caveman4684
Member
- Joined
- Mar 4, 2013
- Messages
- 11
I installed a CB radio system in my Grand Cherokee and I'm getting high SWR readings, roughly 2.2 on channel 1 and 40. First, some details about my setup.
Radio: Uniden 980SSB
Antenna: 3' Firestick 2 (adjustable)
Coax: 17' Firestik Fire Ring
The Antenna is mounted near the drivers side taillight as shown in the picture. I realize this location is not ideal and that the antenna is a bit short, but I want to see if there is anything I can do to improve the SWR before relocating the mount and or getting a longer antenna. The Coax runs under the carpet and is not coiled at any point. I did however cut about one foot off and soldered the connector on. I’ve read a variety of opinions regarding coax length and there doesn’t seem to be any concrete evidence to support a full 18 feet versus trimmed to the proper length.
Containment: I’ve been checking SWR in an open area using the built in SWR meter. With antenna cap installed I calibrate then check SWR on channels 1 then 40 then adjust. I’ve checked the coax for shorts and none exist. I installed an additional wire from the mount to the chassis to make sure I’m getting good ground.
Side note: I made contact with someone 30 miles away and they reported a strong signal. It’s probably not relevant, but I was surprised and figured I’d mention it.
Radio: Uniden 980SSB
Antenna: 3' Firestick 2 (adjustable)
Coax: 17' Firestik Fire Ring
The Antenna is mounted near the drivers side taillight as shown in the picture. I realize this location is not ideal and that the antenna is a bit short, but I want to see if there is anything I can do to improve the SWR before relocating the mount and or getting a longer antenna. The Coax runs under the carpet and is not coiled at any point. I did however cut about one foot off and soldered the connector on. I’ve read a variety of opinions regarding coax length and there doesn’t seem to be any concrete evidence to support a full 18 feet versus trimmed to the proper length.
Containment: I’ve been checking SWR in an open area using the built in SWR meter. With antenna cap installed I calibrate then check SWR on channels 1 then 40 then adjust. I’ve checked the coax for shorts and none exist. I installed an additional wire from the mount to the chassis to make sure I’m getting good ground.
Side note: I made contact with someone 30 miles away and they reported a strong signal. It’s probably not relevant, but I was surprised and figured I’d mention it.