Enjoy editing with automated formatting & paragraph adjustment. Paragraph Editing: You can edit text and graphics right in your PDF.This is an outstanding time-saving upgrade on previous versions of the app.
With the newly designed interface of version 6, it is now possible for users to edit any document in a similar manner as they would in Microsoft Word™. You also have full document restriction control. Two square holes are opened on the box allowing the boom to penetrate.With Wondershare PDFelement 6 you can edit paragraphs, add watermarks, spell check your document, and add digital signatures.
A 2"x3"x1" plastic box is used for the mounting of two dri ven elements. Easy adjustment of driven element length is thus essential for the success of the whole project. The length of the driven element is the most critical since it will have direct and severe impact of the SWR response of the antenna. The length for reflector and directors are not too critical since they will compensate with each other. The reduction factor is about 75-80% of brass. To make it simple for cutting estimation, steel based metal needs shorter element length.
Threaded rods on the market are usually made of three types of metal - brass, plated steel and stainless steel. If elements of other metal are employed, the length will change. The element length dimension (not spacing) listed in the above table refers to brass material. The nut is required so that length adjustment of the driven element is possible. 1/4" diameter is chosen just because that is the smallest size where matching nuts with long body are available. This difference has nothing to do with radiation efficiency (although the larger dimension does cause a difference in resonance length). All reflector and directors are made of threaded rods (10-24 diameter) while driven elements have a slightly larger diameter of 1/4".
Their flat surface makes it much easier to be drilled. One of my concerns is how to maintain accuracy in dimension of the elements during drilling activities (via hand held tools instead of drill press), A 7/8" square tube is thus chosen as the boom material.