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アンテナ Comtek COM-20VAのPDF 取扱説明書をオンラインで閲覧またはダウンロードできます。Comtek COM-20VA 8 ページ。 20 meter vertical antenna

3. Slide the 1" OD element that has the EXTREN

below. Adjust the EXTREN

Bolts evenly so the length of the exposed threads is approximately equal. Any U-Bolt should be

tightened evenly from side-to-side with an equal amount of thread above each nut.

4. Install the studded band clamp (antenna feedpoint) at the bottom of the 1" OD aluminum

element as shown below. Use a small amount of Penetrox A between the studded band clamp

and the 1" OD aluminum element.

5. Assemble the vertical sections as shown in Figure 1 using the stainless steel element clamps

allowing a 6 inch overlap between the element sections. Slide all the clamps over each section

before putting them together. You can lightly tighten the clamps just

below the slits in each section to hold them until needed. Align the clamp

screws on each section to face the same direction. At final assembly, body

of the clamp should be positioned between the slits in the tubes and 1/8"

from the edge of each tube as shown to the right. When assembled as

shown you will have an overall length of 17 feet. During tuning, you will

make slight adjustments to get the center frequency to where you want it.

insulators installed in the U-Bolts as shown

insulators so they are centered on the U-Bolts. Tighten the U-

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