9' of coax in mobile install to lower SWR?

[2NC995]

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.

 

[Alexis Mercado]

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 ?

 

[CB590]

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 ?

RG-8x double shielded.

 

[CB590]

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.

 

[CB590]

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.

 

[CB590]

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.

 

[ForestRunner98]

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.

 

[CB590]

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.

 

[Slowmover]

Applegate advises against nuts/bolts. (Though wouldn’t hurt as backup).

Screws have the bite deemed necessary.

Use Internal/External Tooth Lock washers

 

[Slowmover]

(I hear an echo .. echo .. echo).