Cecil, W5DXP wrote:
"The requirement is that the coil be self-resonant at the operating
frequency."

That`s what I remembered. It`s as if a parallel resonant LC circuit is
substituted for a quarter-wave short-circuited stub inverting the phase.

My problem is finding the page in Kraus` 3rd edition. Anyone have the
number?

Best regards, Richard Harrison, KB5WZI

Richard Harrison wrote:
My problem is finding the page in Kraus` 3rd edition. Anyone have the
number?

Page 824
--
73, Cecil, W5DXP

Cecil, W5DXP wrote:
"Page 824"

Yes. Thank you very much. I had lost track and seemed not to be able to
find the item again.

The illustration is Figure 23-21 (b). Four in-phase 1/2-wave elements
with phase-reversing coils. Kraus says:
"Here the elements present a high impedance to the coil which may be
resonated without an external capacitance due to its distributed
capacitance. A phase reversal is about 180-degrees.

Best regards, Richard Harrison, KB5WZI

Richard Harrison wrote:
Cecil, W5DXP wrote:
"Page 824"

Yes. Thank you very much. I had lost track and seemed not to be able to
find the item again.

Those little sticky tabs solve the problem.

The illustration is Figure 23-21 (b). Four in-phase 1/2-wave elements
with phase-reversing coils. Kraus says:
"Here the elements present a high impedance to the coil which may be
resonated without an external capacitance due to its distributed
capacitance. A phase reversal is about 180-degrees.

Thanks Richard, there are apparently still old wives
who believe that a coil cannot reverse the phase of the current
even though a shorted stub can. I'm going to post the current
magnitudes and phases for a number of 3/2WL configurations along
with the gains.
--
73, Cecil http://www.qsl.net/w5dxp



-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

Mike Coslo wrote:
Well Richard, have you not heard of the famous aperture mask?
Reduces the aperture of the telescope, and there are people that swear
by them!

And, they don't work either.

Mine works well to reduce the light from the moon to a comfortable
viewing level for my 18" diameter reflecting mirror.
--
73, Cecil http://www.qsl.net/w5dxp



-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----

On Fri, 30 Jan 2004 08:24:34 -0600, Cecil Moore
wrote:

Mike Coslo wrote:
Well Richard, have you not heard of the famous aperture mask?
Reduces the aperture of the telescope, and there are people that swear
by them!

And, they don't work either.

Mine works well to reduce the light from the moon to a comfortable
viewing level for my 18" diameter reflecting mirror.

So do moonglasses.

Richard Clark wrote:

wrote:
Mine works well to reduce the light from the moon to a comfortable
viewing level for my 18" diameter reflecting mirror.

So do moonglasses.

If you don't mind looking like a dorky nerd. :-)
--
73, Cecil http://www.qsl.net/w5dxp



-----= Posted via Newsfeeds.Com, Uncensored Usenet News =-----
http://www.newsfeeds.com - The #1 Newsgroup Service in the World!
-----== Over 100,000 Newsgroups - 19 Different Servers! =-----