Date: Sat, 9 Jul 94 04:30:19 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 #216 To: Ham-Ant Ham-Ant Digest Sat, 9 Jul 94 Volume 94 : Issue 216 Today's Topics: How to repair TV antenna? Loop Antenna using SGC 230 need 80 meter dipole help subscribe 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: 9 Jul 1994 06:48:12 GMT From: ihnp4.ucsd.edu!swrinde!gatech!concert!hearst.acc.Virginia.EDU!portal.gmu.edu!mason1.gmu.edu!sjaves@network.ucsd.edu Subject: How to repair TV antenna? To: ham-ant@ucsd.edu I have a roof mount, Yagi-style, UHF-VHF-FM TV antenna with some bent elements. They are made of aluminum formed into a tubular shape. If I try to bend them back into shape they break. Is there a way to repair/replace these elements or do I have to buy a whole new antenna. Thanks for any help. ------------------------------ Date: Fri, 8 Jul 1994 22:04:59 GMT From: usc!nic-nac.CSU.net!charnel.ecst.csuchico.edu!yeshua.marcam.com!zip.eecs.umich.edu!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!torn!news.unb.ca!coranto.ucs.mun.ca!nstn.ns.@@ihnp4.ucsd.edu Subject: Loop Antenna using SGC 230 To: ham-ant@ucsd.edu In article <1994Jul7.205116.8695@schbbs.mot.com>, RGAB10@waccvm.corp.mot.com (Steve Springer) wrote: > I am considering the purchase of the SGC 230 antenna coupler using > it with a small loop for a transmission/receiving antenna. Since the > loop is directional, I would mount it on a rotator to take advantage > of the inherent gain. Does anyone have experience with this type of > configuration? How well does it work over the 160 to 10 meter bands? > I've heard good things about the coupler, but not in this particular > application. Thanks for any comments > > Steve K3NPK I use some kind of delta loop on my boat with a SGC 230. I feed the backstay of the boat wich is connceted to the top of the 35 ft mast which is connected to the keel. The ground side of the tuner is also connected to the keel. I use it regularly with good results on 80 thru 20 M. It loads well on all bands but i think it becomes quite directionnal on 14 mHz and up. Jean-Marie VE2AEY ------------------------------ Date: 8 Jul 1994 16:31:46 -0700 From: ihnp4.ucsd.edu!swrinde!gatech!newsxfer.itd.umich.edu!zip.eecs.umich.edu!yeshua.marcam.com!charnel.ecst.csuchico.edu!psgrain!news.tek.com!cascade.ens.tek.com!not-for-mail@network.ucsd.edu Subject: need 80 meter dipole help To: ham-ant@ucsd.edu >> I am looking for information on how to construct a small >> 80 meter dipole. Due to the size of my lot I can not support >> anything longer then 60 to 70 feet. ....................... > > >>Cut a dipole (Inv. Vee?) for 40M. I wound 2 END LOADING coils; 200 turns >of #18 magnet wire on a 1" PVC form (about 12 inches long total). Wind the >turns close-spaced. Attach each coil to end of the 40M dipole. Add about >24-36inches of 'dangler' wire to other end of each coil, you will use this >to tune the antenna to resonance. Mine were about 26" long each. The 2:1 >SWR b/w was about 120Khz, not bad for a short dipole. I eventually use >alligator clips on my danglers to re-tune the antenna from the SSB to >CW section. Try it, you'll be pleasantly surprised. You get an added >bonus: it still resonates on 40M! The coils act as traps on 40! > The thought occurs to me that it would probably be easier to tune as well as more efficient to make the 40 meter dipole, then add the coils on the ends with more wire off the ends, then JUMPER the coil to bring the antenna into resonance on 80 meters. That way you would have less of a compromise antenna (closer to full size) and less loss in the coils (heating loss). Also, talking about W9INN (think that's correct) I have had good luck with his 40/80 meter 1/4 wavelength sloper. Think it might have had 160 meters on it too. Been a long time since I had it up in Aloha, OR. But anyway I was impressed with the simplicity of the antenna as well as the good service from the manufacturer. Terry, KI7M ------------------------------ Date: 9 Jul 94 11:52:16 GMT From: news-mail-gateway@ucsd.edu Subject: subscribe To: ham-ant@ucsd.edu subscribe hnelson@facstaff.wisc.edu ------------------------------ End of Ham-Ant Digest V94 #216 ******************************