Date: Wed, 14 Sep 94 04:30:22 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 #308 To: Ham-Ant Ham-Ant Digest Wed, 14 Sep 94 Volume 94 : Issue 308 Today's Topics: AOP-2 opinion? Q: Gain, and beam width Slinky antenna anyone? (2 msgs) 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: Sat, 10 Sep 1994 21:10:00 GMT From: agate!howland.reston.ans.net!swiss.ans.net!malgudi.oar.net!infinet!n8emr!gws@ames.arpa Subject: AOP-2 opinion? To: ham-ant@ucsd.edu Anyone had a chance to take a look at the cushcraft AOP-2 oscar array? I have the AOP-1 array but have it down for repairs and figured I might as well update. From the ads I have seen it look like a couple more elements on 2mters and a much larger antenna on 440. comments -- Gary W. Sanders gws@n8emr.cmhnet.org, 72277,1325 N8EMR @ N8JYV (ip addr) 44.70.0.1 [Ohio AMPR address coordinator] HAM BBS 614-895-2553 (1200/2400/V.32/PEP) Voice: 614-895-2552 (eves/weekends) ------------------------------ Date: 13 Sep 1994 03:24:13 GMT From: dog.ee.lbl.gov!overload.lbl.gov!agate!howland.reston.ans.net!vixen.cso.uiuc.edu!news.uoregon.edu!usenet.eel.ufl.edu!piaget.moe.ac.sg!raffles.technet.sg!nuscc.nus.sg!@@ihnp4.ucsd.edu Subject: Q: Gain, and beam width To: ham-ant@ucsd.edu The edge of the spot beam is where the 3 dB power is. But what is the spot beam cast on? Does it refer to a flat sheet perpendicular to the transmission path or is it casted onto an area on a sphere radius = transmission path? Would appreciate if someone can help me. Chee Leong ------------------------------ Date: Mon, 12 Sep 1994 17:04:24 EDT From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!noc.near.net!saturn.caps.maine.edu!maine.maine.edu!jbaack31@network.ucsd.edu Subject: Slinky antenna anyone? To: ham-ant@ucsd.edu Hi all, I recently saw in an old QST issue, Oct.1980, to be precise, a ad for a slinky style antenna for 80/75, 40 and 20 meters. It used a 6 turn balun between the lengths of slinky material. I guess to tune the antenna you either stretched out the material or you let it compress. Has anyone ever hear d of such a thing? Has anyone used it? 73's Jason N1RWY JBAACK31@Maine.maine.edu "looking for new ways to get that signal out..." ------------------------------ Date: 13 Sep 1994 12:57:52 GMT From: news.ingr.com!b17news!monty.b17b.ingr.com!gjmontll@uunet.uu.net Subject: Slinky antenna anyone? To: ham-ant@ucsd.edu In article <94255.170424JBAACK31@MAINE.MAINE.EDU>, writes: |> Hi all, I recently saw in an old QST issue, Oct.1980, to be precise, |> a ad for a slinky style antenna for 80/75, 40 and 20 meters. It used a 6 turn |> balun between the lengths of slinky material. I guess to tune the antenna you |> either stretched out the material or you let it compress. Has anyone ever hear |> d of such a thing? Has anyone used it? |> I tried one of them back in '76 when I lived on the second floor of an apartment. It was a waste of time. I'd have to check my old logs to see if I ever actually worked anybody thru the slinky. Tuning it consisted of stringing out the supporting nylon line, then streching the slinky portion out and clipping it in place. Then you shorted out some number of turns at each end. (Then hope the SWR was not off-scale, and try again.) If you've ever played with a simple slinky, you know how it can get a twist or kink in the coils that must be backed out. Imagine the mess when you have two slinkys, connected end to end, with the coax cable attached. Now add the light nylon cord running through the entire contraption! Why are you making me recall these nightmares? 73 Greg AC4WF -- Gregory Montllor GIS Projects / Geo Systems / Solution Engineering Div mailstop IW17B4 Intergraph Corp. Huntsville, Alabama USA 35894-0001 email: gjmontll@ingr.com phone: (205)730-7249 fax: (205) 730-1263 ------------------------------ End of Ham-Ant Digest V94 #308 ******************************