i installed a 102 inch steel whip to my jeep it had a aluminum bracket so i bolted it to the side of the rear. i can’t get nothing but a high swr reading 25, so i unscrew the coax and just let the male end hanging in the antenna and the radio gets louder, and swr reading can be obtained, the minute i screw the tightening nut it looses power and you can barely hear the radio, i loosen the nut so it’s not touching anything with male end still in the female end the radio gets louder again,what am i doing wrong?
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installing shipp antenna
- Thread starter Tintotty
- Start date
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Check your connections with an ohm meter. With no coax connected: the antenna whip should show "infinity" and metal side of the mount should be "0" ohms between it and a good chassis ground point.
Disconnect the coax from the radio and antenna ends: The meter should show "infinity" between the coax center conductor and the outer ring, "0" ohms between center pin to center pin and "0" ohms between outer ring and outer ring.
Reconnect coax to only the antenna connector: The meter should show "infinity" between the center connector and the outer ring at the (disconnected) radio end and "0" ohms between the outer ring and a ground point.
Disconnect the coax from the radio and antenna ends: The meter should show "infinity" between the coax center conductor and the outer ring, "0" ohms between center pin to center pin and "0" ohms between outer ring and outer ring.
Reconnect coax to only the antenna connector: The meter should show "infinity" between the center connector and the outer ring at the (disconnected) radio end and "0" ohms between the outer ring and a ground point.
Sounds like your mount is grounded out. Many mounts have an insulator between the ground side of the mount and the hot side, if that's not installed right the hot side gets grounded. Follow the instructions above to resolve that.
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