10 Element Quad-Yagi (Quagi) for 900 MHz Band
Elements 1-7 are spaced 3 inches (7.6 cm) apart on the boom. There is 6 inches (15.2 cm) between elements 7 and 8. There is 2 3/4 inches (7 cm) between elements 8 & 9, and 3 1/4 inches (8.2 cm) between elements 9 & 10.
The Boom, should be non-metal or metal if the elements are insulated from it. The driven element and reflector may be made of #12 (solid) copper wire. The “spreader” holds top & bottom of the driven element and reflector loops, to the boom with a single screw.
Detail of Quad Elements (shown individually for clarity)
Driven Element (total length 11 3/8 inches (28.9 cm))
Reflector (total length 13 1/8 inches (33.4 cm))
Table of Sizes
Element | ||||
---|---|---|---|---|
Length | Center | |||
Element # | Inches | cm | Inches | cm |
1 | 5 3/16 | 13.2 | 2 19/32 | 6.6 |
2 | 5 1/4 | 13.3 | 2 5/8 | 6.7 |
3 | 5 5/16 | 13.5 | 2 21/32 | 6.7 |
4 | 5 3/8 | 13.7 | 2 11/16 | 6.8 |
5 | 5 7/16 | 13.8 | 2 23/32 | 6.9 |
6 | 5 1/2 | 14.0 | 2 3/4 | 7.0 |
7 | 5 9/16 | 14.1 | 2 25/32 | 7.1 |
8 | 5 5/8 | 14.3 | 2 13/16 | 7.1 |
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