dnovember99
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- Oct 16, 2019
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If that set up in picture #8 is correct then what could possibly be causing this issue?
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extremely high SWR and won't work
- Thread starter dnovember99
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Ok i have a few questions about the set up
#1 have you tried without the spring mount, (i have seen where it has a broken wire inside and causes it to go bad)
#2, where is the Antenna mounted and is it fully grounded to the body of the car
#3 have you tried to maybe run a braided flat copper wire to the main frame of the car jeep ect
#4 see if you could try another antenna, they may Have a defect in the antenna and my be shorter then is needed.
long shot here but try a wal-mart mag mount antenna to help trouble shoot the issue, and maybe check on another car, if the issue is still there, you have a bad radio, and if its new try to get a replacement or get an upgrade.
#1 have you tried without the spring mount, (i have seen where it has a broken wire inside and causes it to go bad)
#2, where is the Antenna mounted and is it fully grounded to the body of the car
#3 have you tried to maybe run a braided flat copper wire to the main frame of the car jeep ect
#4 see if you could try another antenna, they may Have a defect in the antenna and my be shorter then is needed.
long shot here but try a wal-mart mag mount antenna to help trouble shoot the issue, and maybe check on another car, if the issue is still there, you have a bad radio, and if its new try to get a replacement or get an upgrade.
An SWR that high typically means you have an open circuit somewhere. The places to check are the radio, the feed line, anything in that feed line, and then the antenna. In any order you want, as long as you check all of it, there can be more than one 'wrong' thingy. How do you do that checking? Good question! Just depends on what equipment you have available to do it yourself, or get some one competent to do the checking.
dnovember99
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- Oct 16, 2019
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Ok so after watching the video on the placement of the washer, I think I may have found my problem. I did have the placement of the isolation washer correct, but where it states that the side with the raised edge needs to go downwards to fit in the hole.... Well the mounting bracket I have the whole is just big enough for the part the coax connects to, it isn't big enough for the isolation rings to slide into that.
So I am wondering if that could be the issue? I think I will start by drilling out that hole so the washer fit inside there to see if that solves it. If not then I will test without the spring.
Everything is mounted on the bed of the truck where the tail gate closed. The bracket and truck have been sanded to ensure a good connection. I haven't tried the flat braid copper wire yet. But I will have to look at that also.
prcguy
Member
The plastic washer has a shoulder that fits into a 1/2" hole and insulates the 3/8" stud that will go through it. If you drilled a 3/8" hole in the metal then the stud will short out and your hair will fall out.
dnovember99
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we now this would make sense.
the question is, if that washer doesn't fit inside the hole then is that going to be an issue?
dnovember99
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which makes sense. but if that washer doesn't fit inside the hole, then i would need to bore it out a little bit to make sure that the washer fits. otherwise i would have to find a completely different mount.
prcguy
Member
If you drilled a 1/2" hole it should fit, unless you squished the shoulder and distorted it from a wrong size hole.
dnovember99
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so i just took the mount off and measured the mounting hole. attached is a picture that is showing this is at 3/8" so there is no way that the washer would fit into there anyway. it will have to be drilled out in order for this to work.
Attachments
prcguy
Member
Measure the brass stud that sticks through the washer, it should be 3/8". If so you need to drill the hole out to 1/2" for the shoulder washer to fit.
dnovember99
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I have to say thank you to everyone! The isolation washer not setting in the mount correctly, so I drilled it out, got it all hooked up and now I have things working great! Ch. 1 is 1.4 and ch. 40 is 1.3!
I would say it's a job well done
I would say it's a job well done
mmckenna
I ♥ Ø
Glad to hear it's working.
3/8" hole for a consumer antenna mount is a bit odd. There are some commercial antenna mounts that will use a 3/8" hole, but they are not as common. Makes me wonder how many guys have bought those mounts and are running around with awfully bad SWR and just don't know it.
dnovember99
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I am thinking that I will write them and let them know! Because it seemed strange that the isolation washer had that lip and didn't fit the hole they put in there.
But hey a little mod and it was up and running. Almost felt like an episode of the red-green show!!
mmckenna
I ♥ Ø
Some days are like that. I've got an F350 with a service body at work loaded down with tools, test gear, parts, connectors, cable, etc.
There are times when duct tape and ty-wraps are the answer.
K5MPH
Member
This is what these fourms are all about helping each other out good luck......
Firekite
Member
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- Apr 2, 2019
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- 471
Maybe designed to be a 3/8” hole NMO mount?
mmckenna
I ♥ Ø
That what I was suggesting above, but NMO mounts are not common for the CB crowd. 3/8 x 24 is more common for CB. With the poor ground plane provided by mounting off the back of the bed like that, and no commercially available 1/2 wave NMO CB antennas, it's even a more confusing choice of hole size. If amateur radio use was the intended market, 3/4" would be much more useful.
If NMO was the plan, then the 3/4" mounts are much more popular and accepted by the industry.
Wondering if this bracket mount was more intended for mounting lighting or sand dune flags.
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