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1994-11-13
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Date: Sat, 26 Mar 94 04:30:06 PST
From: Ham-Ant Mailing List and Newsgroup <ham-ant@ucsd.edu>
Errors-To: Ham-Ant-Errors@UCSD.Edu
Reply-To: Ham-Ant@UCSD.Edu
Precedence: Bulk
Subject: Ham-Ant Digest V94 #80
To: Ham-Ant
Ham-Ant Digest Sat, 26 Mar 94 Volume 94 : Issue 80
Today's Topics:
(none)
93 Quest-How to Mount A 2m Antenna?
Attic Dipole
Best 2m and cb configurations??
FOR SALE: CUSHCRAFT OSCAR SETUP
glass mounted cb antenna?
HELP building a Quagi : Is THHN wire the same as TW wire?
Look for plan: Eggbeater antenna
NEED antenna manufacturer PHONE NUMBER
Salt Lake City Dipoles (2 msgs)
Wanted: AEA IT-1 Tuner for IsoLoop
Send Replies or notes for publication to: <Ham-Ant@UCSD.Edu>
Send subscription requests to: <Ham-Ant-REQUEST@UCSD.Edu>
Problems you can't solve otherwise to brian@ucsd.edu.
Archives of past issues of the Ham-Ant Digest are available
(by FTP only) from UCSD.Edu in directory "mailarchives/ham-ant".
We trust that readers are intelligent enough to realize that all text
herein consists of personal comments and does not represent the official
policies or positions of any party. Your mileage may vary. So there.
----------------------------------------------------------------------
Date: 26 Mar 94 04:04:20 GMT
From: news-mail-gateway@ucsd.edu
Subject: (none)
To: ham-ant@ucsd.edu
ADD ham-ant
------------------------------
Date: Fri, 25 Mar 1994 13:19:38
From: usc!howland.reston.ans.net!europa.eng.gtefsd.com!news.umbc.edu!eff!news.kei.com!yeshua.marcam.com!zip.eecs.umich.edu!newsxfer.itd.umich.edu!jobone!opeo!eve120.cpd.ford.@ihnp4.ucsd.edu
Subject: 93 Quest-How to Mount A 2m Antenna?
To: ham-ant@ucsd.edu
In article <henrysCn4C3F.8tK@netcom.com> henrys@netcom.com (Henry B. Smith) writes:
>From: henrys@netcom.com (Henry B. Smith)
>Subject: Re: 93 Quest-How to Mount A 2m Antenna?
>Date: Wed, 23 Mar 1994 12:59:39 GMT
>Miles Abernathy (miles@mbs.telesys.utexas.edu) wrote:
>: deleted...
>: ... with the help of the shop manual, I can't figure out how to get the
>: headliner out to drill the hole...there are 3" wide plastic retainers all
>: around that seem remarkably immovable.
>:
>: There is inadequate room ("depth") above the dome light to mount the
>: antenna there and still put the dome light back in. All windows except the
Well, I have a '93 Villager, which is virtually identical, and those plastic
retainers are held on by fierce, ball-and-post patches which are sorta like
industrial stiff velcro. Also, the strips "shingle" on one another, so start
with the one on the bottom of the pillar behind the passenger seat/in front of
the side door, and work your way up. I removed the dome light and snaked the
cable towards the side door, fishing for it with a straightened coat hanger. I
then used tie-wraps to hold the cable in place all the way down to the floor.
Next, I ran the cable under the passenger rocker panel and snaked it up under
the dash behind the kick panel. I used a Larson NMO mount under the dome
light, and it fits fine; there's enough give in the headliner for everything
to fit well. I mounted an Icom IC-28H in the DIN slot under the broadcast
radio/cassette, where the optional CD player would go (remove the one external
screw thats on the bottom side of one of the fascia crossbars and the whole
front pops off). During the week, I spin a 1/4 wave on the NMO so I can get
into my work parking structure, but on the weekends the 5/8 wave goes up.
I've got 40,000+ miles on the setup, two Michigan winters, and it works like
the proverbial champ.
(BTW, I'm only a contractor to Ford, so they don't even really let me know
what the corporate opinion is, so I can hardly represent anybody but myself.
Park and Lock, not responsible...
Your milage may vary, Some settling may occur...
73 de Jeff N8KPA@N8NNN.#SEMI.MI.USA
------------------------------
Date: Fri, 25 Mar 1994 20:39:59 GMT
From: ihnp4.ucsd.edu!library.ucla.edu!europa.eng.gtefsd.com!gatech!newsxfer.itd.umich.edu!ncar!csn!col.hp.com!srgenprp!alanb@network.ucsd.edu
Subject: Attic Dipole
To: ham-ant@ucsd.edu
Steve Tobin (tobin@yellow.mmm.com) wrote:
: Troyce@bio.tamu.edu (Troyce) writes:
: >Living in a duplex, I can't put an outside antenna up, so I have been
: >considering designs involving hiding a dipole in the attic. I have about
: >50 feet of length to work with. Right now I am considering a trap dipole
: >for 10-80 meters, 82' long. This would entail running 50 feet straight
: >across the peak of the attic roof, then sloping down 16 feet on each end.
: Having said that, my preference ended up being a random length wire... as
: long as I had room for, as high as I could get it... matched with a L-type
: matching network. ...
Be aware that your trap dipole will likely not give good SWR without a
tuner: the antenna is just too close to ground, electrical wiring, roof
flashing, etc.
What I did years ago was to make a random-length dipole as long as the
available attic, run the coax down to the "shack" through a ceiling light
fixture, and match it with a homemade L-network tuner. Worked pretty well,
considering it was only about 15 feet off the ground.
AL N1AL
------------------------------
Date: 25 Mar 1994 14:18:22 -0700
From: ihnp4.ucsd.edu!mvb.saic.com!news.cerf.net!usc!howland.reston.ans.net!gatech!udel!pacs.sunbelt.net!lynx.unm.edu!hydra.unm.edu!news-user@network.ucsd.edu
Subject: Best 2m and cb configurations??
To: ham-ant@ucsd.edu
Well I looked in rtfm (which of course stands for read the FAQ, man)
in pub/blahblah and found only a copy of the Guide_to_the_Groups
which doesn't help me with my questions. I also have the ARRL
handbook and Antenna Compendiums (V. 1 and 3) and haven't found it
there either. I'm planning a guyed 40 ft PVC mast with 3 antennas.
All would be *inside* the PVC. They would be a long wire receiving
antenna, and 2m and cb antennas designed as full wave
center fed vertical dipoles made from bare 12 g. solid copper.
The bottom tip of the cb antenna would be about 1 (where's the
lambda key?) up and the 2m would be "high" (wavelength wise).
So much for the history, here're the questions:
1. How well does PVC withstand sunlight? I assume it will get
brittle, but does this happen in 2 months or 2 years?
2. Are there any RF characteristics of PVC I should know about?
3. I haven't seen anything about a simple full wave vertical dipole
anywhere. For 80m they might be a bit awkward =>:0 (especially
if you put that puppy 1 wavelength up!!) but for 27 and 144 mhz
it seems ok. Is it? Is a 1/2 wave or 5/8 wave better than
a full wave? Should I make the 2m a 2 wave (1 wave above and
below the feed point)?
Basically if you see what I'm making (a big white post with two
sideways T's sticking out of it) I would appreciate any comments
I may not have covered in my questions.
TIA keith smith keith@unm.edu KC4CEA
ps IS there a FAQ that deals just with designing/building antennae?
------------------------------
Date: Fri, 25 Mar 1994 16:55:46
From: ihnp4.ucsd.edu!swrinde!gatech!udel!pacs.sunbelt.net!lynx.unm.edu!dns1.NMSU.Edu!pc-thooker.psl.nmsu.edu!thooker@network.ucsd.edu
Subject: FOR SALE: CUSHCRAFT OSCAR SETUP
To: ham-ant@ucsd.edu
I have the 2m and 440 crossed YAGI antennas for sale. I am asking $110 obo.
Tracy
T. Hooker email: Thooker@PSL.NMSU.EDU
KA5ECS
------------------------------
Date: Fri, 25 Mar 1994 15:54:54 GMT
From: ihnp4.ucsd.edu!library.ucla.edu!agate!howland.reston.ans.net!math.ohio-state.edu!magnus.acs.ohio-state.edu!csn!server!stortek.com!patrick_tatro@network.ucsd.edu
Subject: glass mounted cb antenna?
To: ham-ant@ucsd.edu
In article <1994Mar25.055226.23963@blaze.trentu.ca> jcooperman@TrentU.CA writes:
>From: jcooperman@TrentU.CA
>Subject: glass mounted cb antenna?
>Date: Fri, 25 Mar 1994 05:52:26 GMT
> I've got a real problem, I recently bought a glass mounted cb
>antenna for my car, the cellular phone model except for CB units. I've
>installed the thing correctly but cannot get a match for either my 23 or 40
>channel cb's. I hooked it up to a match meter but cannot get the thing
>below 2.5......I've tryed adjusting the whip with an allen key so that it
^^^^^^^^
>would slid further down into the housing of the antenna...the problem is
>that it does not go any further into the antenna. I'm wondering if I should
>clip a little off the bottom of the whip so it is a bit shorter and thus
>will go deeper into the antenna assembly......any ideas...should I cut it a
>bit or should I do something else....I'm wondering if I shorten the length
>of the coax lead will it get a better match....
First of all Joe this is an amateur radio antenna news group. Get into Ham
radio its more fun than CB ever could be. Second - what channel do you get the
2.5 SWR - If its on Channel 1 and gets worse as you go up then your antenna is
too long and could use a trim. If its somewhere in the middle then thats
about as good as you are going to get it. If its on the highest channel then
your antenna is too short. I wouldn't worry too much about the length of your
coax.
Hope this has been of some help.
73's Pat N0WCG
------------------------------
Date: 25 Mar 94 20:06:49 GMT
From: ihnp4.ucsd.edu!usc!math.ohio-state.edu!uwm.edu!linac!mgweed!cbnewsk!cbnewsj!dquaglia@network.ucsd.edu
Subject: HELP building a Quagi : Is THHN wire the same as TW wire?
To: ham-ant@ucsd.edu
Background info:
I'd like to build a 2-meter Quagi antenna. Mr. Overbeck specifies
TW-12 wire WITH THE INSULATION [his emphasis] on it, and notes that
if you use different wire or TW-12 wire without the insulation that you
will need to recalculate all the lengths. He doesn't say how to
recalculate them though.
The local wire guy has this wire called THHN wire in a 12 gauge.
Is this the same? Similar enough? If it's different, then how can I
recalculate the size of the quads and the directors. None of Mr.
Overbeck's articles in QST (that I could find) contains any equations
for computing the lengths. The ARRL Antenna book doesn't have the
equations either - just the lengths.
Any help or equations for Quagis is appreciated.
Doug KA2UPW
dquagliana@attmail.com
------------------------------
Date: 25 Mar 1994 16:34:31 GMT
From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!cs.utexas.edu!geraldo.cc.utexas.edu!paulus@network.ucsd.edu
Subject: Look for plan: Eggbeater antenna
To: ham-ant@ucsd.edu
Dear netters:
How to build an Eggbeater antenna ?
for either 144 MHz or 450 MHz frequency range.
Thanks
73 de Paulus N5SNN / YG1QN
--
Paulus Suryono Adisoemarta
yono@ccwf.cc.utexas.edu
yono@gnu.ai.mit.edu
paulus@nextdown.pe.utexas.edu
------------------------------
Date: Fri, 25 Mar 1994 15:44:55 GMT
From: ihnp4.ucsd.edu!swrinde!cs.utexas.edu!utnut!torn!uunet.ca!uunet.ca!dmog10.bell.ca!bcocek!vega!ydupont@network.ucsd.edu
Subject: NEED antenna manufacturer PHONE NUMBER
To: ham-ant@ucsd.edu
I'm looking to get the FAX & PHONE number of the following antenna
manufacturer: ==================
-Diamond Antenna
-Larsen
-Antenna Spcialist
-Cushcraft
I already have Comet numbers.
Thanks for the info...
Yvan - VE2YDU
Bell SYGMA, Telecom Solutions
30 Renaud, Loretteville (Qc) CANADA G2A 2K7
TEL: 418-843-7564 FAX: 418-842-9559
Internet: ydupont@Qc.bell.CA HAM: VE2YDU@VE2GPQ.#QBC.PQ.CAN.NA
-----------------------------------------------------------------------
Disclaimer: The opinions expressed here are mine and not my employer's.
------------------------------
Date: 25 Mar 1994 19:15:22 GMT
From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!math.ohio-state.edu!cyber2.cyberstore.ca!nntp.cs.ubc.ca!unixg.ubc.ca!studney@network.ucsd.edu
Subject: Salt Lake City Dipoles
To: ham-ant@ucsd.edu
--
Donald Studney
C180 C-GZVN "Instrument flying is an unnatural act, probably
VE7FGX punishable by God" .....Gordon Baxter
------------------------------
Date: 25 Mar 1994 19:23:41 GMT
From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!math.ohio-state.edu!cyber2.cyberstore.ca!nntp.cs.ubc.ca!unixg.ubc.ca!studney@network.ucsd.edu
Subject: Salt Lake City Dipoles
To: ham-ant@ucsd.edu
--
Donald Studney
C180 C-GZVN "Instrument flying is an unnatural act, probably
VE7FGX punishable by God" .....Gordon Baxter
------------------------------
Date: Fri, 25 Mar 1994 15:45:51 GMT
From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!math.ohio-state.edu!magnus.acs.ohio-state.edu!csn!col.hp.com!srgenprp!news.dtc.hp.com!hpscit.sc.hp.com!cupnews0.cup.hp.com!genem@network.ucsd.
Subject: Wanted: AEA IT-1 Tuner for IsoLoop
To: ham-ant@ucsd.edu
[ Article crossposted from rec.radio.swap ]
[ Author was Gene Marshall ]
[ Posted on Fri, 25 Mar 1994 15:21:15 GMT ]
Does anyone have an IT-1 they wish sell off? I just can't bring myself
to paying list price.
Thanks,
Gene
--
+----------------------------------------------------------------------------+
|Gene Marshall \-\-\ email: genem@cup.hp.com |
|Hewlett Packard Co., MS 42UN | Tel: 408/447-5282 |
|Software Svcs & Tech. Division (SST) | ___o Fax: 408/447-5039 |
|11000 Wolfe Road L^\<._ AA6IY@N6LDL.CA.USA.NA |
|Cupertino, CA 95014 (_)/ (_) CompuServe: 75060,260 |
+----------------------------------------------------------------------------+
--
+----------------------------------------------------------------------------+
|Gene Marshall \-\-\ email: genem@cup.hp.com |
|Hewlett Packard Co., MS 42UN | Tel: 408/447-5282 |
|Software Svcs & Tech. Division (SST) | ___o Fax: 408/447-5039 |
|11000 Wolfe Road L^\<._ AA6IY@N6LDL.CA.USA.NA |
|Cupertino, CA 95014 (_)/ (_) CompuServe: 75060,260 |
+----------------------------------------------------------------------------+
------------------------------
Date: 25 Mar 1994 12:38:30 -0700
From: ihnp4.ucsd.edu!swrinde!gatech!udel!pacs.sunbelt.net!lynx.unm.edu!hydra.unm.edu!news-user@network.ucsd.edu
To: ham-ant@ucsd.edu
References <1994Mar17.105957.6324@ee.surrey.ac.uk>, <Cn0sAE.KnJ@hpqmoea.sqf.hp.com>, <Cn170q.BzH@metronet.com>ews-u
Subject : Re: Best cars for mobile HF/VHF??
In article <Cn170q.BzH@metronet.com>,
Michael Serafin <serafin@metronet.com> wrote:
>
>Hey what about a HUMMER!!
I'll let you know. I'm in the National Guard, they just replaced our
blazers with Hummers, and I'll be doing extensive research on mine
the first weekend of April. Of course if you have to BUY one... :(
------------------------------
End of Ham-Ant Digest V94 #80
******************************