[VHFcontesting] 6m halo on a rover question

[David Olean]

Get 50 MHz as high as you possibly can. For low angle work, the higher the 
better. Anything up 30 ft will beat a beam at 6 or 8 ft for long ground wave 
or diffraction path QSOs.  I guess if the band is wide open, height is not 
as important for some contacts. Still a small lighytweight dipole or omni up 
high will outperform anything else that is low.  I would try to have 
something like a push up mast that could be employed quickly. If not that, 
you still want something as high as possible. A big difference between 50 
and 144 MHz for sure!!

Dave K1WHS


----- Original Message ----- 
From: "Alex" <kr1st at amsat.org>
To: "'VHF Contesting Reflector'" <vhfcontesting at contesting.com>
Sent: Saturday, May 23, 2009 5:06 PM
Subject: [VHFcontesting] 6m halo on a rover question


> 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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