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A more exact way to adjust the C and L values is to use an oscilloscope to fine tune the phase
and magnitude of the 4 antennas.
The values may vary a bit, so using an oscilloscope to observe magnitude and phase is a
common way to adjust. We have designed the hybrid quadrature toroid device to incorporate the
proper amount of inductance for standard 4 Square arrays. So you may find that you do not need
the supplied inductor at all. But it is worth putting into the circuit and checking if there is a
reduction in SWR, and or power into the dummy load. You may have to vary the inductance of
the inductor by removing turns to optimize this effect.
Band
160
80
40
Relay
K1
K2
K3
K4
www.arraysolutions.com
2611 N. Beltline Rd.,Ste 109
Sunnyvale, TX, 75182, USA
C to add
33-600 pF
33-300 pF
110-220 pF
Relay Logic by Direction
NE
SE
0
1
0
1
0
0
0
0

Theory of operation:

Phone: +1 214 954 7140
L to add
1-12 µH 12 µH supplied
1-6 µH
1-3 µH
SW
NW
0
1
0
1
1
1
0
0
Four Square Manual, ver. 2.1
Omni
0
0
0
1
August 21 2017
6