Art Unwin wrote:
Kraus states that for a helix one should not use wire shorter than two
wavelength which I suspect is a substitute calculation for the VF
change from a straight radiator.

Because of adjacent coil coupling, it takes
more wire to achieve the phase shift effect
of a straight wire.
--
73, Cecil, IEEE, OOTC, http://www.w5dxp.com

On Apr 20, 4:07*pm, Cecil Moore wrote:
Art Unwin wrote:
Kraus states that for a helix one should not use wire shorter than two
wavelength which I suspect is a substitute calculation for the VF
change from a straight radiator.

Because of adjacent coil coupling, it takes
more wire to achieve the phase shift effect
of a straight wire.
--
73, Cecil, IEEE, OOTC, *http://www.w5dxp.com

Which is what I have always maintained, lumped loads are not included
in Maxwell's
equations .
Art

"Art Unwin" wrote in message
...
Which is what I have always maintained, lumped loads are not included
in Maxwell's equations .

CORRECT! he got one right! must be dumb luck.

you are absolutely correct, there are no terms in maxwell's equations
representing lumped loads. HOWEVER, you can use maxwell's equations to
derive the fields that explain how lumped elements work.

On Apr 20, 6:06*pm, "Dave" wrote:
"Art Unwin" wrote in message

...

Which is what I have always maintained, lumped loads are not included
in Maxwell's equations .

CORRECT! *he got one right! *must be dumb luck.

you are absolutely correct, there are no terms in maxwell's equations
representing lumped loads. *HOWEVER, you can use maxwell's equations to
derive the fields that explain how lumped elements work.

At the expense of efficiency per unit length

"Art Unwin" wrote in message
...

At the expense of efficiency per unit length

and what does that refer to?? i don't think i've ever heard of something
with those units... they really don't make any sense.

On Apr 21, 5:49*pm, "Dave" wrote:
"Art Unwin" wrote in message

...

At the expense of efficiency per unit length

and what does that refer to?? *i don't think i've ever heard of something
with those units... they really don't make any sense.

Somebody changed the subject. I suppose you can start a new one since
this one has been taken away
Art