After installation of multi-mode coax lightning arrestors, I have referenced several techincal papers that call for shield grounding at building entrance (done) and also at the bottom of the vertical drop and top of tower. My question relates to HF transmitting to a horizontal wire dipole antenna w/1:1 current balun. I have been warned by a colleague that microwave towers (where most grounding references come from) and HF do not behave alike WRT to standing waves on the coax feedline. Is there experience that would indicate that HF feedlines require more than one shield grounding to ensure the proper operation of TVSS/lightning arrestors? Would a second coax shield-ground at the bottom of the feedline's vertical drop be likely to cause an impedance "bump"?
TIA, Jack Painter Virginia Beach, Va
Red Flag Submitted
Thank you for helping keep Eng-Tips Forums free from inappropriate posts. The Eng-Tips staff will check this out and take appropriate action.
Reply To This Thread
Posting in the Eng-Tips forums is a member-only feature.
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a partâ€™s function at the center of their design considerations. Download Now
Metal 3D printing has rapidly emerged as a key technology in modern design and manufacturing, so itâ€™s critical educational institutions include it in their curricula to avoid leaving students at a disadvantage as they enter the workforce. Download Now
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now