HF and Earth
Submitted: Friday, May 23, 2008 at 11:41
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Wayne (NSW)
I know that the earthing of the auto tune aerial is very important and there is an earth strap at the base of the aerial that has to be fixed to the body of the vehicle.
Is there a problem with running a heavy cable (12v X 150amps the same as used in dual battery set ups) from the earth strap to the - pole on the battery? The same battery that the
HF radio unit runs off.
Advantage would be a good earth but would it have interference when using the HF or is there some other thing that might cause a problem?
Wayne
Reply By: Member -Signman - Friday, May 23, 2008 at 11:51
Friday, May 23, 2008 at 11:51
Hi Wayne,
Just my tuppence worth..
Don't confuse RF earth with electrical (battery) earth..
What your trying to do is make the vehicle a large ground spike- hence the surface area of the earth strap braid to the chassis/body of the vehicle....so long, of course, all the connections are clean and tight.
If someone could organise a base (I found a spring)- I could set you up with a tapped whip..
Cheers
AnswerID:
305443
Follow Up By: Wayne (NSW) - Friday, May 23, 2008 at 12:04
Friday, May 23, 2008 at 12:04
Signman,
Thank you for your reply, it has cleared a few things up about the importance of the vehicle. The bigger the vehicle the bigger the ground spike. I have never thought of the Troopie as a ground spike.
What does this base for the whip look like, can one be made?
Wayne
FollowupID:
571448
Follow Up By: Member -Signman - Friday, May 23, 2008 at 12:31
Friday, May 23, 2008 at 12:31
The base is just a bigger version of a CB base- except for a 1/2" stud (instead of 5/16)- and a side entry for PL259 co-ax connection..
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