Art Unwin wrote:

The helix is four foot long and a foot diameter. The base of the
reflector is 1.5 feet
snip
Art

A 1 foot diameter helix would be a design for the 1 meter band, not 160.
You need to scale it up just a bit.

The diameter should be about 50 meters. The reflector should be maybe
150 meters in diameter. This is not going to fit in your back yard.

tom
K0TAR

On Apr 22, 8:46*pm, Tom Ring wrote:
Art Unwin wrote:

The helix is four foot long and a foot diameter. The base *of the
reflector is 1.5 feet
snip
Art

A 1 foot diameter helix would be a design for the 1 meter band, not 160.
* You need to scale it up just a bit.

The diameter should be about 50 meters. *The reflector should be maybe
150 meters in diameter. *This is not going to fit in your back yard.

tom
K0TAR

Tom
What you say it should be is guided by conventional teachings and my
designs are not conventional. Per conventional teachings it would be
very large indeed which is why my design has to be different Actually
I want to see if I can lower the conventional take of angle with the
use of tipping mechanism plus the rotator addition.
With CP I may lose a bit of S meter readings but if I can lower the
TOA with the antenna on the ground that will be a big step forward.
Any way the antenna doesn't know that it should not work and despite
your comments it works OK, but as yet I have not been able to
establish the radiation patterns. So I have a antenna at around 30
feet and the other on the ground with a tipping device so the up
coming tests should be interesting.
Both antennas will cover top band and of course will have gain, but at
the moment it is TOA that I am concentrating on, after that it is
patterns
It is the journey not the destination.
Regards
Art

Art Unwin wrote:
On Apr 22, 8:46 pm, Tom Ring wrote:
Art Unwin wrote:

The helix is four foot long and a foot diameter. The base of the
reflector is 1.5 feet
snip
Art
A 1 foot diameter helix would be a design for the 1 meter band, not 160.
You need to scale it up just a bit.

The diameter should be about 50 meters. The reflector should be maybe
150 meters in diameter. This is not going to fit in your back yard.

tom
K0TAR

Tom
What you say it should be is guided by conventional teachings and my
designs are not conventional. Per conventional teachings it would be
snip
Art

Ok. So what have you changed from a standard helical design that makes
it "not conventional" ?

Your original description sounded pretty much like a stock 1m band
helical, so if you've done something to pull it down 160:1 in frequency,
I'd love to hear what it is. It must be simple and obvious, because you
didn't mention it in your post.

tom
K0TAR

Art Unwin wrote:
On Apr 22, 8:46Â*pm, Tom Ring wrote:
Art Unwin wrote:

The helix is four foot long and a foot diameter. The base Â*of the
reflector is 1.5 feet
snip
Art

A 1 foot diameter helix would be a design for the 1 meter band, not 160.
Â* You need to scale it up just a bit.

The diameter should be about 50 meters. Â*The reflector should be maybe
150 meters in diameter. Â*This is not going to fit in your back yard.

tom
K0TAR

Tom
What you say it should be is guided by conventional teachings and my
designs are not conventional.

To say the least...


--
Jim Pennino

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