Yagi Troubleshooting Guide
36
The 4 Element & MonstIR:
(each have a driven, director 1, director 2 & reflec-
tor)
Pin Numbers
Driven 1 – 2 20 ohms (approximately)
3 – 4 20 ohms
Director 1 5 – 6 20 ohms
7 – 8 20 ohms
Reflector 9 – 10 20 ohms
11 – 12 20 ohms
Director 2 14 – 15 20 ohms
16 – 17 20 ohms
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Next make sure there is an open circuit between the following pins. (Any reading less than 100
K ohms is bad)
●
Connector case to any pin
●
pin 1 to any pin except pin 2
●
pin 3 to any pin except pin 4
●
pin 5 to any pin except pin 6
●
pin 7 to any pin except pin 8
●
pin 9 to any pin except pin 10
●
pin 11 to any pin except pin 12
●
pin 14 to any pin except pin 15
●
pin 16 to any pin except pin 17
●
pin 13 is NOT used
If your antenna passes this test it does not mean it is wired correctly. You could still have
swapped two elements or even wired the whole thing backwards (started at the wrong end of
the terminal strip) and it will still measure correctly because each connector pair has a motor
winding connected to it but it is the wrong one. This test just takes you to the next step of try-
ing to determine if the antenna is wired correctly and then finally determining if the elements
are physically moving. This is an open loop system and the controller has no way of knowing if
the elements are really moving when commanded to.
MISS-WIRED CABLE:
It can be a difficult to figure out what exactly has been miss-wired. Once you have determined
it is likely you have a miss-wire, it is advisable to go up on the tower and check the terminal
wiring. Since there are many combinations of incorrect wiring we will give just a few examples
of common miss-wires and the symptoms they cause.
