The S9v43 must be ground-mounted using a 54-inch section of standard 1-1/2" galvanized plumbing pipe (1.9" max OD - not provided). The S9v 43' base tube simply slips over the pipe for a simple and elegant deployment. A mechanical connection from the antenna base tube to the pipe is neither required nor desired. A stainless steel pipe mount clamp is included with the antenna to keep the base of the antenna off of the ground.
The antenna requires a manual or automatic antenna tuner either in your shack or remotely located at the antenna feed point. Most internal rig auto tuners do not have adequate range to match the high impedances presented by S9v43 at various HF frequencies.
Using a weatherproofed remote antenna tuner at the S9v 43' feed point ensures absolute lowest signal loss and best overall multi-band performance.
For optimum performance, the S9v43' should be used with at least 16 radials (32 preferred), with each radial at least 0.2 wavelength at the lowest operating frequency. If you have the time and resources, 32 or more radials at least 0.2 wavelength long (or longer) should be considered.
There is no precise formula to calculate the length of ground-mounted radials because everyone has different soil and soil tends to change the electrical length of the radials.
It is highly recommend that you use the optional S9RP Aluminum Radial Plate to connect and organize your ground radials. The radial plate is also used to provide the critical ground connection for the coax shield, unun, balun or remote antenna tuner.
Copyright 2011 Universal Radio, Inc.