It could be a disaster if you mounted the loop directly above (and close to)
the
roof. However, if you mount the loop off the rear deck of the car (so most of
the loop is actually over ground, not the car), it will work better, and will
even show some directivity to the rear. This from actual experimentation done
by
a friend of mine with an M2 HO 6m loop mounted in different positions on his
small SUV. I would think you could also mount it on the front of the car and
get
good results as well.
Since this is second-hand wisdom (I've never had a 6m loop), take it with a
grain of salt. Perhaps others have had different experiences.
Bill W5WVO
Alex wrote:
> Hello ya'll,
>
> My wife and I are thinking of being a rover again for the June
> contest. I'm trying to come up with some simple antennas for the new
> rover. No mast with beams this time as it just takes too long to set
> up in the brutal heat of June. I'm thinking of simple magmount
> antennas that I can slap on the roof and be on the air in 10 minutes.
> I just finished building a 2m turnstile dipole that sits just over a
> half wave of the roof. The 70cm antenna will probably be something
> similar. The problem is 6 meters.
>
> I have a halo that I could use on 6 meters, but I wonder how high it
> needs to be off the roof. I know for the turnstiles it needs to be a
> half wave or greater in order not to heat just the clouds. Does the
> same go for a halo?
>
> I guess I could model it, but I'd rather ask the folks with
> experience. What if the 6m halo is just 2 feet or so from the roof?
> Would that be a total disaster?
>
> I really would appreciate your thought on this.
>
> 73,
> --Alex KR1ST
> http://www.kr1st.com
> http://www.airlinkexpress.org
>
>
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