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- Date: Sun, 16 Jan 94 12:30:40 PST
- From: Info-Hams Mailing List and Newsgroup <info-hams@ucsd.edu>
- Errors-To: Info-Hams-Errors@UCSD.Edu
- Reply-To: Info-Hams@UCSD.Edu
- Precedence: Bulk
- Subject: Info-Hams Digest V94 #44
- To: Info-Hams
-
-
- Info-Hams Digest Sun, 16 Jan 94 Volume 94 : Issue 44
-
- Today's Topics:
- ANS-015 BULLETINS
- BALUN problem. Was: DIPOLES FED BY LADDER LINE
- cancer from ham radio
- DIPOLES FED BY LADDER LINE (3 msgs)
- Learning Morse - which letters to start?
- Need SuperMorse
- New QRZ Ham Radio CDROM
- safety of HT antennas
- Short 160m Dipole
- WANTED: HP8640B/A signal generator
-
- Send Replies or notes for publication to: <Info-Hams@UCSD.Edu>
- Send subscription requests to: <Info-Hams-REQUEST@UCSD.Edu>
- Problems you can't solve otherwise to brian@ucsd.edu.
-
- Archives of past issues of the Info-Hams Digest are available
- (by FTP only) from UCSD.Edu in directory "mailarchives/info-hams".
-
- 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: 16 Jan 94 18:13:10 GMT
- From: news-mail-gateway@ucsd.edu
- Subject: ANS-015 BULLETINS
- To: info-hams@ucsd.edu
-
- SB SAT @ AMSAT $ANS-014.01
- AMSAT-NA OPPOSES INSTANT LICENSING
-
- HR AMSAT NEWS SERVICE BULLETIN 014.01 FROM AMSAT HQ
- SILVER SPRING, MD JANUARY 15, 1994
- TO ALL RADIO AMATEURS BT
- BID: $ANS-014.01
-
- AMSAT-NA OPPOSES FCC "INSTANT LICENSING" PROPOSAL
-
- AMSAT-NA has filed comments with the FCC in opposition to the "instant
- licensing" proposal contained in a Notice of Proposed Rule Making, PR
- Docket 93-267. Under the FCC's proposal, unlicensed persons who pass an
- amateur license examination for the first time would immediately be
- permitted to operate for up to 120 days, using self-assigned call signs,
- while waiting for their licenses to arrive.
-
- In its comments, AMSAT-NA cited the potential for abuse by persons who may
- never have had any intention of taking an examination, as well as the
- impossibility of verifying the self-assigned calls since they would not be
- registered in any database. The "guaranteed anonymity" of a self-assigned
- call sign system would, in AMSAT-NA's words, multiply the potential for
- interference by unlicensed persons with amateur radio operation. This is
- particularly relevant to the Amateur-satellite service, AMSAT-NA went on to
- say, because the 2M, 10M and 70CM bands, which presently contain the most
- popular satellite uplinks and downlinks, are also among the most likely to
- be affected by such interference. The international nature of satellite
- operation means that problems could be caused for amateurs, and govern-
- mental authorities, in other countries as well as in the United States.
-
- As an alternative to "instant licensing," AMSAT-NA urged the FCC to pursue
- the use of electronic filing and processing of amateur license applic-
- ations. AMSAT-NA's comments in PR Docket 93-267 generally paralleled those
- of ARRL, with special emphasis on the problems which would be caused for
- the Amateur-satellite service.
-
- /EX
- SB SAT @ AMSAT $ANS-014.02
- CORRECTED STS-60 KEPS
-
- HR AMSAT NEWS SERVICE BULLETIN 014.02 FROM AMSAT HQ
- SILVER SPRING, MD JANUARY 15, 1994
- TO ALL RADIO AMATEURS BT
- BID: $ANS-014.02
-
- WA5DID Provides Corrected STS-60 SAREX Keplerian Elements
-
- In last week's ANS-008 SAREX bulletin, the STS-60 keplerian elements con-
- tained an incorrect epoch date. Please use the following keplerian set
- provided by Lou McFadin (WA5DID) and Gil Carman (WA5NOM).
-
- STS-60
- 1 00060U 94034.56756353 .00033600 00000-0 25200-3 0 47
- 2 00060 57.0033 215.8607 0010675 264.1500 95.8328 15.72291901 26
-
- Satellite: STS-60
- Catalog number: 00060
- Epoch time: 94034.56756353 (03-FEB-94 13:37:17.49 UTC)
- Element set: 004
- Inclination: 57.0033 deg
- RA of node: 215.8607 deg Space Shuttle Flight STS-60
- Eccentricity: .0010675 Prelaunch Element set JSC-004
- Arg of perigee: 264.1500 deg Launch: 03-FEB-94 12:10 UTC
- Mean anomaly: 95.8328 deg
- Mean motion: 15.72291901 rev/day Gil Carman, WA5NOM
- Decay rate: 3.3600e-04 rev/day*2 NASA Johnson Space Center
- Epoch rev: 2
- Checksum: 254
-
- The AMSAT News Service would like to thank WA5DID and WA5NOM for the
- updated and corrected keplerian elements for STS-60.
-
- /EX
- SB SAT @ AMSAT $ANS-014.03
- TAPR HAS A NEW ADDRESS!
-
- HR AMSAT NEWS SERVICE BULLETIN 014.03 FROM AMSAT HQ
- SILVER SPRING, MD JANUARY 15, 1994
- TO ALL RADIO AMATEURS BT
- BID: $ANS-014.03
-
- Tucson Amateur Packet Radio (TAPR) Association Has Moved!
-
- Tucson Amateur Packet Radio has moved its offices. The new mailing address is:
-
- Tucson Amateur Packet Radio
- 8987-309 E. Tanque Verde Rd. #337
- Tucson, AZ 85749-9399
-
- The voice telephone number is (817) 383-0000. This number has a voice mail
- system attached and is available 24 hours a day. A FAX server will be
- operational within the next few weeks to automatically fax information to
- you.
-
- The incoming FAX number is (817) 566-2544.
-
- More information on the office move will be published in the Winter, 1994
- edition of Packet Status Register.
-
- [The AMSAT News Service (ANS) would like to thank Bob Nielsen (W6SWE) for
- this bulletin item. W6SWE can be reached at the following address:
- Internet: w6swe@tapr.org, or, w6swe@wb7tls.az.usa.na]
-
- /EX
- SB SAT @ AMSAT $ANS-014.04
- WEEKLY OSCAR STATUS REPORTS
-
- HR AMSAT NEWS SERVICE BULLETIN 014.04 FROM AMSAT HQ
- SILVER SPRING, MD JANUARY 15, 1994
- TO ALL RADIO AMATEURS BT
- BID: $ANS-014.04
-
- Weekly OSCAR Status Reports: 14-JAN-94
-
- AO-13: Current Transponder Operating Schedule:
- L QST *** AO-13 TRANSPONDER SCHEDULE *** 1993 Dec 27-Jan 31
- Mode-B : MA 0 to MA 180 | OFF
- Mode-B : MA 180 to MA 220 |
- Mode-S : MA 220 to MA 230 |<- S transponder; B trsp. is OFF
- Mode-BS : MA 230 to MA 250 | Blon/Blat 240/-5
- Mode-B : MA 250 to MA 256 | OFF
- Omnis : MA 250 to MA 150 | Move to attitude 180/0, 31-Jan-94
-
- L QST *** AO-13 TRANSPONDER SCHEDULE *** 1994 Jan 31-Apr 04
- Mode-B : MA 0 to MA 90 |
- Mode-BS : MA 90 to MA 120 |
- Mode-S : MA 120 to MA 145 |<- S transponder; B trsp. is OFF
- Mode-S : MA 145 to MA 150 |<- S beacon only
- Mode-BS : MA 150 to MA 180 | Blon/Blat 180/0
- Mode-B : MA 180 to MA 256 |
- Omnis : MA 230 to MA 30 | Move to attitude 240/0, Apr 04
- Poor Sun angle and battery testing need maximum OFF time.
- [G3RUH/DB2OS/VK5AGR]
-
- FO-20: The following is the current FO-20 operating schedule:
- From January '94 thru March '94, the analog mode and the
- digital mode will be on alternately for a week at a time.
- ANALOG MODE:
- 26-JAN-94 8:20 -TO- 02-FEB-94 6:50 UTC
- 09-FEB-94 7:15 -TO- 16-FEB-94 7:40 UTC
- 23-FEB-94 8:05 -TO- 02-MAR-94 6:40 UTC
- 09-MAR-94 7:05 -TO- 16-MAR-94 7:30 UTC
- 23-MAR-94 7:52 -TO- 30-MAR-94 8:15 UTC
- DIGITAL MODE: Unless otherwise noted above.
- [Kazu Sakamoto (JJ1WTK) qga02014@niftyserve.or.jp]
-
- AO-16: Operating normally. [WH6I]
-
- LO-19: Operating normally. [WH6I]
-
- KO-23: Up and running. Busy as usual. [WH6I]
-
- PoSAT: Appears to still be on it's commercial frequency. There was a
- message regarding amateur service that indicated it will be on
- amateur frequencies at the end of the month. [WH6I]
-
- ITAMSAT: On 1200 Baud, currently collecting WOD data. A note on the bird
- indicates that the BBS will return to operation soon. [WH6I]
-
- MIR: Cosmonauts Vasili Tsibliev and Alexander Serebrov returned Friday,
- 14-JAN-94, to Earth after six months in space on-board MIR Russian
- space station. The TM-17 Soyuz spacecraft landed at 08:18 UTC in
- Karaganda. The two cosmonauts have been in space from 01-JUL-93.
- The Personal Messaging System (PMS) on-board MIR continues working
- under the callsign R0MIR-1, operated by the actual crew that arrived
- last Saturday in TM-18 Soyuz. [LW2DTZ]
-
- The AMSAT NEWS Service (ANS) is looking for volunteers to contribute weekly
- OSCAR status reports. If you have a favorite OSCAR which you work on a
- regular basis and would like to contribute to this bulletin, please send
- your observations to WD0HHU at his CompuServe address of 70524,2272, on
- INTERNET at wd0hhu@amsat.org, or to his local packet BBS in the Denver, CO
- area, WD0HHU @ W0LJF.#NECO.CO.USA.NOAM. Also, if you find that the current
- set of orbital elements are not generating the correct AOS/LOS times at
- your QTH, PLEASE INCLUDE THAT INFORMATION AS WELL. The information you
- provide will be of value to all OSCAR enthusiasts.
-
- /EX
-
- ------------------------------
-
- Date: Fri, 14 Jan 1994 13:03:36 GMT
- From: elroy.jpl.nasa.gov!swrinde!emory!wa4mei.ping.com!ke4zv!gary@ames.arpa
- Subject: BALUN problem. Was: DIPOLES FED BY LADDER LINE
- To: info-hams@ucsd.edu
-
- In article <2h3omc$ag7@vixen.cso.uiuc.edu> ignacy@ux2.cso.uiuc.edu (Ignacy Misztal) writes:
- >
- >One extra question: how to feed such an antenna? If through an unbalanced
- >tuner, shack will be RF hot. If also through a balun, the balun may have
- >excessive losses and even generate harmonic. In my case, I tried to feed
- >undersized dipole on 80 through a 1 KW air balun. The balun gets warm and
- >the performance at 100W out is similar to .5W out with a regular dipol. I
- >think that at SWR 10 and above, which would be normal for a ladder-fed
- >dipole, multi-KW balun is needed to handle just 100W. The best option
- >would be a symetric tuner, which is clumsy to build. Any comments?
-
- Correct. Use of a balun is a kludge when feeding with ladder line. A
- balanced tuner is best. They aren't necessarily clumsy to build, but
- you do need some components that aren't as readily available today such
- as split stator or differential capacitors. Of course you can just
- use a swinging link, but that is clumsy.
-
- Gary
- --
- Gary Coffman KE4ZV | You make it, | gatech!wa4mei!ke4zv!gary
- Destructive Testing Systems | we break it. | uunet!rsiatl!ke4zv!gary
- 534 Shannon Way | Guaranteed! | emory!kd4nc!ke4zv!gary
- Lawrenceville, GA 30244 | |
-
- ------------------------------
-
- Date: 14 Jan 1994 11:48:01 -0800
- From: munnari.oz.au!sgiblab!swrinde!emory!europa.eng.gtefsd.com!library.ucla.edu!csulb.edu!nic.csu.net!nic-nac.CSU.net!ctp.org!not-for-mail@network.ucsd.edu
- Subject: cancer from ham radio
- To: info-hams@ucsd.edu
-
- kelvin@thed.usup.uk22.bull.co.uk (Kelvin J. Hill) writes:
- > In <taaronCJK1MF.3xr@netcom.com> taaron@netcom.com (taaron@netcom.com) writes:
- >
- >
- > >Tell me, if ham radio causes cancer, why is it that all the ham radio
- > >club meetings are filled with old people with few health problems other
- > >than normal ones for their age?
- >
- > 'Cause all the young ones have already died? :-) (I think)
- >
-
- Nahh...it's because all of the youngin's are experimenting with UHF and
- higher stuff while the OMs are chasing DX below 30 MHz :-)
-
- Perhaps having your antenna 75 feet above your head instead of six inches
- makes a difference <grin>
-
- (The above is to be taken lightly. Your mileage should not vary!)
-
- --
- Gary T. Lau, N6MMM // garlau@eis.calstate.edu
- California Technology Project/Cal State Univ. // garlau@ctp.org
-
- ------------------------------
-
- Date: Fri, 14 Jan 1994 13:28:03 GMT
- From: agate!howland.reston.ans.net!cs.utexas.edu!swrinde!emory!wa4mei.ping.com!ke4zv!gary@ames.arpa
- Subject: DIPOLES FED BY LADDER LINE
- To: info-hams@ucsd.edu
-
- In article <Pine.3.05.9401132151.A8820-a100000@booz.bah.com> k1zat@bah.COM (J. D. Delancy) writes:
- >MAYNARD@URIACC.URI.EDU (MAYNARD@URIACC.URI.EDU) wrote:
- >
- >: feed line, for 80-10 meters (much cheaper, incidently, than building
- >: from scratch with current wire prices!).
- >
- >Have you considered the possibility of using electric fence wire for
- >antenna building material? You can get a 1000 foot roll for about
- >twelve bucks from places like Southern States feedstores or probably
- >just about any farm supply house.
- >
- >I know there are gonna be some out there that will poo-poo the
- >idea of electric fence wire for antennas (it wont last, it rusts,
- >doesn't have the strength that hard drawn copper has, etc). But let me
- >tell you, I've used the same dipole on 75 made from electric fence
- >wire for 3 or 4 years without any indication of failure, stretch, rust
- >or anything else.
-
- Fence wire is 18 gauge steel, so it's conductivity for RF isn't nearly
- as good as copper stranded antenna wire. And it doesn't like to flex
- across long spans, being designed to be tightly strung between fence
- posts. But it is cheap. I've used it. I've got a quarter mile roll
- in the barn right now. There's about 10% or so more loss than copper,
- but that isn't really significant if you get 3 db or more gain from
- the larger antenna the cheap wire allows.
-
- Gary
- --
- Gary Coffman KE4ZV | You make it, | gatech!wa4mei!ke4zv!gary
- Destructive Testing Systems | we break it. | uunet!rsiatl!ke4zv!gary
- 534 Shannon Way | Guaranteed! | emory!kd4nc!ke4zv!gary
- Lawrenceville, GA 30244 | |
-
- ------------------------------
-
- Date: Fri, 14 Jan 1994 15:32:53 -0500
- From: sgiblab!sdd.hp.com!vixen.cso.uiuc.edu!howland.reston.ans.net!news.intercon.com!uhog.mit.edu!news.mtholyoke.edu!news.byu.edu!hamblin.math.byu.edu!yvax.byu.edu!cunyvm!@@munnari.oz.au
- Subject: DIPOLES FED BY LADDER LINE
- To: info-hams@ucsd.edu
-
- In article <1994Jan14.132803.10423@ke4zv.atl.ga.us>, gary@ke4zv.atl.ga.us
- (Gary Coffman) wrote, in part:
-
-
- >
- > Fence wire is 18 gauge steel, so it's conductivity for RF isn't nearly
- > as good as copper stranded antenna wire. And it doesn't like to flex
- > across long spans, being designed to be tightly strung between fence
- > posts. But it is cheap. I've used it. I've got a quarter mile roll
- > in the barn right now. There's about 10% or so more loss than copper,
- > but that isn't really significant if you get 3 db or more gain from
- > the larger antenna the cheap wire allows.
- >
-
- The loss in the steel wire ought to buy you some additional bandwidth on
- the antenna (lower Q). Note my earlier post on the 12-ga stuff we use for
- the fences: it's galvanized, and most of the current should flow in the
- zinc, with maybe even more loss, but again probably not significant.
-
- --
- 73 de John Taylor W3ZID
- rohvm1.mah48d@rohmhaas.com
-
- ------------------------------
-
- Date: Fri, 14 Jan 1994 08:12:29 -0500
- From: swrinde!cs.utexas.edu!howland.reston.ans.net!europa.eng.gtefsd.com!news.umbc.edu!eff!news.kei.com!news.byu.edu!hamblin.math.byu.edu!yvax.byu.edu!cunyvm!rohvm1!@@elroy.jpl.nasa.gov
- Subject: DIPOLES FED BY LADDER LINE
- To: info-hams@ucsd.edu
-
- In article <Pine.3.05.9401132151.A8820-a100000@booz.bah.com>, k1zat@bah.COM
- (J. D. Delancy) wrote, in part:
-
- >
- > Have you considered the possibility of using electric fence wire for
- > antenna building material?
- >
- > I know there are gonna be some out there that will poo-poo the
- > idea of electric fence wire for antennas (it wont last, it rusts,
- > doesn't have the strength that hard drawn copper has, etc). But let me
- > tell you, I've used the same dipole on 75 made from electric fence
- > wire for 3 or 4 years without any indication of failure, stretch, rust
- > or anything else.
-
- The roll of Number 12 galvanized that I picked up the other day (for
- fencing, not antennas) _will not_ stretch or break, believe me! In
- general, this stuff resists rust fairly well, whereas some of the lighter
- gauges we've used rust quickly. Of course, it's hard to straighten, and
- takes some effort to get a good solder joint.
-
- Never thought of using it for antennas, but should work. Thanks for the
- tip.
-
- --
- 73 de John Taylor W3ZID
- rohvm1.mah48d@rohmhaas.com
-
- ------------------------------
-
- Date: Fri, 14 Jan 1994 22:43:45 GMT
- From: ucsnews!newshub.sdsu.edu!usc!howland.reston.ans.net!usenet.ins.cwru.edu!news.csuohio.edu!garfield.csuohio.edu!mike@network.ucsd.edu
- Subject: Learning Morse - which letters to start?
- To: info-hams@ucsd.edu
-
- I recently passed my Tech Plus, and used the Novice morse code tapes
- you can get at Radio Shlep, about 15 bux but worth it. They are by
- Gordon West. He starts out at 0 wpm, first letter is E (.). After
- first 2 tapes you are ready for 5WPM easy. Last two tapes take you
- all the way to 13WPM. I went to first part of third tape, and
- the 5WPM test was pretty easy.
-
- --
- ^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^ Catch the WAVE v^v^v^v^v^v
- Mike Mayer - Senior Technical Support Engineer
- Visual Numerics, Inc. 32915 Aurora Rd. Suite 160, Solon OH 44139 USA
- Email: mayer@pvi.com Human: 216-248-4900 Fax: 216-248-2733
- v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^
-
- ------------------------------
-
- Date: Fri, 14 Jan 1994 19:49:09 GMT
- From: netcomsv!netcom.com!wy1z@decwrl.dec.com
- Subject: Need SuperMorse
- To: info-hams@ucsd.edu
-
- In article <2h4gpc$jg3@mailhost.interaccess.com> hopken@interaccess.com (Ken Hopkins) writes:
- >Hi Scott. I don't know where it is on internet but I do have the program.
- >If you don't find it elsewhere, let me know. I'm sure there's a way I
- >can send you a message with the file attached. I think that's called MIME.
-
- Hello right back. I'm not sure if this was directed to me, but I was
- telling someone else that they could get it on world.std.com in the
- directory pub/hamradio/pc/theory-and-morse
-
- The file is: sm404.zip (this is the latest version).
-
- But thanks anyway.
-
- >--
- > =================================================
- > Ken Hopkins WA9WCP | Internet - HOPKEN@interaccess.com
- > Disaster Team - | AMPRnet - 44.72.1.162
- > American Red Cross | AX.25 - WA9WCP@W9ZMR.IL.USA
-
-
- --
- ===============================================================================
- | Scott Ehrlich Internet: wy1z@neu.edu BITNET: wy1z@NUHUB |
- | Amateur Radio: wy1z AX.25: wy1z@k1ugm.ma.usa.na |
- |-----------------------------------------------------------------------------|
- | Maintainer of the Boston Amateur Radio Club hamradio FTP area on |
- | the World - world.std.com pub/hamradio |
- ===============================================================================
-
- ------------------------------
-
- Date: 15 Jan 1994 04:26:16 GMT
- From: munnari.oz.au!sgiblab!swrinde!cs.utexas.edu!howland.reston.ans.net!noc.near.net!news.delphi.com!gilbaronw0mn@network.ucsd.edu
- Subject: New QRZ Ham Radio CDROM
- To: info-hams@ucsd.edu
-
- >Announcing the new QRZ! Windows Ham Radio CDROM
- >
- >Well, we've finally finished it and there are a bunch of new features.
- >First off, in addition to the DOS search program, we now have a
-
- Have you corrected the birthdates. All of the listings for Rochester
- Minnesota for instance list the Birth Date as 1 day after the
- actual. How did such an error get in the thing?
-
-
- Gil Baron, El Baron Rojo, W0MN Rochester,MN
- "Bailar es Vivir"
- PGP2.3 key at key servers or upon request
-
- ------------------------------
-
- Date: 15 Jan 1994 10:08:29 +1100
- From: munnari.oz.au!newshost.anu.edu.au!sserve!pmss!sleeper!orb.apana.org.au!orb.apana.org.au!not-for-mail@network.ucsd.edu
- Subject: safety of HT antennas
- To: info-hams@ucsd.edu
-
- On a local TV current affairs program last week there was a story about
- a guy who works for Motorola testing cellular phones who has developed
- a brain tumour about his right ear. He attributes this to the cell-mutation
- effects of highly localised RF radiation emanating from the celphone
- antennas.
-
- It was stated in the story that this person was testing mobile celphones
- long before they went into production, and that the power levels used
- were much higher than are used now in commercial production.
-
- This raises questions about amateur and commercial HT's as well. I'm
- a freight train driver, and we use fixed-frequency HT's all the time for
- communication. I am considering getting an amateur license and purchasing
- a HT, so I am wondering about the health effects of having a transmitting
- antenna so close to the brain.
-
- Is there anything that can be done to minimise the ammount of RF radiated
- around the brain by handheld transmitters? Perhaps different antenna
- styles, or maybe running the output of the HT to a seperate, fixed
- antenna on a car roof? This is not very appropriate for field use, so
- what could we do to get the field strength near the brain as low as
- possible besides reducing transmit wattage.
-
- I don't necessarily believe that there are problems, but then again we
- don't really have any proof one way or the other.
-
- What do you all think? Have any of you had any minor or major health
- problems that may have been caused by using hand-held transmitters in
- close proximity to your head?
-
- I'd be interested in reading your comments.
-
- Craig, the Freight Raver.
-
- --
- Craig Dewick [Freight Raver Craig] (craig@orb.apana.org.au).
- - Swimming in the MUSIQUARIUM of Life -
- Always striving for a secure long-term future in an insecure short-term world.
-
- ------------------------------
-
- Date: Fri, 14 Jan 1994 13:30:16 GMT
- From: elroy.jpl.nasa.gov!swrinde!cs.utexas.edu!howland.reston.ans.net!pipex!uknet!doc.ic.ac.uk!syma!mpfb8@ames.arpa
- Subject: Short 160m Dipole
- To: info-hams@ucsd.edu
-
- Hi all. Wonder if anyone has ideas on this subject or practical
- experience. In my "average" town lot here in the UK I feel fortunate to
- have a 3 ele tribander on a 55ft tower with space to put up a 40m
- dipole which I occasionally convert to a 80m dipole to get on that band.
- For RSGB 160m contests I manage to get up a full size dipole by hanging
- it from the boom of my beam and trailing it all around the garden! It
- works pretty well but can't leave it up permanantly 'cos someone will
- hang themselves.
- What I would like to do is get up a 160m dipole, SHORTENED to the length
- of, say, an 80m dipole so that I could leave it up permanantly - perhaps
- fixed to a pole on the chimney.
- I have thought about inserting some L in the centre of each leg to
- effectively lengthen it but when you work out the values, the coil would
- be large / long / lots of turns if it were to be low loss / high Q.
- Wonder if anyone has any novel ideas to shorten the length of a
- the said dipole???
- Yes, I know I could load the tower / beam or even try a true
- vertical but the earth is very poor around here and verticals are
- useless. Also there would be big problems trying to get radials down so
- a dipole is the answer but it's too long!!
-
- Any ideas / comments etc would be appreciated.
- Either E-mail or post here if you think others would be interested.
-
- Tnx, GD DX and 73's...Peter, G4BVH.
-
- ------------------------------
-
- Date: 16 Jan 94 19:01:29 GMT
- From: ogicse!uwm.edu!cs.utexas.edu!math.ohio-state.edu!news.acns.nwu.edu!merle!jeanniel@network.ucsd.edu
- Subject: WANTED: HP8640B/A signal generator
- To: info-hams@ucsd.edu
-
- I am looking for HP8640B or A signal generator
-
- ------------------------------
-
- Date: 14 Jan 1994 17:44:47 GMT
- From: swrinde!cs.utexas.edu!howland.reston.ans.net!gatech!concert!inxs.concert.net!rock.concert.net!mikewood@network.ucsd.edu
- To: info-hams@ucsd.edu
-
- References <1994Jan5.125300.21517@mnemosyne.cs.du.edu>, <2guq97$mds@inxs.concert.net>, <1994Jan12.162136.17158@mnemosyne.cs.du.edu>
- Subject : Re: Repeater database?
-
- In article <1994Jan12.162136.17158@mnemosyne.cs.du.edu>,
- Jay Maynard <jmaynard@nyx10.cs.du.edu> wrote:
- >
- >> The REAL reason this information isn't given out is that
- >>Cordination Groups want to wield their coordination POWER without
- >>fear of any questioning their declarations. With all the data on
- >>a repeater (lat/lon/haat/erp , etc ) you could challenge or even
- >>ignore their refusal to coordinate a repeater on a frequency you
- >>have chosen.
- >
- >This sounds like the ravings of somoene who had a coordination denied, or who
- >wants to start a repeater war and not have the FCC come explain the situation
- >to him. You obviously have not been on the other side of the table.
- >
- Bad guess Jay. Never had one denied . I have had several "coordinated "
- over the years. Wrong on the repeater war too. I don't even use them
- locally .....just when travelling to a Hamfest in an unfamiliar area.
- Since you say I have obviously been on the opposite of the table , then
- you PROBABLY ARE on the opposite side of the table... a frequency
- coorrdinator. So I suppose you are going to tell us that you are totally
- non-political in all your decisions .....strictly first come first
- serve , etc.
-
- >> I suspect less than 1% of the so called coordinated
- >>repeaters in operation today have any sort of REAL engineering
- >>study including contour maps done on them. Most have been 'coordinated
- >>' by either first come first served ---- or Good Ole Boys Network
- >>methods.
- >
- >First come first served is the only way that coordinators can operate and not
- >get their collective butts sued off. Don't believe me? I've been there,
- >again, and so have others. As for the kind of real engineering studies you
- >advocate, do you know how much time and effort goes into producing a contour
- >map? Multiply that by a thousand repeaters in Texas. It's prohibitive. We
- >coordinate repeaters based on 85-mile seperation, and will waive that if the
- >trustee of the existing system will agree in writing.
- >
-
- I do contour studies professionally as a communications system engineer..so
- yes I DO KNOW what is involved in doing a proper study. I also
- know that a decent one can be done in an hour or so with out
- a computer..just radial lines in a topo map. If you are just
- drawing 85 mile radius circles on a map you aren't really
- coordinating ...you are just OFFICIATING. If a job is worth
- doing it should be done right.
-
-
- >>This information is publicly available for EVERY commercial radio
- >> and televion station in the USA and there is absolutely no reason other
- >>than small minded POWERMONGERING politics that this isn't available
- >>for amateur repeaters.
- >
- >How about time and money? Are you volunteering to run all those contour
- >studies, or pay to have them done?
- >
- YOU are already the volunteer. Why aren't you doing ANY kind of study?
- Why do you need HAAT if are just drawing a constant circle on a map?
- A simple contour would take an hour or so (less in FLAT areas ).
-
- Now to the meat of the matter ....the INFORMATION I am referring
- to is LAT/LON/HAAT/ERP for all the commercial stations mentioned.
- This thread is about WHY LAT/LON/HAAT/ERP info is being
- witheld by people/groups like you and yours. I am not asking
- or suggesting that engineering studies be released. JUST
- LAT/LON/HAAT/ERP.
-
- >>I dare ANY so called coordinating group to prove me wrong by PUBLISHING
- >>there engineering studies for all their "coordinated" repeaters.
- >
- >They don't exist to the degree you want, nor are they ever likely to in the
- >amateur service.
- >
- If you are just drawing 85 mi. radius circles THEY DON'T EXIST TO
- ANY DEGREE.....
-
- >>All we'll probably hear is eithe silence or a crescendo of flames
- >>about how their "integrity " has been insulted....but the engineering
- >>studies generally don't exist so we will never see them!
- >
- >No flames about integrity here; just cold, hard reality. Then again, you sound
- >like you've been hit by reality before, and didn't like it.
-
- Well the hard cold reality is coordinating groups do not want
- to publish this information because they cannot justify the
- ARBITRARY AND POLITICAL manner in which they pass out frequencies
- if the FACTS are publicly available.
-
- A final note : Until the FCC requires CTCSS (or similar) instead
- of carrier squelch on Amateur repeaters, this debate will
- continue forever. Carrier squelch repeaters are archaic and
- the root cause of many repeater interference problems.
- CTCSS is cheaper than DTMF to install/build in radios.
- Alternatively the ARRL and coordinators should make this
- part of the coordination scheme. Since there are no technical
- regulations regarding coordination it could be done.
- Again the problem is POLITICAL . EXISTING coordinated
- repeater owners and users don't want to be burdened
- by CTCSS on their repeaters and mobiles.....unless
- it's to keep out "strangers".
-
-
-
- Mike Wood Internet: mikewood@rock.concert.net
- The Signal Group
- P.O. Box 1979 ***Avoid company disclaimers by owning the company ***
- Wake Forest, NC 27588
-
- Phone: 919-556-8477 Fax: 919-556-0115
-
-
- B
- B
- B
-
- ------------------------------
-
- End of Info-Hams Digest V94 #44
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