I'm diddling with the design of a homebrewed 20M hexagonal wire beam a
la the Traffie Hexbeam. I have the driven element resonated at
14.150 in the modeler. Now I have to add the reflector to the model.
The question is how much longer should the refelector be vs. the
overall length of the driven element in terms of percenatge/scale
factor. I'm much more interested in F/B performance than I am in
forward gain. Does anybody who has been there have suggestions for a
starting point??

I would say, Use 4nec2 to let it automatically determine the reflector
length and/or spacing for optimal F/B ratio, or send me your EzNec,
NecWin+, *.ant data or whatever modeler you are using, and I'll let
you know the spacing and/or length.

Arie.

p.s. excuses for the new thread, because somehow I am not able to
reply any more on an existing posting because I get below message:

"Unable to retrieve message
"

Anybode having a suggestion to overcome this or how to get more
detailed error info ?

wrote:
"Unable to retrieve message
"

Anybode having a suggestion to overcome this or how to get more
detailed error info ?

If I remember correctly, Google gives their posters the option
of the article expiring after a certain number of days and
not being retained. Looks like that article expired.
--
73, Cecil http://www.qsl.net/w5dxp


----== Posted via Newsfeeds.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeeds.com The #1 Newsgroup Service in the World! 100,000 Newsgroups
---= East/West-Coast Server Farms - Total Privacy via Encryption =---

wrote:
I'm diddling with the design of a homebrewed 20M hexagonal wire
beam a
la the Traffie Hexbeam. I have the driven element resonated at
14.150 in the modeler. Now I have to add the reflector to the
model.
The question is how much longer should the refelector be vs. the
overall length of the driven element in terms of percenatge/scale
factor. I'm much more interested in F/B performance than I am in
forward gain. Does anybody who has been there have suggestions for
a
starting point??

I would say, Use 4nec2 to let it automatically determine the
reflector
length and/or spacing for optimal F/B ratio, or send me your EzNec,
NecWin+, *.ant data or whatever modeler you are using, and I'll let
you know the spacing and/or length.

There's an offer I can't refuse. After I add a "generic" reflector to
the model I can ship you an .nwp file probably sometime on Friday,
Saturday at the latest.

I can't decipher your e-mail address. Mine is (kelly) at dvol dot com.
Delete parenthesizes.

Thanks Arie.

Arie.

w3rv


p.s. excuses for the new thread, because somehow I am not able to
reply any more on an existing posting because I get below message:

"Unable to retrieve message
"

Anybode having a suggestion to overcome this or how to get more
detailed error info ?

.. . . we're all Google's involuntary beta testers, pain in the butt . .

wrote in message roups.com...

There's an offer I can't refuse. After I add a "generic" reflector to
the model I can ship you an .nwp file probably sometime on Friday,
Saturday at the latest.

Brian, I did some quick F/B optimization runs runs with the NWplus
model you supplied me. I have included two different Nec-2 based
results. One with limited space in mind, the does require a bit more
space.

****************

CE
GW 1 20 -8.427 0.25 35 -4.213 8.677 35 0.0026707
GW 2 20 -4.213 8.677 35 0 0.25 35 0.0026707
GW 3 20 0 0.25 35 4.213 8.677 35 0.0026707
GW 4 20 4.213 8.677 35 8.427 0.25 35 0.0026707
GW 5 20 -9.230476 -2.083189 35 -4.615238 -10.20362 35 2.6707e-3
GW 6 20 -4.615238 -10.20362 35 0 -2.083189 35 2.6707e-3
GW 7 20 0 -2.083189 35 4.615238 -10.20362 35 2.6707e-3
GW 8 20 4.615238 -10.20362 35 9.230476 -2.083189 35 2.6707e-3
GS 0 0 .30479
GE 1
GN 0 0 0 0 13 0.005
EX 0 2 20 0 1 0
LD 5 1 1 20 5.8001E7
LD 5 2 1 50 5.8001E7
LD 5 3 1 20 5.8001E7
LD 5 4 1 20 5.8001E7
LD 5 5 1 20 5.8001E7
LD 5 6 1 20 5.8001E7
LD 5 7 1 20 5.8001E7
LD 5 8 1 20 5.8001E7
FR 0 1 0 0 14.1
RP 0 37 73 1000 -90 0 5 5
EN

****************

CE
GW 1 20 -8.427 0.25 35 -4.213 8.677 35 0.0026707
GW 2 20 -4.213 8.677 35 0 0.25 35 0.0026707
GW 3 20 0 0.25 35 4.213 8.677 35 0.0026707
GW 4 20 4.213 8.677 35 8.427 0.25 35 0.0026707
GW 5 20 -9.068188 -4.483977 35 -4.534094 -12.71031 35 2.6707e-3
GW 6 20 -4.534094 -12.71031 35 0 -4.483977 35 2.6707e-3
GW 7 20 0 -4.483977 35 4.5340941 -12.71031 35 2.6707e-3
GW 8 20 4.5340941 -12.71031 35 9.0681881 -4.483977 35 2.6707e-3
GS 0 0 .30479
GE 1
EX 0 2 20 0 1 0
LD 5 1 1 20 5.8001E7
LD 5 2 1 50 5.8001E7
LD 5 3 1 20 5.8001E7
LD 5 4 1 20 5.8001E7
LD 5 5 1 20 5.8001E7
LD 5 6 1 20 5.8001E7
LD 5 7 1 20 5.8001E7
LD 5 8 1 20 5.8001E7
FR 0 1 0 0 14.1
RP 0 37 73 1000 -90 0 5 5
EN

******************

With some additional keyboard action you should be able to get the
model back into NWplus.

Arie.