Alan, close but no cigar!!
The only mirror mounted antenna I have is for the "required" CB radio in my truck.
(required on jobsites and rock crushers, otherwise I wouldn't have it as the antennas get
beat to pieces by tree limbs since so much of our work is off road)
The antenna I am using is a 102" whip with the LDG Z-11 PRO auto tuner. The whip is
mounted about 3 feet behind the cab ( a 2007 Kenworth Day Cab) which has very little metal
in it. (the entire cab, other than portions of the doors is made of an extremely strong plastic)
I can disconnect the coax from the auto tuner or even the radio itself and the noise goes away.
So, yes, it is coming in thru the antenna system.
Also, the trailer I'm using is a belly dump which has a slope to the rear of the truck. The antenna
is about 3 1/2 to 4 feet forward of the trailer, mounted on a bracket between the frame members.
I understand that that setup is not an ideal situation but, it does work. Just the noise is bad.
I might go ahead and use the 7000 as you suggested, but, the reason I hesitate is because
our operations are 30 to 40% off road. (oilfield roads) Very rough since we build the actual well sites
in some pretty hard to get to places. ( oil and gas companies are crazy, they'll drill ANYWHERE)
I guess if the surface mounted components in the 7000 are considered tougher than the build
of the TS-50s, then I should give it a try. I did not buy the 7000 new, but, when it arrived from the
original owner, I was floored at how NEW it looked. Very well cared for. First time, in a long time that
I bought something from someone online and it exceeded the description given by the seller.
And as I said, it works great.
One question for you Alan, since I do not do OTR trucking but, regional/local off road trucking is
there an antenna (screwdriver or another) that you would recommend I use, other than the whip/
auto tuner combo? I use an Alpine Screwdriver antenna on my pickup and I know that that particular
antenna would never hold up to the abuse of off road trucks.
Thanks for your advice. (oh, and I do read your website, very valuable information there and much appreciated)