Using 3 Bands (only) of 5-Band S-Beam
Occasionally, for instance at Field Day or other portable operations, someone may wish to use only 20/15/10m on the 5-Band Spiderbeam.
It is faster to erect the Spiderbeam if we can leave the 4 WARC band elementss off.
Does this work?
The short answer is YES.
- about 0.3 dB less forward gain
- about 3 dB less Front-to-Back ratio
For those interested, Tino (VK3EGN) has modeled the 5-Band Spiderbeam when leaving the 4 WARC elements off. His files may be downloaded below:
EZNEC 5-Band Spiderbeam
EZNEC 5-Band w. 3-Band Elements