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9' of coax in mobile install to lower SWR?

You’ll notice in my photo it’s not showing ohms, but miliohms...thousandths of an ohm.

So at 36.6 miliohms shown, I am very near zero at that frequency.
 
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The spring will make the antenna longer, therefore, lowering the SWR. And definitely, make at least 2 notches to have it seat properly.

Bu the way, what cable did you use, RG-8X or
RG-58 ?
 
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The spring will make the antenna longer, therefore, lowering the SWR. And definitely, make at least 2 notches to have it seat properly.

Bu the way, what cable did you use, RG-8X or
RG-58 ?

Ordered the FS HD spring for $13 in factory retail pkg. Should drop the SWR a tad. Just want to not hurt the RFX95 mosfet. Better safe than sorry.
 
My tuning tip is almost all the way out. If I turn it in the SWR goes up?? Does anyone think adding a spring would help me get a better SWR?? Figured it might also help the bracket flex less. This is a 5' antenna

I'd like to get lower than 1.3:1 with the RFX on with 15w dk. Does go up slightly with modulation to like 1.5:1. That's on 32. On 19 it's like 1.4:1 and moves up too.

Thoughts.

Update

With spring in place and RFX95 on, I'm at 1.2 1/2:1 SWR on 19. Moves a tad up to like 1.3:1 with modulation. Though I know that's not how to measure.

Flat SWR on 28 and up. Like 1.3:1 on Channel 6. I'll call it good enough.
 
When I have time I'm going to remove tail light and knock off the paint so I get flat metal to flat metal. Instead of just the 4x #12 SS screws making ground.

You don’t need to remove the paint. Use some star washers. They will grab and make contact without paint removal. I have done both methods on my truck.
 
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You don’t need to remove the paint. Use some star washers. They will grab and make contact without paint removal. I have done both methods on my truck.

The bracket is stainless. It's the contact of 4 self tapping SS screws that I'm trying to improve to the body. And of course I checked behind the assembly and Ford used double metal. And the screws don't penetrate the second layer of inner metal structure. :(

other option is go with some seriously long screws or #12 screws and nuts. Then I could get star washers on the inside to grab metal.
 
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