[Mobile-Portable] Question about HF mobile

[AD5PE]

On my Ford, neither the cab nor the bed is grounded to the frame, except by
a couple of (too small for HF) copper braids.  The body is mounted to the
frame via bolts, but they go through rubber grommets (donut sized) for
vibration dampening.  There's probably some DC continuity there, but not
much at HF.  That's why everyone says to bond everything to everything else
- it helps the antenna's ground, making it more efficient, but it also cuts
down on RF in the rig.

Jay
AD5PE 

-----Original Message-----
From: mobile-portable-bounces at mailman.qth.net
[mailto:mobile-portable-bounces at mailman.qth.net] On Behalf Of Brian K.
Gaskamp
Sent: Thursday, July 12, 2007 19:01
To: Mobile-Portable Reflector
Subject: Re: [Mobile-Portable] Question about HF mobile

JV, its mounted to the lip of the top of my truck bed, like where you would
install bed rails on a truck for decoration, hope I'm explaining that
correctly.

I have no idea if the cab is grounded to the chassis, you would think it
would be.

Size of wire going to the battery, if you talking about the power cable that
came with the radio, its the original cable, not anything pieced together.

Radio is not grounded as of yet, but working on that.

Fuses are at the battery.

Brian
KA5BKG
----- Original Message -----
From: "JV" <jv at kt4u.org>
To: "Mobile-Portable Reflector" <mobile-portable at mailman.qth.net>
Sent: Thursday, July 12, 2007 5:53 PM
Subject: Re: [Mobile-Portable] Question about HF mobile


>    Ground the antenna bracket. I think you said it was a gutter mount. If
> so, you will have to remove paint and primer to get to the bare metal. 
> Just
> tighten it up will not work. Is the gutter grounded to the cab? Is the cab
> ground to the chassis? What size wire do you have going to the battery? Is
> the radio grounded? Make sure you have a fuse in the -/+ lines at the
> battery.
>    I ran a 706MKIIG and Hustler antennas for over seven years. Sold the 
> 706
> and now have a 7000 with no problems.
> JV
>
> ---Original Message------- 
>
> From: Brian K. Gaskamp
> Date: 7/12/2007 6:10:57 PM
> To: Mobile-Portable Reflector
> Subject: Re: [Mobile-Portable] Question about HF mobile
>
> Ok guys another question about this mobile setup of mine.
>
> I put the 706 in low power and Swr is flat, I bump it up to medium or high
> power and swr's go ABT 2.3:1...
>
> Why do they do that on high power?
>
> 73,
> Brian
> ----
> Your Moderator: Dick Flanagan K7VC, mobile-portable-owner at mailman.qth.net
> 


----
Your Moderator: Dick Flanagan K7VC, mobile-portable-owner at mailman.qth.net