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- Date: Sun, 16 Jan 94 06:15:11 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 #42
- To: Info-Hams
-
-
- Info-Hams Digest Sun, 16 Jan 94 Volume 94 : Issue 42
-
- Today's Topics:
- cancer from ham radio
- Dipole Antenna
- Examination Opportunities Scheduled 1/06/94 to 4/25/94
- FY5FY ?
- HDN Releases
- MODS wanted for ALL radio
- Need manuals for TS430/AT250/PS430
- Protable 2m Antenna for Mountaneering ???
- Repeater Interference
- selling gear group ?
- This Week in Amateur Radio Edition #42
- Toyota & Ham rigs
- Unix ham radio control program
- Wanted: Ten Tec Argosy
-
- 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: 14 Jan 94 12:12:05 GMT
- From: swrinde!cs.utexas.edu!howland.reston.ans.net!noc.near.net!news.delphi.com!BIX.com!arog@network.ucsd.edu
- Subject: cancer from ham radio
- To: info-hams@ucsd.edu
-
- 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?
-
- >Travis Wise
- >KB8FOU
- >18 yrs old
- >General class
-
- >--
-
- >Travis A. Wise KB8FOU
- >1421 Grace Avenue Senior, Del Mar High School
- >San Jose, CA 95125-5206 (408) 383-8570
- >taaron@netcom.com
-
-
- A more likely (than RF) reason for lots of folks in 'electronics'
- *Perhaps* showing a higher cancer rate than the general population
- is the assorted chemistry that we have all but *bathed* in over
- the years... carbon-tet, benzine, you.name.it, we all used it
- all of the time to do all maner of things... and *WHAT* ventilation.
-
- .......................................
- Alan Ogden, w6spk
- Moderator of ham.radio at BIX
- arog@BIX.com
-
- ------------------------------
-
- Date: Fri, 14 Jan 1994 19:14:40 GMT
- From: wri!pea@uunet.uu.net
- Subject: Dipole Antenna
- To: info-hams@ucsd.edu
-
- Can someone give me a little advice on this:
-
- I want to hang an inverted V dipole cut for 160m. Apex will
- be approximately 60' and the ends will be about 20' rfom the
- ground.
-
- My question is, can I use twinlead to feed this with and run
- it through a balanced antenna matcher and be able to work
- 160m through 10m with half way decent performance??
-
- My rig is an ICOM IC-740.
-
- Thanks for the help!
-
- Bruce
-
- ------------------------------
-
- Date: 15 Jan 1994 03:23:29 GMT
- From: munnari.oz.au!sgiblab!sdd.hp.com!math.ohio-state.edu!howland.reston.ans.net!gatech!usenet.ufl.edu!mailer.acns.fsu.edu!freenet2.scri.fsu.edu!twright@network.ucsd.edu
- Subject: Examination Opportunities Scheduled 1/06/94 to 4/25/94
- To: info-hams@ucsd.edu
-
- twright@freenet.scri.fsu.edu (Tim Wright) writes:
- > Amateur Radio <ARRL-VE> testing will be conducted Sunday February 6th,
- > 1994 at 13:00 hrs EST at the Morehead/Rowan County D.E.S. Building
- > US 32 connector road Morehead, Ky.
- >
- > All license classes will be tested. Please bring 2 forms of ID, one
- > with a current photo and any CSCE's.
- >
- > This testing session is contingent to the weather.
- > Talk in freq: 146.910- the K4GFY Repeater
- >
- > For further information contact:
- > Steven "Buck" Duley ARRL-VE KA4DRZ
- > (606) 674-6815
- >
- > For KA4DRZ de Tim Wright KD4OVM
- > --
- Walk-ins are accepted and welcomed. This is not the session being
- held in Maysville, ky the same day. For more information call
- Steven "Buck" Duley ARRL-VE KA4DRZ
- 1(606) 674-6815
-
- Tim KD4OVM
-
- The above posting is in regards to a post received from ARRL HQ.
- --
-
- ------------------------------
-
- Date: 13 Jan 94 11:41:58 GMT
- From: ucsnews!newshub.sdsu.edu!usc!howland.reston.ans.net!europa.eng.gtefsd.com!emory!news-feed-2.peachnet.edu!news-feed-1.peachnet.edu!concert!news.duke.edu!duke!wolves!psybbs!fredmail@network.ucsd.
- Subject: FY5FY ?
- To: info-hams@ucsd.edu
-
- Back in CQ WW SSB, I worked someone I wrote in the log as
- FY5FY. Since then, though, I haven't been able to find a
- QSL route for him, and I'm starting to think I got the call wrong.
-
- He's not in the '93 CB, and I haven't seen the call in the DX
- colums of the various magazines.
-
- As I said, I'm afraid it's just a busted call.
- But just in case (I've asked in a bunch of Fido/usenet
- areas before): Does anybody have a route for FY5FY?
-
- Thanks!
-
- Ken, AC4RD, in Raleigh, NC
- ken.kuzenski@psybbs.durham.nc.us
- or Fidonet 1:3641.1
-
-
- ------------------------------
-
- Date: 14 Jan 94 12:37:23 GMT
- From: munnari.oz.au!sgiblab!sgigate.sgi.com!olivea!spool.mu.edu!howland.reston.ans.net!gatech!concert!news.duke.edu!duke!wolves!psybbs!fredmail@network.ucsd.edu
- Subject: HDN Releases
- To: info-hams@ucsd.edu
-
- on <Jan 08 05:28>, Lee Laird to All said:
-
- LL> Files are available via Anonymous-FTP from ftp.fidonet.org
- LL> IP NET address 140.98.2.1 [...]
-
- LL> Files may be downloaded via land-line at (214) 226-1181 or (214)
- LL> 226-1182. 1.2 to 16.8K, 23 hours a day .
-
- Can us bothersome little Fido points f'req from there?
-
- Hiya, Lee! 73 de AC4RD!
-
- ------------------------------
-
- Date: 14 Jan 1994 20:49:37 GMT
- From: ucsnews!newshub.sdsu.edu!usc!howland.reston.ans.net!noc.near.net!chaos.dac.neu.edu!chaos.dac!wy1z@network.ucsd.edu
- Subject: MODS wanted for ALL radio
- To: info-hams@ucsd.edu
-
- I want to compile as complete a library of mods for every shortwave radio,
- ham radio, and scanner.
-
- Once collected, they will each be placed into their respective locations
- according to manufacturer in the ham radio FTP area on world.std.com.
-
- Any pointers to FTP, FSP, mailserver, World Wide Web, and Gopher
- sites, as well as whatever else you can offer would be greatly
- appreciated!
-
- Thanks much!
-
- Scott
-
-
- --
- ===============================================================================
- | 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: Sat, 15 Jan 1994 03:15:17 GMT
- From: munnari.oz.au!sgiblab!swrinde!cs.utexas.edu!howland.reston.ans.net!usenet.ins.cwru.edu!nigel.msen.com!yale.edu!cs.yale.edu!csusys.ctstateu.edu!white@network.ucsd.edu
- Subject: Need manuals for TS430/AT250/PS430
- To: info-hams@ucsd.edu
-
- Looking for the following manuals, or info on where I can
- obtain them:
-
- Kenwood TS-430 SERVICE MANUAL
- Kenwood AT-250 OPERATING MANUAL and SERVICE MANUAL
- Kenwood PS-430 OPERATING MANUAL and SERVICE MANUAL
-
- Any help, leads, offers to copy, etc. appreciated. Email
- to WHITE@CSUSYS.CTSTATEU.EDU 73 N1QVE Harry
-
- ------------------------------
-
- Date: 16 Jan 94 11:38:29 GMT
- From: news-mail-gateway@ucsd.edu
- Subject: Protable 2m Antenna for Mountaneering ???
- To: info-hams@ucsd.edu
-
- Responding to Davi Mercer's (mercer@dgs.dnd.ca) inquiry about a portable
- antenna for backpacking ....
-
- The February 1992 issue of 73 AMATEUR RADIO TODAY has an
- article by John Post, KE7AX, describing a "Copper Cactus" J-pole
- VHF/UHF antenna project made from common 1/2" copper plumbing
- pipe, that I constructed for both base station and portable use.
- The portable version comes apart in sections of about 20" in
- length, and weighs approximately 2 lb's, including a folding
- wooden base consisting of crossed foot-long sticks penetrated by
- a 4" long 3/8" bolt (with nut) that slides into the antenna's
- bottom pipe.
-
- When assembled the J pole is a few inches longer than 5 ft.,
- and it does not need an additional ground plane.
-
- I could have made the antenna's sections even shorter,
- perhaps 10", for easier carrying. You might want to forego a
- base and drill a hole near the top of the antenna so it can be
- hung by a string or plastic tie from a tree limb, etc.
-
- The article does not describe sectioning the J pole for
- portable use, but this type of application is obvious. In the
- portable unit I built, each section attaches to its mate by means
- of copper pipe couplings. I sweat soldered a coupling onto one
- end of each pipe segment, and slit the open end of the coupling
- with a hacksaw to make a compressible joint for the adjoining
- pipe. I tighten the slotted end of the coupling securely over the
- next pipe with a small stainless steel hose clamp.
-
- If you have ever done any plumbing with copper pipe,
- construction is quick and simple. (I suggest that you wash each
- pipe solder joint with baking soda to neutralize the acid flux
- residue.) As I recall, the portable antenna cost about $10 for
- parts, and they were readily available.
-
- I do not have any gain measurements, but I can attest that
- the antenna has worked well for me in the field.
-
- Good luck.
-
- --- Andy (acornwal@fox.nstn.ns.ca)
- Andrew Cornwall
- Nova Scotia Department of Education
- Nova Scotia, Canada
-
- ------------------------------
-
- Date: 16 Jan 94 05:51:00 GMT
- From: news-mail-gateway@ucsd.edu
- Subject: Repeater Interference
- To: info-hams@ucsd.edu
-
- Text item: Text_1
-
-
- From: tijc02!eri316@uunet.uu.net
- Subject: Repeater Interference
- >local machines UNkeyed, up would pop a blip on that frequency which then
- >drifted down the band. Sometimes a leisurely drift, sometimes an eye-popping
- >zip.--Ed
-
- I have seen similar symptoms before and it was an oscillation in the
- final amplifier. As long as the XTAL-controlled input RF is driving
- the amplifier, it functions normally. But when the drive is removed,
- it continues in an oscillator mode. Remember, an amplifier with a gain
- greater than one will oscillate if the output and input are properly
- (improperly?) phased. Coax can act as a phase-shifting stub leading to
- oscillation. I once quickly solved a problem like this by switching
- power off the final amp during receive.
-
- 73, Cecil, kg7bk@indirect.com (I do not speak for Intel)
-
- ------------------------------
-
- Date: 15 Jan 1994 02:39:37 GMT
- From: munnari.oz.au!sgiblab!sgigate.sgi.com!olivea!spool.mu.edu!howland.reston.ans.net!europa.eng.gtefsd.com!news.umbc.edu!haven.umd.edu!cville-srv.wam.umd.edu!ham@network.ucsd.edu
- Subject: selling gear group ?
- To: info-hams@ucsd.edu
-
- In article <mike711CJn3B3.929@netcom.com>,
- Michael S. Wells <mike711@netcom.com> wrote:
- >Is there an amateur radio newsgroup where for sale equipment is posted ?
- >
- Yup. Rec.radio.swap has a lot of ham gear for sale, and some will
- occasionally pop up in rec.radio.amateur.equipment, although the latter
- is supposed to be a discussion group, not a "for sale" group.
-
-
- --
- 73, _________ _________ The
- \ / Long Original
- Scott Rosenfeld Amateur Radio NF3I Burtonsville, MD | Live $5.00
- WAC-CW/SSB WAS DXCC - 123 QSLed on dipoles __________| Dipoles! Antenna!
-
- ------------------------------
-
- Date: 15 Jan 94 03:09:10 GMT
- From: cantaloupe.srv.cs.cmu.edu!das-news.harvard.edu!noc.near.net!news.delphi.com!usenet@cs.rochester.edu
- Subject: This Week in Amateur Radio Edition #42
- To: info-hams@ucsd.edu
-
- Here is a summary of news items covered on Edition #42 of "This Week in
- Amateur Radio", North America's satellite-delivered audio bulletin service,
- for the week ending 21-Jan:
-
- 1. New Jersey Amateurs Meet with Officials to Block State RF Regulation
- 2. ARRL Proposes Lifetime Operator Licenses, Station License Term Unchanged
- 3. League Refiles Opposition to West Carolina "Instant License" Proposal
- 4. Contest Advisory Committee Suggests VHF Contest "Rover" Rule Changes
- 5. Rich Moseson, NW2L, in Line for Award for "Ham Radio Horizons" Video
- 6. NASA Select TV on New Satellite Transponder, Carries SAREX Coverage
- 7. "The RAIN Dial-up" from Chicago
- 8. Nominations Opened for DARA "Hamvention" Awards, Due by March 1st
- 9. Terry Estes, WB4ASZ, Resigns as Kentucky District Director of SERA, Inc.
- 10. "EZSATS" with Dave Mullenix, N9LTD
- 11. New Crew Launched, Successfully Docked with MIR Space Platform
- 12. "Gateway 160 Meter Net Report" with Vern Jackson, WA0RCR
- 13. Special Event Stations and DX Activities with Adrian Sebborn, N1JWO
- 14. Weekly Propagation Forecast with George Bowen, N2LQS
- 15. Long Island Hams Fight Hempstead, NY Zoning Decision, Form "RADIO"
- 16. "DXing the AM and FM Broadcast Bands" - Second in a Series
- 17. "Amateur Radio Newsline" from Los Angeles - Edition #857
- 18. Superball Balloon Crashes in Utah Mountains, Beacons Still Operating
- 19. Washington Amateur Warns of Havoc Created by PK-232 Reverse Forwarding
- 20. "Radio Watchers" Newsletter Solicits SWLs/Reporters
- 21. Interest in "Morse Telegraph Line" Commemorative Postage Stamp Increases
-
- Funding for the program's transmission costs and production expenses were
- provided this week by a grant from the Southern Wisconsin Repeater Group of
- Madison, Wisconsin, which carries "This Week in Amateur Radio" on 443.400 MHz
- in Madison, 443.675 MHz in North Freedom, and 53.090 MHz in Fort Atkinson.
-
- "This Week in Amateur Radio" is a weekly amateur radio news and information
- service, in audio newsmagazine format, which is produced by Community Video
- Associates, Inc., a non-profit, charitable, tax-exempt foundation based in
- Albany, New York. The program is carried on the "Omega Radio Network" each
- Saturday at 7:30 PM (EST) on the Galaxy III commercial communications
- satellite, transponder 17 (9H), 5.8 MHz wideband audio (4.040 GHz), located at
- 93.5 degrees west longitude in geosynchronous orbit, and can be heard on
- various VHF/UHF repeaters throughout the United States and Canada, as well as
- on 160 meters. Contact your local amateur radio club or repeater operator if
- "This Week in Amateur Radio" is not being heard in your area.
-
- Production and transmission expenses are underwritten by contributions from
- repeater system operators, amateur radio clubs, and individuals. For further
- information, contact Stephan Anderman, WA3RKB, at 518/877-7374, George Bowen,
- N2LQS, at 518/283-3665, or Adrian Sebborn, N1JWO, at 413/458-8219. You may
- also reach them via amateur packet @ WA2UMX.#ENY.NY.USA.NA and on various
- landline bulletin board services.
-
-
- ------------------------------
-
- Date: 14 Jan 1994 08:57:18 -0500
- From: swrinde!cs.utexas.edu!utnut!torn!nott!gandalf.ca!gandalf.ca!not-for-mail@network.ucsd.edu
- Subject: Toyota & Ham rigs
- To: info-hams@ucsd.edu
-
- Recently there was a thread on toyotas & ham rigs.
- Apparently, our news feed doesn't keep articles around
- very long, and these messages had expired. If someone
- could re-post the key messages, I'd appreciate it.
-
- ------------------------------
-
- Date: Fri, 14 Jan 1994 05:00:30 GMT
- From: haven.umd.edu!darwin.sura.net!news-feed-1.peachnet.edu!concert!xanth.cs.odu.edu!lll-winken.llnl.gov!taurus.cs.nps.navy.mil!news@purdue.edu
- Subject: Unix ham radio control program
- To: info-hams@ucsd.edu
-
- In <2h44gk$f2n@hpchase.rose.hp.com>, cmoore@mothra.rose.hp.com (Chris Moore) writes:
- >As an offshoot of my project of writing an X11 logging program, I've decided
- >I'd like to tackle writing a generic radio control program for Unix-like
- >systems. My idea is something like this:
- > - A server process could be configured with information about what kind(s)
- > of radio(s) you have, what serial ports to use, etc.
- > - The server would accept connections from other processes that want
- > to interface with the radio.
- > - The server would communicate with the processes using some kind of
- > generic radio control protocol.
-
- In addition to mode and frequency, you should also consider bandwidth.
- Not all radios will allow setting all frequencies, modes, and bandwidths,
- so you'll need some way to present the user with exactly what options
- are available for each radio that is controlled.
-
- P.J. Rovero Internet: rovero@oc.nps.navy.mil
- NPS Code OC/Rv Packet: kk1d@k6ly
- Monterey, CA
-
- ------------------------------
-
- Date: 14 Jan 1994 14:12:15 -0600
- From: ucsnews!newshub.sdsu.edu!usc!cs.utexas.edu!not-for-mail@network.ucsd.edu
- Subject: Wanted: Ten Tec Argosy
- To: info-hams@ucsd.edu
-
- Wanted:
-
- Ten Tec Argosy in good condition.
-
- 73,72
-
- Jeff, AC4HF
- JMG@TNTECH.EDU
-
- ------------------------------
-
- Date: Fri, 14 Jan 94 20:22:22 GMT
- From: mnemosyne.cs.du.edu!nyx10!jmaynard@uunet.uu.net
- To: info-hams@ucsd.edu
-
- References <2guq97$mds@inxs.concert.net>, <1994Jan12.162136.17158@mnemosyne.cs.du.edu>, <2h6lmf$qk4@inxs.concert.net>
- Subject : Re: Repeater database?
-
- In article <2h6lmf$qk4@inxs.concert.net>,
- W. M Wood -- The Signal Group <mikewood@rock.concert.net> wrote:
- > 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.
-
- Yes, I have been a coordinator, and yes, I am a director of a coordinating
- body. Yes, I'm going to tell you that I don't make coordination decisions
- politically, for that leads to lawsuits. I make coordination decisions
- according to the rules set down for everyone to follow. There's one situation
- right now that's clobbering a repeater for which I'm the trustee, and I'm
- going to have to back out of the discussion when it gets to the board;
- further, I'm not going to try to influence the board's decision.
-
- The simplest way to stay out of trouble is to follow the rules. Period. No
- politics, no favoritism, no under-the-table deals. The last thing I want is
- trouble, so I do all of those.
-
- >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.
-
- Why not volunteer to do it, then? Or is it simply easier to bitch?
-
- >YOU are already the volunteer. Why aren't you doing ANY kind of study?
-
- The 85-mile rule was found to fit the conditions of Texas very well. There
- would not be any significant changes if we were to study repeaters
- individually, but a massive proliferation of work.
-
- >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.
-
- As I've said: we got the information in confidence. The trustees would simply
- not give it to us if we were to pass it out to every Tom, Dick, and Harry who
- asked. We would be violating our confidence to release it. Do you break
- promises and expect to have folks trust you again? This is exactly the issue
- here.
-
- Besides, you WERE demanding the engineering studies:
-
- >>>I dare ANY so called coordinating group to prove me wrong by PUBLISHING
- >>>there engineering studies for all their "coordinated" repeaters.
-
- >If you are just drawing 85 mi. radius circles THEY DON'T EXIST TO
- >ANY DEGREE.....
-
- By your standards, maybe not. The process happens to work, though, even
- without your mountain of paperwork.
-
- >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.
-
- Sorry, but "first come, first served" is not arbitrary. I defy you to
- demonstrate a single incident where politics influenced the Texas VHF-FM
- Society's decisions in coordination. (I can't answer for other organizations.)
-
- Why, exactly, are you ranting? Is there a decision you don't like, and are
- looking for ammunition to fight? Are you on the outs with SERA (or whoever
- does coordination in North Carolina)? You're screaming far too loudly for
- someone who merely wants to see a process improve; there must be some personal
- conflict involved. If not, could you try not to YELL EVERY TIME YOU WANT TO
- MAKE A POINT?
-
- >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".
-
- PL is something that the majority of hams could use today; nearly every radio
- built in the last 10 years has a PL encoder built in. You're right in that
- it's a political problem, but I don't see the problem you think it's a panacea
- for. In particular, PL will not allow stacking repeaters closer together; that
- would cause interference that most users, never mind trustees, would find
- unacceptable.
-
- It has been suggested that PL be a mandatory part of the coordination process
- in Texas. The proposal was soundly defeated by the Society's membership. We
- can't impose that requirement unilaterally, much as we can't impose other
- things unilaterally. It's called "being responsive to the membership". Just in
- case you've missed my mentioning it in other messages, membership is open to
- any licensed amateur radio operator.
- --
- Jay Maynard, EMT-P, K5ZC, PP-ASEL | Never ascribe to malice that which can
- jmaynard@oac.hsc.uth.tmc.edu | adequately be explained by stupidity.
- "A good flame is fuel to warm the soul." -- Karl Denninger
-
- ------------------------------
-
- Date: 14 Jan 1994 15:33:23 -0800
- From: nntp.crl.com!crl2.crl.com!not-for-mail@decwrl.dec.com
- To: info-hams@ucsd.edu
-
- References <1994Jan12.031818.27269@ke4zv.atl.ga.us>, <19940112231936OSYSMAS@MVS.OAC.UCLA.EDU>, <1994Jan14.005918.1@auvax1.adelphi.edu>om
- Subject : Re: why 29.94 fps?
-
- schmidt@auvax1.adelphi.edu wrote:
-
- <lines deleted>
-
- : My PAYING daytime job is as a design engineer for ABC New York. WABC TV is
- : adjacent to the network facilities, and I believe they get their sync reference
- : from the network. They did the last time I looked, which was some years ago.
- : I'll post here if this is untrue. ABC Network uses a Rubidium standard for
- : sync, BUT, the backup, if the Rubidium croaks, is the crystal oscillator in the
- : GVG sync generator which is normally locked to the Rubidium. Unfortunately,
- : the casual viewer has no way of knowing if the Rubidium reference is up.
-
- : Most every little two-bit local station now has frame synchronizers these days,
- : I think the least expensive ones are only a few thousand dollars now. If so,
- : their colorburst frequency is set by their local reference, and not the
- : network. Also some cable systems use processing which destroys the burst
- : integrity. therefore, don't count on this way of calibrating your frequency
- : counter....
-
- That brings up another interesting question:
-
- Are these frame sychronizers located in the signal path such that
- they are always inline? Assuming the answer is yes, this means that
- *everything* passes through them. What type of video codecs do these
- devices employ? Are their effects visible enough so that we vidiots
- with our 32" monitors would be able to see their nasty artifact trails?
-
- In other words, what sort of digitization of video is going on in these
- frame synch boxes? As good as D2? Almost D1?
-
- ------------------------------
-
- Date: Fri, 14 Jan 94 20:14:17 GMT
- From: ucsnews!sol.ctr.columbia.edu!howland.reston.ans.net!usenet.ins.cwru.edu!eff!news.kei.com!yeshua.marcam.com!zip.eecs.umich.edu!destroyer!nntp.cs.ubc.ca!alberta!adec23!mark@network.ucsd.
- To: info-hams@ucsd.edu
-
- References <CJFF8p.56v@spk.hp.com>, <2gs839$9k4@vixen.cso.uiuc.edu>, <CJGrrI.D7A@acsu.buffalo.edu>e
- Subject : Re: BRAIN CANCER, LEUKEMIA FROM HAM RADIO ;-/
-
- oopdavid@ubvms.cc.buffalo.edu (D.RODMAN) writes:
-
- >irvine@uxh.cso.uiuc.edu (Brent Irvine) writes...
- >>It would depend on how your house is shielded. If you were to put a
- >>layr of chicken wire between your antenna and next floor down, ground
- >>it, your house should be safe.
- >>
- >I do not know where you are getting this type of thinking, but
- >inspite of shielding, once you are in the near field of an antenna
- >there is not much you can do about exposure. I tell you what,
- >why don't you wrap your house with chicken wire and when you
- >are ready, I'll come out and measure the RF???
-
- :-)
-
- Please notice that all stucko houses are covered in chicken wire ...
-
- *when* I had RF in the shack, it could be traced directly to radiation from
- the ground wire (inside my chicken wire encased house). I have an RF clean
- room in my house, a closet completely covered with chicken wire, and because
- it is in the basement, the ground rod is immediately drilled into the cement,
- it effectively shields RF from getting in and out! I will be building the bomb
- shelter out back next ... I wonder if this is the first sign of the disease of
- Ham Radio ...
-
- Ciao, 73 de VE6MGS/Mark -sk-
- "He's everywhere, He's everywhere ... Chicken Maaaaaaaaaannnnnnnn"
-
- ------------------------------
-
- End of Info-Hams Digest V94 #42
- ******************************
-