Date: Tue, 19 Apr 94 12:45:33 PDT 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 #112 To: Ham-Ant Ham-Ant Digest Tue, 19 Apr 94 Volume 94 : Issue 112 Today's Topics: ? About 5/8ths antenna at 900Mhz About Lightning Bolt Quad Antenna Info needed Formula for determining optimum distance between elements in a Y GAP verses Butternut Comparison Questions.. Getting ladder line out of the shack groundplane antenna for 157.32125mhz HF mobile and the HS-100 Through-the-window on a Saturn Where to get KCTracker/Tuner ? 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: Tue, 19 Apr 1994 10:14:34 -0400 From: ihnp4.ucsd.edu!galaxy.ucr.edu!library.ucla.edu!news.mic.ucla.edu!nntp.club.cc.cmu.edu!news.sei.cmu.edu!bb3.andrew.cmu.edu!andrew.cmu.edu!ee2g+@network.ucsd.edu Subject: ? About 5/8ths antenna at 900Mhz To: ham-ant@ucsd.edu Hi all! Ok, I looked in the arrl antenna book and the 1994 handbook, but neither mentions the 5/8th for 900Mhz. I can figure out the radiator length via a formula, but what is the formula for the loading coil? ! |---> radiator | {---> mysterious loading coil } | L--->coax 50 ohm Thanks N3QAT Chuck Kamas p.s I finally HEARD and decoded packets from the shuttle!! Oh boy! p.p.s I guess my theroy about it all being done out of a warehouse in Huston is disproved now. 8-<. ------------------------------ Date: Tue, 19 Apr 94 02:58:31 -0500 From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!darkstar.UCSC.EDU!news.hal.COM!olivea!news.bu.edu!noc.near.net!news.delphi.com!usenet@network.ucsd.edu Subject: About Lightning Bolt Quad To: ham-ant@ucsd.edu The best answer would probably be from Lightning Bolt itself, call them! ------------------------------ Date: 19 Apr 94 18:16:13 GMT From: news-mail-gateway@ucsd.edu Subject: Antenna Info needed To: ham-ant@ucsd.edu Hi, I am looking for a Short Wave antenna for my Sony ICF-SW77. I need a good antenna to get weak signal of BBC & VOA broadcasts which are directed to Asia. Anyone has one or knows about it, please give me suggestions and recommendations (which kind antenna I should buy). Thank you in advance for the information. kynguyen@bluefish.nosc.mil ------------------------------ Date: Tue, 19 Apr 94 09:43:20 -0500 From: ihnp4.ucsd.edu!agate!cat.cis.Brown.EDU!noc.near.net!news.delphi.com!usenet@network.ucsd.edu Subject: Formula for determining optimum distance between elements in a Y To: ham-ant@ucsd.edu George Sladic writes: >I know the driven element should be a 1/2 wavelength and the reflector 5% >longer and the director 5% shorter in a 3 element beam. How do I determine >the distance between the driven element and the parasitic elements? What >about if the yagi has more than 3 elements, say 7? Try to find YagiMax, it is on nic.funet.fi in pub/ham/antennas, and it is ymax311 oir yagim311, i cant remember... it will determine the center freq for a given deign, and optimize it for a number of goals. Not well documented, but it works. I would start with one of the template files, of which there are many. good luck, peter n1qdq ------------------------------ Date: Tue, 19 Apr 94 03:05:41 -0500 From: news.bu.edu!noc.near.net!news.delphi.com!usenet@purdue.edu Subject: GAP verses Butternut Comparison Questions.. To: ham-ant@ucsd.edu writes: >I'm always hearing talk about "longer active elements" when comparisons are >made between the GAP and Butternut series of vertical antennas. I would like >to hear from users their perspectives on these antennas and how much better >they are than a standard 1/4 wave verticle, which is what I use. Thanks in >advance. > >WL7N0 - James Wiedle I have used both the Butternut HF2V (80 and 40m 32-foot) and the big GAP vertical (the 160, 80, and 40-meter 45-foot tall one, I forget their name for it). They are both very good antennas - my experience has been very positive on both. My choice, hands down, is the GAP. It's somewhat of a pain to install (takes at least three people to do it safely) but the results are well worth it. The Butternut HF2V is great on 40 and decent on 80, but the GAP just blows it away. I worked DXCC on 80 and 40 with the GAP, running 100w or less, in a matter of a couple months of very casual operating. Also, I had no trouble working anything I could hear on 80 and 40. It's so-so on 160, but I still managed to work DX with it. If you have the room to put it up and the people to help you put it up, go for it. 73, Mike KB3RG/CU3LF/CU0WPX ------------------------------ Date: Tue, 19 Apr 1994 11:39:34 GMT From: ihnp4.ucsd.edu!swrinde!cs.utexas.edu!convex!seas.smu.edu!vivaldi!rsd0!usenet@network.ucsd.edu Subject: Getting ladder line out of the shack To: ham-ant@ucsd.edu In article <2oej7h$poq@paperboy.gsfc.nasa.gov> lvn@cen.com (Larry Novak) writes: >I use a similar technique to get my coax and ground wires out of the >shack, but I'd hate to tell you how much plastic I cut to size and then >shattered trying to drill/punch/cut holes in it. I finally resorted to >melting holes thru it with my soldering iron! Does anyone have any good >suggestions about how to stop this stuff from cracking when you're >putting holes in it? I had to get some new windows made for my boat. The good folks at Royal Plastics in Dallas did it an let me watch as they cut the lexan and drilled the holes. No cracks. So how do you do it I asked. Use DULL drill bits says he. I've tried it an it works. Sharp bits have sharp edges which catch the plastic and crack it. dave ------------------------------ Date: Tue, 19 Apr 1994 03:03:12 GMT From: ihnp4.ucsd.edu!galaxy.ucr.edu!library.ucla.edu!psgrain!nntp.cs.ubc.ca!cyber2.cyberstore.ca!nwnexus!a2i!mlyon@network.ucsd.edu Subject: groundplane antenna for 157.32125mhz To: ham-ant@ucsd.edu i have a scanner that i would like to build a groundplane antenna for. i took the bottom part of the freq range and added it to the top part of the freq range and averaged it and came up with the above posted freq. all i need to know is what is the formula to figure out the lengths of the poles that point downwards and upwards? thanx, mlyon@rahul.net -- Mike Lyon ------------------------------ Date: Mon, 18 Apr 94 21:53:00 -0400 From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!darwin.sura.net!hearst.acc.Virginia.EDU!pplace!ed.lang@network.ucsd.edu Subject: HF mobile and the HS-100 To: ham-ant@ucsd.edu Do you use a HS-100 antenna? If so on what car/truck/camper? How do you like it? I have one on the way and will be using it with a TS-50 in a 1990 Bronco, and a 1993 camper on a Ford E350 van chassis. Let me know. --- ³ SLMR 2.1a ³ KC4YLX DX-CLUSTER, Troy Va (145.09) ed.lang@pplace.com ------------------------------ Date: 18 Apr 1994 22:32:47 GMT From: ihnp4.ucsd.edu!swrinde!sgiblab!wrdis02.robins.af.mil!rcp6.elan.af.mil!ada1!edsko@network.ucsd.edu Subject: Through-the-window on a Saturn To: ham-ant@ucsd.edu I have a Larsen KG 2-70 that I want to install on my Saturn SL2. For those who aren't acquainted with the Saturn, the rear window has a black "dithered" tinting on the top and side edges. I would like to install my antenna on the upper edge of the rear window, but the mounting instructions clearly state that any window tinting or applications should be avoided. I *tried* to remove the dot-pattern tinting with a razor, but that stuff is really stuck to the window! A call to Saturn's customer service center revealed that the material is supposedly impregnated into the glass (it must etch itself into the glass). The local sales/repair outlet has not shed any light on how to remove the stuff. Are there any Saturn owners out there who have addressed the problem? If I mount the antenna on top of the tinting, will this severely impact the antenna performance? What if I lower the antenna and have it span one of the rear defroster veins? Is there some strong solvent which will remove the tinting? Thanks in advance, Ed Skochinski KE6CSY ------------------------------ Date: 19 Apr 94 16:23:55 GMT From: sdd.hp.com!cs.utexas.edu!geraldo.cc.utexas.edu!paulus@hplabs.hp.com Subject: Where to get KCTracker/Tuner ? To: ham-ant@ucsd.edu I need to get one of Kansas City Tracker / Tuner, where to get and how much it cost ? Thanks for all pointers, Paulus N5SNN -- Paulus Suryono Adisoemarta, N5SNN / YG1QN yono@ccwf.cc.utexas.edu yono@gnu.ai.mit.edu paulus@nextdown.pe.utexas.edu ------------------------------ End of Ham-Ant Digest V94 #112 ******************************