HF Multi Tap Earthing/Grounding advise

Submitted: Thursday, May 26, 2016 at 19:10
ThreadID: 132541 Views:2306 Replies:5 FollowUps:2
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From the Vehicle where do you connect the other end of the earthing/grounding strap onto a HF multi tap Aerial….. (I thought between the aerial base and the bracket?) I have "Googled" but have not found any diagrams of where the correct place for the other end of the strap………….The Multi Tap is only a backup if my 9350 Auto tune was away being repaired.
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Reply By: Member - Chooky and Wobble - Thursday, May 26, 2016 at 19:50

Thursday, May 26, 2016 at 19:50
Assuming the multitap has a standard HF antenna base it will have a 1/2 inch or similar nut/bolt with a spring washer to attach it to the bracket on the vehicle. The earth strap should be attached to the bolt/stud on the underside of the bracket. Not between the base and the bracket. Your autotune should have been earthed in a similar way.
Don't forget the other end needs to be attached to the main chassis or major metal that is part of the structure of the vehicle.

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Follow Up By: cobber - Friday, May 27, 2016 at 02:54

Friday, May 27, 2016 at 02:54
Thanks Chooky I was close!......LOL
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Reply By: Member - William B (The Shire) - Thursday, May 26, 2016 at 20:26

Thursday, May 26, 2016 at 20:26
Hi cobber,
this article may help.

http://www.bushcomm.com.au/aussie-hf-antenna-guide/mobile-hf-antenna-installation-earthing-guide.html

William
Always planning the next trip. VKS-737 mobile 1619

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Follow Up By: cobber - Friday, May 27, 2016 at 02:58

Friday, May 27, 2016 at 02:58
Thanks William I did see that article but it didn't say were to put the wire on the aerial base end........now I am wiser
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Reply By: HKB Electronics - Friday, May 27, 2016 at 10:14

Friday, May 27, 2016 at 10:14
Personally I prefer to go overboard to ensure I have a good earth on the antenna
and avoid issues, in my case the antenna is mounted on the rear door, I have run the earth from the antenna to the rear door, then from the same point to the rear quarter panel earth point and from their to the vehicles chassis using appropriate cable.

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Reply By: Stu & "Bob" - Saturday, May 28, 2016 at 10:17

Saturday, May 28, 2016 at 10:17
I don't recall ever seeing an earth strap on a tapped whip antenna, they earthed through the base via the bolt.

An autotune needs to have an earth strap as it is flexi mounted and electrically isolated from the vehicle.
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Reply By: Member - JOHNVK2JF - Sunday, May 29, 2016 at 20:53

Sunday, May 29, 2016 at 20:53
Have a look at K0BG.com. Go to Grounds, RF & DC.
If you have time and are so inclined read his whole site.

John
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