figures 10, 11 and 12 from the article Universal Beverage Antenna

(http://www.antentop.org/019/va3znw_019.htm ).

Curious Dog

The grounding should bleed the static from the antenna wires to the ground.

After there were listed some design futures of the antenna I would like to stop on the tuning of the beast. For me it was a not big deal. At first I printed several pages for writing down SWR and Z of the antenna at all bands. You may download the same templates pages at:

http://www.antentop.org/022/Low_profile_022.htm

Then I connected the coaxial cable to my lovely MFJ- 259B and began the checking SWR/Z. Everything data were logged in the tables. Then I begin tune the antenna on the 6- meter band to a minimum SWR. After that I turn on to the next band- 10 meters and so on.

Plastic Removing of the Plastic

The antenna wire in the process is simply bent and attached to the fence with a stapler. It was some tricky procedure, when you tune the antenna for the one band you may find a lower SWR at another band (where the wires are not resonant).

At every tuning of the one antenna wire the SWR/Z for all Bands was measured and wrote off to the table. The procedure was repeated again to correct the bands where the SWR was growing... It took several hours to tune the antenna to all bands - 30, 20, 17, 15, 10 and 6- meter.

I managed to reach SWR 1.2:1 at 30 meters, SWR 1.7:1 at 20 meters, SWR 1.8:1 at 17 meters, SWR 1.5:1 at 15 meters, SWR 1.6:1 at 12 meters, SWR 1.5:1 at 10 meters, SWR 1.5:1 at 6 meters.

Metal Tube (a Holder Mop)

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