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Old March 15th 05, 10:51 PM
J. Mc Laughlin
 
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Default Interesting Antennas

While looking for something else, I came across two interesting antennas in
the USPTO data base. Sixty years separates their filing dates.

Patent 2,268,640 shows an antenna invented by the famous George H. Brown.
It may be the first use of nested Yagi type antennas.

Patent 6,411,264 shows a supposed improvement on the 8JK antenna such that
efficiency is preserved and a large F/B is effected. The inventor is N7CL.

Http://www.uspto.gov/ is a place to start. Go to Patents and then to
Patent Searches.

Enjoy, Mac N8TT

--
J. Mc Laughlin; Michigan U.S.A.
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Old March 15th 05, 11:14 PM
 
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Thats interesting Mac I am going to look at that to see what he did.
I modelled a wierd 20 metre antenna today and it finished up with four lobes
in aq vertical direction at the front and the same number of vertical lobes
at the rear.
Need to find out what causes extra lobes. The extra lobes did drop the TOA
down
however to around 8 to 9 degrees
Regards
Art



"J. Mc Laughlin" wrote in message
...
While looking for something else, I came across two interesting antennas
in
the USPTO data base. Sixty years separates their filing dates.

Patent 2,268,640 shows an antenna invented by the famous George H. Brown.
It may be the first use of nested Yagi type antennas.

Patent 6,411,264 shows a supposed improvement on the 8JK antenna such that
efficiency is preserved and a large F/B is effected. The inventor is
N7CL.

Http://www.uspto.gov/ is a place to start. Go to Patents and then to
Patent Searches.

Enjoy, Mac N8TT

--
J. Mc Laughlin; Michigan U.S.A.
Home:




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Old March 16th 05, 12:44 AM
Wes Stewart
 
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On Tue, 15 Mar 2005 16:51:36 -0500, "J. Mc Laughlin"
wrote:

Patent 6,411,264 shows a supposed improvement on the 8JK antenna such that
efficiency is preserved and a large F/B is effected. The inventor is N7CL.


Hey, I know Eric. See: http://www.cal-av.com/antennas.html

for the commercial version of his design.
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Old March 16th 05, 03:57 AM
 
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I don't operate on 40 M so I may be missing something but exactly what is it
that stands
out with this antenna that would make it desirable to hams? Efficiency would
be reflected by the loads
used which is not necessarily "state of the art". He then states "a large
F/B is effected"
but it doesn't show before and after overlaid plots !
Would hams have an interest in a two element 20 M
antenna that have lower TOA than the norm, say 9 degrees instead of the
normal 14 degrees?
I think I can quickly put one together for the week end while putting the
present assembly aside.
Regards
Art


"Wes Stewart" wrote in message
...
On Tue, 15 Mar 2005 16:51:36 -0500, "J. Mc Laughlin"
wrote:

Patent 6,411,264 shows a supposed improvement on the 8JK antenna such that
efficiency is preserved and a large F/B is effected. The inventor is
N7CL.


Hey, I know Eric. See: http://www.cal-av.com/antennas.html

for the commercial version of his design.



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Old March 16th 05, 05:06 AM
Wes Stewart
 
Posts: n/a
Default

On Wed, 16 Mar 2005 02:57:31 GMT, "
wrote:

I don't operate on 40 M so I may be missing something but exactly what is it
that stands
out with this antenna that would make it desirable to hams? Efficiency would
be reflected by the loads
used which is not necessarily "state of the art". He then states "a large
F/B is effected"
but it doesn't show before and after overlaid plots !


Before and after what?


Would hams have an interest in a two element 20 M
antenna that have lower TOA than the norm, say 9 degrees instead of the
normal 14 degrees?



I think I can quickly put one together for the week end while putting the
present assembly aside.
Regards
Art


"Wes Stewart" wrote in message
.. .
On Tue, 15 Mar 2005 16:51:36 -0500, "J. Mc Laughlin"
wrote:

Patent 6,411,264 shows a supposed improvement on the 8JK antenna such that
efficiency is preserved and a large F/B is effected. The inventor is
N7CL.


Hey, I know Eric. See: http://www.cal-av.com/antennas.html

for the commercial version of his design.



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Old March 16th 05, 05:16 AM
Wes Stewart
 
Posts: n/a
Default

On Wed, 16 Mar 2005 02:57:31 GMT, "
wrote:

I don't operate on 40 M so I may be missing something but exactly what is it
that stands
out with this antenna that would make it desirable to hams? Efficiency would
be reflected by the loads
used which is not necessarily "state of the art". He then states "a large
F/B is effected"
but it doesn't show before and after overlaid plots !
Would hams have an interest in a two element 20 M
antenna that have lower TOA than the norm, say 9 degrees instead of the
normal 14 degrees?


That last post got away from me too soon. Yes, I'd like a "TOA" of 9
degrees. Unfortunately, I don't have room for a 110' tower. Now what
do I do?


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Old March 16th 05, 05:17 AM
 
Posts: n/a
Default

The gentleman has his patent.
If I disclosed how this could be beat on this forum would I still be able to
get a patent for myself if I so desire? Or would it be best to not disclose
it at all?
I could not see or define the advantages from what I read which is why I
placed the posting.
Absolutely nothing wrong with that Roy, you must be losing it.
Actually I have heard the same thing said of your computor program
instructions
Regards
Art


"Roy Lewallen" wrote in message
...
I had to chuckle over this -- Art being critical of another antenna design
because the designer doesn't produce adequate quantitative data or explain
clearly what its advantages are.

Thanks for the entertainment. I need a break from reality once in a while.

Roy Lewallen, W7EL

wrote:
I don't operate on 40 M so I may be missing something but exactly what is
it that stands
out with this antenna that would make it desirable to hams? Efficiency
would be reflected by the loads
used which is not necessarily "state of the art". He then states "a
large F/B is effected"
but it doesn't show before and after overlaid plots !
Would hams have an interest in a two element 20 M
antenna that have lower TOA than the norm, say 9 degrees instead of the
normal 14 degrees?
I think I can quickly put one together for the week end while putting the
present assembly aside.
Regards
Art



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Old March 16th 05, 06:21 AM
 
Posts: n/a
Default


"Wes Stewart" wrote in message
...
On Wed, 16 Mar 2005 02:57:31 GMT, "
wrote:

I don't operate on 40 M so I may be missing something but exactly what is
it
that stands
out with this antenna that would make it desirable to hams? Efficiency
would
be reflected by the loads
used which is not necessarily "state of the art". He then states "a large
F/B is effected"
but it doesn't show before and after overlaid plots !


Before and after what?


The original design is 50 years old.
He infers that he has improved the design,
specifically with respect to F/B
What was it before and to what amount was it improved ?
Art

,



Would hams have an interest in a two element 20 M
antenna that have lower TOA than the norm, say 9 degrees instead of the
normal 14 degrees?



I think I can quickly put one together for the week end while putting the
present assembly aside.
Regards
Art


"Wes Stewart" wrote in message
. ..
On Tue, 15 Mar 2005 16:51:36 -0500, "J. Mc Laughlin"
wrote:

Patent 6,411,264 shows a supposed improvement on the 8JK antenna such
that
efficiency is preserved and a large F/B is effected. The inventor is
N7CL.

Hey, I know Eric. See: http://www.cal-av.com/antennas.html

for the commercial version of his design.





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Old March 16th 05, 06:25 AM
 
Posts: n/a
Default


"Wes Stewart" wrote in message
...
On Wed, 16 Mar 2005 02:57:31 GMT, "
wrote:

snip

That last post got away from me too soon. Yes, I'd like a "TOA" of 9
degrees. Unfortunately, I don't have room for a 110' tower. Now what
do I do?

Use a cell phone
Art


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