Thanks for all info, Dom.
to construct a large (2M) helix with light weight, a non-traditional
design of some sort might be tried. Perhaps paint the helix on the
surface of an inflatable cylinder, with conductive paint?
Also, what if the coils/turns are something other than circular? perhaps
rectangular or triangular?
The brain has been tossing out crazy ideas recently, but in my
experience, crazy ideas are not always crazy...
On 03/12/2014 04:49 PM, i8cvs wrote:
Hi Gus, 8P6SM
Mounting 3 turn helix antenna for 2400 MHz concentrically
inside a 3 turns helix antenna for 1268 MHz was used as a
feed both wounded LHCP to illuminate a ground station prime
focus dish for RHCP uplink and downlink on Mode-L/S for
AO40 and it worked very well.
If you plan to build a 10 turns RHCP helix antenna for 70 cm
conentrically into a 5 or 6 turns RHCP helix antenna for 2 meters
in my opinion it should work as well but the weight of this
antenna will be very very hight and not practical to be used in
comparison with yagi antennas.
73" de
i8CVS Domenico
----- Original Message -----
From: "Gus" <[email protected]>
To: <[email protected]>
Sent: Wednesday, March 12, 2014 9:33 AM
Subject: [amsat-bb] Question for the antenna gurus
Regarding axial-mode helix antennas, what happens if you build a helix
for each of two different bands (like 2M/70cm), and mount them
concentrically, on the same backplane?
--
Gus 8P6SM
The Easternmost Isle
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_______________________________________________
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--
Gus 8P6SM
The Easternmost Isle
_______________________________________________
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