[50mhz] [Fwd: Re: Sample of 6m Antenna Comparison Table]
Bill W5WVO
w5wvo at cybermesa.net
Fri Jan 23 00:43:04 EST 2009
Terrific project!
Lionel contacted me already about including my
lengthening/optimizing mod on the CC A50-5S, which has been widely
distributed and duplicated in the field. Others' designs made
using YO (as was mine) would be very useful, assuming they have
been physically done a couple times and the performance matches
the model. :-) I've found this is virtually always the case for
any "reasonable" YO designs (i.e., not so dimensionally critical
and/or narrow-banded that they can't be successfully constructed
by most hams).
YO rules! Bummer you can't buy the amateur version of this
software any more. But you can't blame K6STI, there was rampant
piracy going on...
Bill W5WVO
----- Original Message -----
From: "Lance Collister" <w7gj at q.com>
To: "PNWVHFS" <PNWVHFS at googlegroups.com>; "50 MHZ Mailing List"
<50mhz at mailman.qth.net>; "Magic Band EME" <magic at 6meme.com>;
"Rocky Mountain VHF Plus" <rmvhf at rmvhf.org>
Cc: "VE7BQH" <ve7bqh at shaw.ca>; "Western States Weak Signal
Society" <wswss at mailman.qth.net>
Sent: Thursday, January 22, 2009 4:44 PM
Subject: [50mhz] [Fwd: Re: Sample of 6m Antenna Comparison Table]
> Hello!
>
> VE7BQH has very generously agreed to do computer modeling of a
number of popular
> 6m antennas and prepare a table similar to the one that he
developed some years
> ago to help 2m EME operators compare various 2m antennas and
arrays.
>
> Much of the information currently available regarding 6m beams
seems to be
> confusing and in different terms, making it difficult to make
decisions regarding
> what antenna to use, and/or what antennas to stack and/or how to
stack them for
> the highest gain. We would greatly appreciate it if you could
provide any
> comments regarding the value of this project before Lionel
proceeds any further.
>
> I promise to widely distribute the final product when it is
finished. I look
> forward to your comments. Thank you very much for your input.
VY 73, Lance
>
> -------- Original Message --------
> Subject: Re: Sample
> Date: Thu, 22 Jan 2009 19:54:28 +0000
> From: Lionel H. Edwards <ve7bqh at shaw.ca>
> To: w7gj at q.com
> References:
<5.1.0.14.2.20090121031118.03462760 at shawmail.cg.shawcable.net>
> <5.1.0.14.2.20090120213738.03460d20 at shawmail.cg.shawcable.net>
> <5.1.0.14.2.20090120195304.03458500 at shawmail.cg.shawcable.net>
> <5.1.0.14.2.20090120175603.03459ec0 at shawmail.cg.shawcable.net>
> <5.1.0.14.2.20090120033704.03456ec0 at shawmail.cg.shawcable.net>
> <5.1.0.14.2.20090120033704.03456ec0 at shawmail.cg.shawcable.net>
> <5.1.0.14.2.20090120175603.03459ec0 at shawmail.cg.shawcable.net>
> <5.1.0.14.2.20090120195304.03458500 at shawmail.cg.shawcable.net>
> <5.1.0.14.2.20090120213738.03460d20 at shawmail.cg.shawcable.net>
> <5.1.0.14.2.20090121031118.03462760 at shawmail.cg.shawcable.net>
>
> Lance:
>
> Lets not concentrate on format for now.
>
> We, make that you need to concentrate on the data being useful
on this band..
>
> I have filled in few more antennas to give better
representation.
>
> I do not want to go any further without being SURE this will be
meaningful
> to the 6M group. Even to do what I have done as a sample takes
time.
> Therefore, I do not want to get down stream and find I have to
make major
> changes.
>
> I need you to contact a reasonable sample of the 6M people to
see if we are
> on the right track.
>
>
>
>
> At 04:26 AM 1/21/09 +0000, you wrote:
> >Lionel H. Edwards wrote:
> >>Lance:
> >>
> >>The problem is if I have to many lines across a row, it
becomes a problem
> >>to print. The 144 table is already to long to print without
altering the tabs.
> >>The last thought I sent you causes wrap around without
changing the margins.
> >>
> >>It has to print on a 8.5" x 11" paper to be practical
> >>
> >>The information is not an issue
> >Can it be printed in a "LANDSCAPE FORMAT"? 73, Lance
> >
> >--
> >Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A,
ZF2OC/ZF8)
> >P.O. Box 73
> >Frenchtown, MT 59834 USA
> >QTH: DN27UB
> >TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj
> >2m DXCC #11, 6m DXCC #815
> >
> >
> >
> >
> >
> >--
> >No virus found in this incoming message.
> >Checked by AVG. Version: 7.5.552 / Virus Database:
270.10.9/1900 - Release
> >Date: 1/18/09 12:11 PM
>
> 73,
> Lionel, VE7BQH
> ve7bqh at shaw.ca
>
> --
> Lance Collister, W7GJ (ex: WN3GPL, WA3GPL, WA1JXN, WA1JXN/C6A,
ZF2OC/ZF8)
> P.O. Box 73
> Frenchtown, MT 59834 USA
> QTH: DN27UB
> TEL: (406) 626-5728 URL: http://www.bigskyspaces.com/w7gj
> 2m DXCC #11, 6m DXCC #815
>
------------------------------------------------------------------
--------------
> SIMULATIONS OF A 2
and 4 BAY ARRAY
> OF YAGI ANTENNAS
ON 6 METERS
> 50.150
MHz
>
> [Opt Stacking]
[75% Stacking]
> 1 Ant 4 Ant 2E ant
2V ant 4 Ant 2E ant 2H ant
> TYPE OF L GAIN E H Gain Gain
Gain E H Gain Gain Gain Z
> ANTENNA (WL) (dBd) (M) (M) (dBd) (dBd)
(dBd (M) (M) (dBd) (dBd) (dBd) (ohms)
>
> Cushcraft A50-3S 0.29 5.27 5.52 3.64 12.63 8.77
9.39 4.14 2.73 10.91 8.09 8.22 42.3
> Cushcraft A50-5S 0.59 7.57 6.52 5.11 14.21 10.77
11.04 4.89 3.83 13.08 10.37 10.54 40.3
> W5WVO CC A50-5S MOD 0.87 9.11 7.34 6.09 15.33 12.26
12.21 5.51 4.57 14.41 11.90 11.82 16.9
> M² 6M5X 0.91 9.42 7.65 7.07 15.66 12.59
12.60 5.74 5.30 14.91 12.20 12.34 11.7
> M² 6M7JHV 1.26 10.97 8.56 7.65 17.08 14.07
14.07 6.42 5.74 16.10 13.64 13.59 31.4
> YU7EF 9 2.16 11.83 9.18 8.30 17.90 14.89
14.92 6.88 6.22 16.84 14.44 14.37 52.7
> M² 6M9KHW 2.51 12.75 10.59 9.89 18.85 15.79
15.87 7.94 7.42 17.51 15.21 15.17 20.7
>
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--------------
> Moderator: Ray Brown, KB0STN
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