Date: Sat, 26 Mar 94 04:30:06 PST From: Ham-Ant Mailing List and Newsgroup 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: Send subscription requests to: 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 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>, , ews-u Subject : Re: Best cars for mobile HF/VHF?? In article , Michael Serafin 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 ****************************** ******************************