Regarding the defrost heat element, there's two terminals, one on either
side. However with the resistance of the defrost wiring in the window,
it might be more like a dummy load. Of course one could just feed one
side against the auto body, unless one drives a Corvette which is mostly
plastic. grrrr
Seems I recall a DDRR antenna which was a low profile, roof mountable
antenna. The 40M version would be a bit large with a diameter of some
9 ft, although one might reduce the size and still make a 40M - 10M of
reasonable dimensions with reasonable efficiency.
73
Bob, K4TAX
K3S s/n 10163
On Jul 15, 2017 7:54 PM, "Wayne Burdick" <n...@elecraft.com> wrote:
I’m dealing with one of the last unsolved problems in amateur radio: how
to operate HF mobile without an antenna. At least not one that, according
to some vehicle co-owners/spouses, would defile your new sedan.
For 10 bonus points that have only philosophical value, your challenge is
to create an invisible mobile antenna and actually make a QSO on it. For
practical purposes (i.e., not frying the car or passengers) let’s say the
maximum power level is 10 watts. The bands of interest are 40-10 meters.
Here are some ideas I’m considering:
- mag loop in the rear window
- thin wire loop on a roof rack
- gamma match to the entire roof
- surface acoustic waves
- prayer
Other ideas?
Yes, I know this violates the laws of physics and bioethics. And I fully
expect the car to generate debilitating levels of RFI. But isn’t this the
least you’d expect from an unsolved problem?
Thanks in advance,
Wayne
N6KR
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