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Swr spike.

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Monmouth County, NJ/now Wake County, NC
#1
I installed my cb a couple of months ago. After installation I got my swr down to 1-1.5
I recently have been having reception and static issues. so I checked the swr yesterday and I was getting a high 3 to a low 4, on the built in meter.
I haven't changed anything, what could cause it to spike. I had been checking it, on the built in swr meter, every couple of weeks. The issues started the beginning of the week, so I'm guessing that's when it went up.
The setup is a nmo27 antenna and a bearcat 980.
 
Joined
Apr 3, 2014
Messages
1,275
#2
I installed my cb a couple of months ago. After installation I got my swr down to 1-1.5
I recently have been having reception and static issues. so I checked the swr yesterday and I was getting a high 3 to a low 4, on the built in meter.
I haven't changed anything, what could cause it to spike. I had been checking it, on the built in swr meter, every couple of weeks. The issues started the beginning of the week, so I'm guessing that's when it went up.
The setup is a nmo27 antenna and a bearcat 980.
Check all your connections! It could be a cable or connector issue.
 

SCPD

Member
Joined
Feb 24, 2001
Messages
65,126
Location
Virginia
#3
Try these steps first:

Check for continuity between the feeder jack center pin and end of the antenna element. [Should be no resistance]

Check for continuity between the feeder jack ground or antenna mount and negative battery terminal. [Should be no resistance]

Check for continuity between the antenna element and ground. [Should have complete resistance]
 
Joined
Jul 27, 2005
Messages
10,226
Location
Point Nemo.
#5
When SWR suddenly changes after install, you'd probably be looking at either water intrusion into one of the connectors, damaged cable or a damaged/improperly installed connector.
Damaged antenna isn't out of the question, either.

What antenna are you using and how did you run your coax? Did you do the connector install, or was it pre-terminated cable?
 

jassing

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Premium Subscriber
Joined
Jan 31, 2012
Messages
220
Location
Shelton, WA
#6
The built in meter on the 980 is horrible. Be sure to test with a real / external swr meter & on AM only. Are you testing the swr on the same channel & same location? For instance, moving your car to a car port or closer to a building could make the swr worse.
 
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