[VHFcontesting] [VHF] Some 432MHz Questions

[David]

There are no radials under the Eggbeater.  I will not be able to stack 
antennas so my question deals with the efficiency of a single Eggbeater as 
compared to other single antennas such as HO-Loop, Par or Wheels.

Thanks for the replies.

David


----- Original Message ----- 
From: "Alfred Green" <nu8i at cox.net>
To: <vhf at w6yx.stanford.edu>
Cc: "VHF Contesting Reflector" <vhfcontesting at contesting.com>
Sent: Friday, June 27, 2008 10:37 PM
Subject: Re: [VHF] Some 432MHz Questions


>>> I have a M2`Eggbeater antenna at about 50 ft on the side of my 70 ft
>>> tower. It was put there several years ago for satellite work. Since I
>>> no longer work satellites I want to optimize my 432 performance for
>>> contesting.   Are there other omni directional antennas that can be
>>> side mounted that will work better for ground wave?
>>>
>
> The egg-beater, while a good satellite antenna, is not very good on the
> horizon if you have the radials underneath it. Over 10 degrees it's
> fine. Not so good for weak signal work.
> Someone else just mentioned the big-wheel, I've built a few of those
> over the years for various bands and they work fine. I've not tried
> stacking them, but if you can work out the mechanics it should do well.
> A simple approach is just a pair of crossed dipoles, with a 90 degree
> phasing line between them. It gives circular polarization up into the
> sky, but on the horizon it is fairly omni-directional and horizontal.
> Probably the origin for the eggbeater design.
> Of course, the good old Halo can work well, but is gain-challenged. Off
> the side of a tower you could stack a bunch of them to compensate.
>
>>> What do most folks use for jumpers between the radio and amplifier at
>>> 432? I find the 3 ft jumper of 9913 with N connectors to be too
>>> stiff.  Would RG-8 with N connectors be just as well in 3 ft length?
>
> Piffle. 432 is almost DC anyway. For a 3ft length anything a bit better
> than twin-lead will work just fine.
>
> GL & 73,  Alf  NU8I
> Scottsdale  AZ  DM43an
> 160m > 24Gigs
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