Date: Thu, 20 Oct 94 04:30:20 PDT 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 #350 To: Ham-Ant Ham-Ant Digest Thu, 20 Oct 94 Volume 94 : Issue 350 Today's Topics: ACURATE ROTATORS ??? Antenna...kewl! Antenna design software for PC's Any MFJ-1798 Comments? Cable Experts FOR SALE: Tower and Beam Antenna Looking for RG information (2 msgs) NEC help Yaesu G5400B for Sale 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: 19 Oct 94 17:29:54 GMT From: washpenn!swider (Rob Swider) Subject: ACURATE ROTATORS ??? In article , itbkl@puknet.puk.ac.za (Keith Laaks) writes: > I read somewhere that most of the 'commercial' rotators is not capable of > rotating with an acceptable accuracy for EME. Apparently you need the > rotator to be able to rotate to within 0.5 or 0.25 of a degree (in both > planes). > > Does anybody know of a rotator that can do this? What about using a motorized telescope mount. They have the accuracy you need since amateur astronomers use them for astrophotography. I doubt that the weight would be a problem since telescopes can get very heavy. Check Sky & Telescope magazine, there should be a number of places advertising mounts. Rob washpenn!swider@uunet.uu.net ------------------------------ Date: 19 Oct 1994 19:55:38 -0400 From: c002@ns3.CC.Lehigh.EDU (David M. Roseman) Subject: Antenna...kewl! i have made and used a real nice cheap mobile antenna... all u need is a mount/spring a10957@rvtnfs01.eskom.co.za (Stan Holmes) writes: >From: a10957@rvtnfs01.eskom.co.za (Stan Holmes) >Subject: Antenna design software for PC's >Date: Wed, 19 Oct 1994 10:08:42 >Keywords: Antenna software >Hi > Can anyone tell me where I can find ANTENNA DESIGN SOFTWARE for a PC? >Thanks > Stan >stan@tri.eskom.co.za Try ELNEC. Its tried and true, easy interface and fairly utilitarian. There are numerous other packages for special purposes (e.g. yagi optimization) as well. See one of the major magazines for ads. Steven R. Jones Virginia Beach, VA ------------------------------ Date: 19 Oct 1994 14:04:20 GMT From: reichert@rtsg.mot.com (Charles H. Reichert) Subject: Any MFJ-1798 Comments? Has anyone out there obtained and tried out the MFJ-1798 80 -> 2 Meter Vertical yet. I did obtain the installation guide which doesn't give a very clear picture of the antenna. How is the performance, installation, mechanical strength, appearance, etc. I'm sure there's a lot of other hams wondering about this "vapor antenna" as I have since it was supposed to be out last March. Please reply to this group as I regularly read it. Thanks in advance, Chuck KD9JQ ------------------------------ Date: 19 Oct 1994 19:51:39 -0400 From: c002@ns3.CC.Lehigh.EDU (David M. Roseman) Subject: Cable Experts >In article <37p6bj$2q16@ns3.CC.Lehigh.EDU> c002@ns3.CC.Lehigh.EDU (David M. Ros eman) writes: >>i was wondering what the address is for the Cable experts so i can get a >>catatlog.... > >They don't really have a catalog (so the prices are lower), only a few >sheets listing their wares. > >Cable X-Perts, Inc >113 McHenry Rd. Ste 240 >Buffalo Grove, Il 60089 >708-506-1886 > ok. thanks alot for the info... DAvid |-----------------------------------------------------------------------| | David Roseman | c002@lehigh.edu | | SysOp of NODE 3 BBS | The Flying HAm - BBS | | Running OBV/2 Software | KBR-9318 - CB | | | N3SQE/SVARC - Ham | | HAmmy in IRC | N3SQE@N3IQD.FN20GO.PA.USA.NA - Packet | |-----------------------------------------------------------------------| ------------------------------ Date: 19 Oct 94 18:37:57 PST From: comet@us.oracle.com Subject: FOR SALE: Tower and Beam Antenna Tri-ex W-51 crankup tower for sale. Height 51 ft fully extended. Tower in good condition, but needs new raising cable and base. Pickup only near Half Moon Bay, CA. Asking $300 or best offer. KLM KT34 4 element triband Yagi. Complete with manuals pickup only. Asking $150 or best offer. Pickup only. Reply via email only to bwalsh@us.oracle.com ------- Thanks, -Kevin ------------------------------ Date: 19 Oct 1994 15:20:40 GMT From: tom_boza@ccm.hf.intel.com (WB7ASR) Subject: Looking for RG information Does anyone know where I can acquire a complete list of all the RG coax specifications? I mean ALL !!! Im want RG-1 throught RG-10000000 and everything in between. I need the OHM, V, and % of shelding for each RG type. Thanks, Tom WB7ASR... ------------------------------ Date: Wed, 19 Oct 1994 17:55:00 GMT From: rossi@VFL.Paramax.COM (Pete Rossi) Subject: Looking for RG information In article <383dg8$84p@chnews.intel.com> tom_boza@ccm.hf.intel.com (WB7ASR) writes: > >Does anyone know where I can acquire a complete list >of all the RG coax specifications? I mean ALL !!! > >Im want RG-1 through RG-10000000 and everything >in between. I need the OHM, V, and % of shielding for >each RG type. > >Thanks, Tom WB7ASR... Might be interesting but probably not that useful. Most of the types are probably not normally available or are very subtle variations of RG8, RG58 and RG59 types. RG8 really doesn't mean much any more. To me RG8 simply means : " Large diameter coax that is about 50 ohms " PERIOD. It says nothing about loss, velocity factor, shield type/density, dielectric, jacket type, power/voltage rating, etc. Most large coax-es these days say "RG8 TYPE" on them. That word "TYPE" makes all the difference. When you buy coax these days the only way to be safe and know what you are getting is to specify a manufacturers part number. Belden 8214, Belden 9913, etc.. The "RG" numbers are meaningless if you ask me. ---- Pete Rossi - WA3NNA rossi@vfl.paramax.com Unisys Corporation - Government Systems Group Valley Forge Engineering Center - Paoli, Pennsylvania ------------------------------ Date: Wed, 19 Oct 1994 16:53:16 GMT From: ae517@FreeNet.Carleton.CA (Russ Renaud) Subject: NEC help Is there a text file anywhere to describe all the fields for a NEC input card. I can figure some of them out for myself, ie GW, RP, etc, but it would be nice to know other possible inputs or modifiers. Also, how do you display the pattern results? I have wjgraps, but I'm not sure if I'm using it properly (no docs). Does Wires 1.5 perform the same function? Any help would be appreciated. de va3rr renaudr@tc.gc.ca ------------------------------ Date: 19 Oct 1994 11:35:34 -0400 From: mikewood@mercury.interpath.net (The Signal Group) Subject: Yaesu G5400B for Sale I have a Yaesu G5400B Az-el antenna rotor for sale. I bought the unit new from Amateur Electronic Supply several years ago but never bought any satellite capable VHF/UHF radios or antennas. The unit has been taken out of the box but has never been installed. The package includes the rotor, control box and the hardware for a complete installation. I well sell for the best reasonable offer. I will ship via UPS at your expense. Please email me only if seriously interested . Mike Wood Internet: mikewood@mercury.interpath.net The Signal Group Amateur Radio: NT4O P.O. Box 1979 ***Avoid company disclaimers by owning the company *** Wake Forest, NC 27588 Phone: 919-556-8477 Fax: 919-556-0115 ------------------------------ Date: 19 Oct 1994 17:39:45 GMT From: moritz@ipers1.e-technik.uni-stuttgart.de () References<37vjjc$8vq@newsbf01.news.aol.com> <1994Oct18.151414.7898@ke4zv.atl.ga.us>, <1994Oct19.140936.21835@arrl.org> Subject: Re: Antenna Analyzers/Old QST magazines >: VSWRs over 10:1, IE 50 db return loss. Zack, I bet its a typo. Moritz DL5UH ------------------------------ Date: 19 Oct 1994 16:37:12 GMT From: little@iamu.chi.dec.com (Todd Little) References<37tlqh$1ij2@info2.rus.uni-stuttgart.de> <380fn7$m0n@nntpd.lkg.dec.com>, <3813o2$1gd7@info2.rus.uni-stuttgart.de> Reply-To: little@iamu.chi.dec.com (Todd Little) Subject: Re: 2m quad construction - help! In article <3813o2$1gd7@info2.rus.uni-stuttgart.de>, moritz@ipers1.e-technik.uni-stuttgart.de () writes: |>>I just quickly |>>modeled a 12 element 2.5 wavelength quad and it yields a forward gain |>>figure comparable to a 2.5 wavelength K1FO design (+- .2 dB). |> |>Todd, |> |>I shall be convinced if you let me know the actual gain figure. Here is an actual NEC 2 input deck for a slightly shorter quad than the K1FO 2.5 wavelength 2 meter antenna. It yields a calculated gain of 14.4 dBi versus 14.6 dBi for the K1FO. I could optimize the design a little more for higher forward gain and a slightly cleaner pattern, but I just put this together as an example that similar length long antennas yield similar gains. Please feel free to model the antenna yourself. Have fun. 73, Todd N9MWB CM 12 element QUAD on a 6.800000m boom for 144.200000 Mhz CM Generated on Tue Oct 18 06:48:36 1994 by optimizer CE GW 1 3 0.000000 0.000000 -0.285870 0.000000 0.285870 -0.285870 0.001885 GW 1 6 0.000000 0.285870 -0.285870 0.000000 0.285870 0.285870 0.001885 GW 1 3 0.000000 0.285870 0.285870 0.000000 0.000000 0.285870 0.001885 GW 2 3 0.566205 0.000000 -0.272876 0.566205 0.272876 -0.272876 0.001885 GW 2 6 0.566205 0.272876 -0.272876 0.566205 0.272876 0.272876 0.001885 GW 2 3 0.566205 0.272876 0.272876 0.566205 0.000000 0.272876 0.001885 GW 3 3 1.132411 0.000000 -0.255984 1.132411 0.255984 -0.255984 0.001885 GW 3 6 1.132411 0.255984 -0.255984 1.132411 0.255984 0.255984 0.001885 GW 3 3 1.132411 0.255984 0.255984 1.132411 0.000000 0.255984 0.001885 GW 4 3 1.854545 0.000000 -0.262481 1.854545 0.262481 -0.262481 0.001885 GW 4 6 1.854545 0.262481 -0.262481 1.854545 0.262481 0.262481 0.001885 GW 4 3 1.854545 0.262481 0.262481 1.854545 0.000000 0.262481 0.001885 GW 5 3 2.420751 0.000000 -0.241690 2.420751 0.241690 -0.241690 0.001885 GW 5 6 2.420751 0.241690 -0.241690 2.420751 0.241690 0.241690 0.001885 GW 5 3 2.420751 0.241690 0.241690 2.420751 0.000000 0.241690 0.001885 GW 6 3 2.986956 0.000000 -0.229995 2.986956 0.229995 -0.229995 0.001885 GW 6 6 2.986956 0.229995 -0.229995 2.986956 0.229995 0.229995 0.001885 GW 6 3 2.986956 0.229995 0.229995 2.986956 0.000000 0.229995 0.001885 GW 7 3 3.605138 0.000000 -0.245588 3.605138 0.245588 -0.245588 0.001885 GW 7 6 3.605138 0.245588 -0.245588 3.605138 0.245588 0.245588 0.001885 GW 7 3 3.605138 0.245588 0.245588 3.605138 0.000000 0.245588 0.001885 GW 8 3 4.223320 0.000000 -0.224798 4.223320 0.224798 -0.224798 0.001885 GW 8 6 4.223320 0.224798 -0.224798 4.223320 0.224798 0.224798 0.001885 GW 8 3 4.223320 0.224798 0.224798 4.223320 0.000000 0.224798 0.001885 GW 9 3 4.841502 0.000000 -0.240391 4.841502 0.240391 -0.240391 0.001885 GW 9 6 4.841502 0.240391 -0.240391 4.841502 0.240391 0.240391 0.001885 GW 9 3 4.841502 0.240391 0.240391 4.841502 0.000000 0.240391 0.001885 GW 10 3 5.459684 0.000000 -0.237792 5.459684 0.237792 -0.237792 0.001885 GW 10 6 5.459684 0.237792 -0.237792 5.459684 0.237792 0.237792 0.001885 GW 10 3 5.459684 0.237792 0.237792 5.459684 0.000000 0.237792 0.001885 GW 11 3 6.077865 0.000000 -0.226097 6.077865 0.226097 -0.226097 0.001885 GW 11 6 6.077865 0.226097 -0.226097 6.077865 0.226097 0.226097 0.001885 GW 11 3 6.077865 0.226097 0.226097 6.077865 0.000000 0.226097 0.001885 GW 12 3 6.696047 0.000000 -0.232594 6.696047 0.232594 -0.232594 0.001885 GW 12 6 6.696047 0.232594 -0.232594 6.696047 0.232594 0.232594 0.001885 GW 12 3 6.696047 0.232594 0.232594 6.696047 0.000000 0.232594 0.001885 GX 100 010 GE FR 0 0 0 0 144.200000 EX 0 2 1 0 5. 0. EX 0 102 1 0 -5. 0. PT -1 PL 3 2 0 3 RP 0 1 181 1100 90. 0. 0. 1.0 EN ------------------------------ Date: Wed, 19 Oct 1994 15:57:28 GMT From: gary@ke4zv.atl.ga.us (Gary Coffman) References<37vjjc$8vq@newsbf01.news.aol.com> <1994Oct18.151414.7898@ke4zv.atl.ga.us>, <1994Oct19.140936.21835@arrl.org> Reply-To: gary@ke4zv.atl.ga.us (Gary Coffman) Subject: Re: Antenna Analyzers/Old QST magazines In article <1994Oct19.140936.21835@arrl.org> zlau@arrl.org (Zack Lau (KH6CP)) writes: >Gary Coffman KE4ZV (gary@ke4zv.atl.ga.us) wrote: > >: I have the AEA (the VHF/UHF version). It's an excellent tool, but it >: does have some limitations. The primary problem is that it can't deal >: with VSWRs over 10:1, IE 50 db return loss. That limits its usefulness >: for fine tweaking cavities and stubs. It does make rough tuning of >: duplexers really quick and easy though. > >I wonder if anyone understood this? Not me. :-) What I *meant* to say was that it can't display VSWR over 10:1 *or* return losses > 50db. The former is more of a limitation than the latter. Gary -- Gary Coffman KE4ZV | You make it, | gatech!wa4mei!ke4zv!gary Destructive Testing Systems | we break it. | emory!kd4nc!ke4zv!gary 534 Shannon Way | Guaranteed! | gary@ke4zv.atl.ga.us Lawrenceville, GA 30244 | | ------------------------------ End of Ham-Ant Digest V94 #350 ******************************