Date: Wed, 9 Nov 94 04:30:24 PST From: Ham-Ant Mailing List and Newsgroup Errors-To: Ham-Ant-Errors@UCSD.Edu Reply-To: Ham-Ant@UCSD.Edu Precedence: List Subject: Ham-Ant Digest V94 #372 To: Ham-Ant Ham-Ant Digest Wed, 9 Nov 94 Volume 94 : Issue 372 Today's Topics: 7 dB for $7 Leaning R7 Pigeons on beam Twinax for feedline 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, 8 Nov 1994 14:35:04 GMT From: bsplaine@dogxray.sr.hp.com (Bill Splaine) Subject: 7 dB for $7 : Questions: : 1) Did anybody who replied actually build it? How were your results? : Were you able to measure the gain, and did it approach 7 dB (and : is that dBd or dBi?) : 2) Did anybody capture all of the replies to a disk file? If so, : kindly reply (thru the anon-service, as instructed below). Much : appreciated to anybody who can provide this info. Jim, I *will* cooperate, no need to get fidgity about the nitro.... : I recieved a shipment of 40 pounds of nitroglycerine. If they don't : cooperate with us then we'll kill him. I spoke with a few who built it and said it is the best they have ever had in the air. Most were using big sticks like the Comet and Diamond bases. I found one fellow in my local club who built one with his son and they love it. I will build one this winter some time.... sounds like cheap fun. I live in a poor area, rf wise, and need all the help I can get. I am really like a hidden packet station, unfortunately, so the guys with more power can't hear me..... therefore, they go right over the top of me..... Where's my kw??? 73 es GL, Bill : -------- : For more information about this anonymous posting service,please send mail : to remailer@csua.berkeley.edu with Subject: remailer-info. : This message contains automatically generated keyword blocks : that have been designed to resemble a threat. These blocks : are not a statement of intent by the remailer operator or anyone else. : -------- : To respond to the sender of this message, send mail to : remailer@soda.berkeley.edu, starting your message with : the following 7 lines: : :: : Response-Key: the-clipper-key : ====Encrypted-Sender-Begin==== : MI@```$I^&2?(EY : B'L"R;[;7\*!![X:GO)Z94=QR`7U5[M+T&UG#ZE"U)1A;S@`` : ====Encrypted-Sender-End==== -- /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ \ Bill Splaine E-MAIL > bsplaine@sr.hp.com / / Hewlett Packard VOICE > (707) 577-2913 \ \ Santa Rosa, CA 95403 FAX > (707) 577-2095 / / ALL STANDARD DISCLAIMERS APPLY PACKET > N6GHG@KC6PJW \ \/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/ ------------------------------ Date: 8 Nov 1994 12:03:27 GMT From: wvanho@infinet.com (W. E. Van Horne) Subject: Leaning R7 Marq Linden (marq.linden@pcappbbs.com) wrote: : I just recently installed an R7 on my roof, and the mast that I used to : support it was from Radio Shack and although it appears to be very : strong it appears to be to narrow. : The collar that is attached to the bottom of the antenna has two rings : and the screws to tighten mast are on the same side of the ring on both : rings. Consequently when it tightens up snug it forces the antenna base : to lean slightly and by the time it reaches the top of the antenna it is : leaning about a foot. : My question is two parts will a large diameter mast eliminate this : problem? And where do I order a 4 or 5 ft mast like that? : If I could here from anyone else who has installed this antenna It would : be greatly appreciated. : Marq KA2MQF/6 I have an R-5 mounted on top of the same RS mast, and had the identical problem. I solved it with dowel sticks, 1/4", 3/8", and 1/2". I cut 12" long lengths and used them to fill in the space between the small diameter R-5 base tubing and the large diameter mast. About 9" of the dowel is down inside the mast, and 3" above. I hold them all in place with two hose clamps above the top of the mast. I won't try to draw a sketch using ASCII characters :-). I think you see the point. Good luck! 73, Van - W8UOF * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * It ain't wot ya don't know 't gets ya into trouble. * * It's wot ya know 't ain't true. - "Mr. Dooley" * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * wvanho@infinet.com ------------------------------ Date: 8 Nov 1994 17:06:29 GMT From: mconner@rain.atms.purdue.edu (Mark D. Conner) Subject: Pigeons on beam In article <39o8pb$8iv@newsbf01.news.aol.com> dbotkin@aol.com (D Botkin) writes: >In article <9411071629.AA13018@royac4.royac.iac.es>, >hosinsky@royac4.royac.iac.ES (goran hosinsky) writes: > > Does anyone have an idea how to protect a beam from pigeons? > >I saw a picture in QST (I think) of a good idea - a guy put a plastic owl >on top of his beam. Says the pigeons have left and never returned. The >owl came from a garden supply store, intended for use to keep birds & >bunnies from gardens, and looked quite realistic. Must be very realistic or the pigeons are easily fooled. Most of the plastic owls I've seen have pigeon **** all over them. Supposedly the eyes make or break the "decoy". If they're glass or are otherwise shiny, that does better than an owl with a painted face and eyes. -- Mark D. Conner - N9XTN Opinions expressed here are Dept. of Earth & Atmospheric Sciences not necessarily those of the Purdue Univ., W. Lafayette IN 47907 Government, DoD, Purdue, or mconner@rain.atms.purdue.edu the author. ------------------------------ Date: Mon, 7 Nov 1994 08:08:44 GMT From: wa2ise@netcom.com (Robert Casey) Subject: Twinax for feedline In article <39ht1g$o99@monopoly.callamer.com> choffman@pinot.callamer.com (Christopher R. Hoffman) writes: >Can anyone tell me if Networking TWIN-AX can be used as an unbalanced >feeder? I salvaged a few hundred feet from a network overhaul this >summer. > >For those of you who don't know, This is comparable to RG8, accept that >it has TWO inner conductors instead of one. This is used primarily for >IBM networks. > If you have a transmatch with balanced output, maybe you can feed a dipole using the twin-ax. One inner conductor to one leg of the dipole, other inner conductor to the other leg. Shield not connected to the dipole. Or a folded dipole if the twinax impedance is around 200-300 ohms. If no transmatch, maybe a balun going from 50 ohms to 200 ohms? ------------------------------ End of Ham-Ant Digest V94 #372 ******************************