Date: Sat, 2 Apr 94 00:07:32 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 #365
To: Info-Hams
Info-Hams Digest Sat, 2 Apr 94 Volume 94 : Issue 365
Today's Topics:
Amateur Radio: Elmers List Info and Administrivia
Amateur Radio: Elmers List Quick-Search Index
NEED EXTRA CASH? READ THIS!
Source for RF Power MOSFETS (IRF511)
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: Fri, 1 Apr 1994 12:00:13 GMT
From: ihnp4.ucsd.edu!usc!sol.ctr.columbia.edu!news.kei.com!news.byu.edu!news.mtholyoke.edu!news.unomaha.edu!news@network.ucsd.edu
Subject: Amateur Radio: Elmers List Info and Administrivia
To: info-hams@ucsd.edu
Posted-By: auto-faq 3.2.1.2
Archive-name: radio/ham-radio/elmers/admin
Revision: 1.6 12/26/93 15:45:09
Changes: Added new index file, Gopher, WWW, and WAIS entries
This administrivia file and the companion Amateur Radio Elmers Resource
Directory are intended for non-commercial distribution via Usenet. Any
other uses, please E-mail for permission.
A Brief Historical Overview:
++++++++++++++++++++++++++++
If there is any one constant in the changing state of the communications
art, it is that "Hams" (Amateur Radio Operators) have always been on
the forefront of it. Rumors abound where the term "Ham" came from.
Some of the more amusing are described at the end of this article.
Regardless of origin of the name, a "Ham" is universally recognizable as
one who experiments in radio and communications.
Whether it be constructing a low-power CW radio with vacuum tubes, or
designing TCP/IP packet networks, such experimentation has historically
spilled over into the mainstream such as was the case with Edwin
Armstrong, who developed the regenerative oscillator and FM radio, or
General Curtis LeMay (W6EZV) who was instrumental in making Single-
Sideband the communications standard for the Strategic Air Command
(1947-1992, now reorganized into a joint command called USSTRATCOM) and
eventually the U.S. Air Force. Although packet-switching techniques
originated from DARPA (Defense Advanced Research Projects Agency) and
the ARPANet, no one can deny the tremendous influence that amateurs
have had in demonstrating the viability of TCP/IP and AX.25
communications via radio links. The efforts of AMSAT (the Amateur
Satellite Corporation), including the development of many ham satellites
and the low-orbiting Microsats (communications satellites no bigger than
a breadbox that use store-and forward packet techniques), have certainly
advanced the state-of-the-art in communications, one of the defined
purposes of the Amateur Radio Service, as recognized by international
treaty.
Since in many cases hams are writing "the book", there is often no
"book" or other established reference for a beginner to refer to.
Traditionally, information has been passed on from ham to ham via word-
of-mouth. Like many of the traditional crafts, a variation of the
Master-Apprentice system has emerged, the Elmer-Novice relationship.
Called "Elmers" because they are usually older and wiser, having the
benefit of many years in the hobby, including several failed projects,
and an electric shock or two, they have traditionally been the mainstay
of amateur radio, and the source of many new hams, particularly those
interested in working on emerging technologies.
Even more importantly, Elmers provided an outlet for the impatient
newcomer who wanted "to know everything, and right away." Faced with
such a request, a good Elmer will smile and proceed to lead the novice
through some project or operating experience. Several hours, days, or
weeks later, the novice would have his answers, but would have earned
them. Even better, the sense of accomplishment would boost the novice's
confidence and nudge him or her down the road to being a model,
experienced ham operator.
Many present hams feel that such an experience is missing today. In
today's hustle-bustle world, the response to such natural curiosity and
desire to learn is, more often than not, "I'm too busy" or "RTFM." As a
result, the quality of new hams declines and the knowledge and operating
habits they develop in their first formative months and years leave much
to be desired. And the very same hams who claim that they "can't
understand the new generation" also, in almost the same breath, lament
about the "decline of amateur radio."
What is an Elmer today?
+++++++++++++++++++++++
An Elmer today is of any age, male or female, who has some expertise and
is willing to share it with beginners. Elmers don't even need to be
licensed amateurs, just people with knowledge in some area of
electronics or communications technology.
What is a Usenet Elmer?
+++++++++++++++++++++++
With the ever-widening scope of the Internet, and the amateur radio
newsgroups on Usenet, the potential for Elmers to share their
knowledge to a wide audience has never been greater. To that end, I
have started to maintain a list of such Elmers. Volunteers need only
send me their name, E-mail address, and area of expertise. I have set
up an administrivia mailbox for this purpose (elmers-request@
unomaha.edu, the default Reply-To: of this message).
Those desiring a more extensive list, or who need more specific
assistance, are encouraged to contact Rosalie White, WA1STO, Educational
Services Manager at the American Radio Relay League, 225 Main St.,
Newington, CT 06111 or via electronic mail addressed to
rwhite@arrl.org.
How may I obtain the latest copy of the Elmers List?
++++++++++++++++++++++++++++++++++++++++++++++++++++
There are currently 7 ways of obtaining the Elmers List. Any site
at least reachable by Internet E-mail can use options 3 or 4:
1. Usenet News: The latest copy of the list can be found in the
companion posting to this message, "Amateur Radio: Elmers Resource
Directory." Since the list is cross-posted to rec.radio.amateur.misc,
rec.radio.info, rec.answers, and news.answers on the 1st of each month,
with an expiration date 6 weeks into the future, there should always be
a copy available at most news sites. Check your newsreader
documentation for information about reading previously-read articles.
2. Anonymous FTP: If your site is directly connected to the Internet,
you may retrieve the latest copy via File Transfer Protocol (FTP) from
the following sites:
ftp.cs.buffalo.edu /pub/ham-radio/elmers*
rtfm.mit.edu /pub/usenet/news.answers/radio/ham-radio/elmers/*
3. Mailing-List: Since the list is cross-posted to rec.radio.info, the
latest copy may be obtained from the mailing-list gateway for that
newsgroup (along with many other informational articles about radio)
when it is published each month. To subscribe, send E-mail to:
listserv@ucsd.edu
and in the BODY (not the Subject) of the message, write:
subscribe radio-info
The server may not be able to determine your return address. In that
case write:
subscribe radio-info (your E-mail address)
You should get an acknowledgement very shortly.
4. Mail-Server: If you don't want to read through the entire gateway
of rec.radio.info, or want a copy of the list right away, send E-mail
to:
mail-server@rtfm.mit.edu
and in the BODY (not the Subject) of the message, write:
send usenet/news.answers/radio/ham-radio/elmers/admin
send usenet/news.answers/radio/ham-radio/elmers/index
send usenet/news.answers/radio/ham-radio/elmers/list
send usenet/news.answers/radio/ham-radio/elmers/diff
and the latest copy of the list should be sent to you E-mail within 24
hours (the mail-server uses batch priority to reduce system demand).
The last three services are experimental. I'm not terribly familiar
with them, and cannot offer much technical support regarding their use.
(I'd appreciate feedback on whether or not you find them useful,
though.)
5. Internet Gopher: The latest copy of the list should be available
from the following Gopher sites, all at standard port 70:
cc1.kuleuven.ac.be
jupiter.sun.csd.unb.ca
gopher.univ-lyon1.fr
ftp.win.tue.nl
gopher.win.tue.nl
see also comp.infosystems.gopher
6. World-Wide Web (WWW): The latest copy of the list should be available
from the following WWW site:
URL: http://www.cis.ohio-state.edu:80/hypertext/faq/usenet
under pages:
radio/ham-radio/elmers/admin
radio/ham-radio/elmers/index
radio/ham-radio/elmers/list
radio/ham-radio/elmers/diff
see also comp.infosystems.www
7. Wide-Area Information Service (WAIS): The latest copy of the list
should be available from the WAIS server at rtfm.mit.edu (standard port
210) in database "usenet."
see also comp.infosystems.wais
How may I contribute to the Elmers List?
++++++++++++++++++++++++++++++++++++++++
By using this resource, you are benefitting the net by obtaining
assistance in the fastest and most efficient way possible. By
volunteering to appear on this list, you are contributing to the good
reputation of the radio-related newsgroups.
Thanks to all the volunteer Elmers, as well as courteous list users, for
making this service a success.
--
73, Paul W. Schleck, KD3FU
pschleck@unomaha.edu (personal mail)
elmers-request@unomaha.edu (Elmers List administrivia)
* Possible origins of the word HAM:
The acronym "Home Amateur Mechanic" or...
from the Cockney pronunciation of "L'amateur" or...
the initials of the founder of the American Radio Relay League, Hiram
Maxim, W1AW (his actual middle name being Percy apparently
notwithstanding) or...
from the call letters of one of the first amateur stations at Harvard,
H.A.M. (please, no flames from W1XM at MIT)
Dale Mosby, N7PEX, offers the explanation that HAM must stand for "Hardly
Any Money," considering the investment one could make in the hobby.
Knowledgeable individuals from the American Radio Relay League (ARRL),
and other radio historians, seem to agree that the terms "Ham" and "Lid"
(an inept operator) both originated with landline telegraphy. A "Ham"
was a show-off and a "Lid" was a telegraph operator so inexperienced, he
had to use a pot or can lid to rest his telegraph sounder on to properly
copy the code.
As an interesting historical footnote, early telegraph operators may
have been the first to experience the infamous curse of our
communications age, Repetitive Stress (or "Carpal Tunnel") Syndrome
(called "Glass Arm" in those days, which encouraged the invention of the
semi-automatic or "bug" key).
(Larry E. McDonald, N6ZMB, wrote to point out another plausible origin,
which doesn't necessarily contradict the ARRL version. The term "ham"
may have been derived from "ham-fisted" or "ham-handed" to describe poor
telegraph operators who were hired from the ranks of radio operators.
Or maybe "ham-fisted" and "ham-handed" are derived from "ham." Who
knows?)
------------------------------
Date: Fri, 1 Apr 1994 12:23:08 GMT
From: ihnp4.ucsd.edu!swrinde!emory!europa.eng.gtefsd.com!MathWorks.Com!news.kei.com!news.byu.edu!news.mtholyoke.edu!news.unomaha.edu!news@network.ucsd.edu
Subject: Amateur Radio: Elmers List Quick-Search Index
To: info-hams@ucsd.edu
Posted-By: auto-faq 3.2.1.2
Archive-name: radio/ham-radio/elmers/index
Quick Search Index by Subject:
(Note: This index is not necessarily all-inclusive and some Elmers are
listed more than once.)
AMATEUR RADIO EMERGENCY SERVICE MAILING LISTS
(ARES)/RADIO AMATEUR CIVIL
EMERGENCY SERVICE (RACES) Botterell (Networks in Emergency
Mangement)
Botterell (Networks in Emergency Engehausen, et al (AA4RE Packet
Management Mailing List) BBS)
Chilton (EMA Radio Officer) Dodell (Land-Mobile Radio,
Engehausen (RACES Bulletins) MARS Members)
Fyodorov (Russia) Ehrlich (Many, see full entry)
Humphries (ex-Asst. EC) Freeman, M (ACC Equipment)
Hurder (ARRL Field Services) Hurder (ARRL Field Organization)
Magid Kluft (rec.radio.amateur
Stader (EMAS SEC) Working Group)
Wilson Knapp, et al (Iowa State Elmers)
Prescott (Antique and Older
AMATEUR TELEPRINTER OVER RADIO Tube Equipment)
(AMTOR)/PACKET TELEPRINTER OVER Meredith (PBBS Bulletin Forwarding,
RADIO (PACTOR)/RADIO TELETYPE (RTTY) F6FBB Packet BBS)
Nerenberg (DX)
Battles Schleck, et al (College Clubs)
Doane Walker, et al (QRP)
Feeney (PACTOR)
Freeman, J (AMTOR and PACTOR) MEDIUM FREQUENCY (MF, 160 meters)
Graham, P
Richards Freeman
Sayer (also decoding CHU's Harris
ASCII time code) Zurn
AMERICA ON-LINE MILITARY AFFILIATE RADIO SYSTEM
(MARS)
Stader (Host,
Ham Radio Club forum) Doane (Navy)
Dodell (Air Force, Mailing List)
AMERICAN RADIO RELAY LEAGUE Miller (Air Force)
(ARRL) Monson (Army)
Sargent (Army)
Battles (QST Features Editor) Schildt (Army MARS HQ Internet/
Bloom (ARRL HQ Postmaster, Milnet Contact and Registration
QEX Editor) Service)
Doane (CT SM) Taylor (Air Force)
Elmore (CO TC) Welch, J (Navy/Marine Corps)
Hare (Laboratory Manager) Welch, V (Navy/Marine Corps,
Hurder (Field Services Deputy list of MARS members on the
Manager) Internet, tentative BBS
Jahnke (VEC Manager) conference)
Lau (Technical Editor)
Redding (Educational Advisor) MICROWAVE
Stader (EMAS SEC)
Turner (Volunteer Counsel) Graham, P (1.2 Ghz repeaters)
Wilson (SCV SM) Hammill
Jahnke (SSB/CW SHF Contesting)
ANTENNAS Lau (Transverters up to
24 Ghz)
Brewer (wire HF) Sargent (3, 5, and 10 Ghz)
Billson (HF)
Brubaker (HF) MOBILE
DePolo (including VHF/UHF)
Elmore Carruth (FM and HT's)
Freeman, J (wire HF and 160m) Hare (RFI issues)
Graham, J (wire HF for Humphries
apartments) Keller (HF)
Halbert (simple designs) Salmon (Maritime)
Harris Sargent
Humphries (VHF and multi-band Salyzyn (HF CW)
wire arrays)
Myers (and transmission NATIONAL TRAFFIC SYSTEM (NTS)
lines)
Ornitz (including computer Doane
modelling) Elmore
Potter Hurder (ARRL Field Services)
Rymell Salyzyn (Canada)
Salnick Sargent
Salyzyn Zurn (Europe)
Silva
Standerfer NOVICE/TECH INSTRUCTION
Stine (wire HF)
Stockton Billson
Taylor Bono (AutoExam/AutoCW)
Zurn (wire HF) Carlson (Macintosh Hamstacks)
Chilton
ANTIQUE AND OLDER EQUIPMENT Knapp, et al
Larson
Brewer (40's-70's) Magid
Keys (including HF and CW) Maia
Prescott (Mailing List) Myers (including basic
Moore, T (VHF) electronics and communications
Standerfer theory)
Turner (including Kenwood and Redding
Ten-Tec) Reeves
Salmon
APPLE MACINTOSH COMPUTER Stader
Braun PACKET
Carlson (Macintosh Hamstacks)
Ehrlich (FTP archive) Angus (TCP/IP, NOS, UUPC,
Stader (List of Macintosh Tnet, and SNEWS, IP
Amateur Radio Software) Coordinator for CA - LA
Van Peursem (Savant) and SF Valley subnet)
Battles (AX.25 and TCP/IP)
BATTERIES Bloom (IP Coordinator for
Connecticut subnet)
Hammill (Sealed Lead-Acid) Braun (TCP/IP, Macintosh, IP
Meyers Coordinator for WNY subnet)
Stuart (including Ni-Cads) Cole (TCP/IP and NOS)
Dodell (IP Coordinator for
CALLSIGN PROJECT/NATIONAL TECHNICAL Arizona subnet)
INFORMATION SERVICE (NTIS) Elmore (including TCP/IP)
Engehausen, et al (AA4RE Packet
Carruth BBS and Mailing List)
Lloyd (including QRZ Ham-Radio Freeman, J (KAM, TCP/IP, NOS for
CD-ROM) DOS and OS/2)
Fyodorov (AX.25 and TCP/IP in
CIVIL AIR PATROL (CAP) Russia)
Graham, J (KAMterm)
Carlson Graham, P (VHF)
Moore, J Knapp, et al
Meredith (AZ Packet Coordinator,
COLLEGE CLUBS PBBS Bulletin Forwarding Mailing
List, F6FBB Packet BBS Mailing
Edwards List)
Knapp, et al Salyzyn (Canadian)
Schallehn Sargent
Schleck (et al, Mailing List) Sayer (VHF)
Schallehn (Kantronics)
COMMERCIAL EQUIPMENT Stader (TCP/IP and Macintosh)
Vail (TCP/IP, TAPR/9600, IP
Dodell (Mailing List) Coordinator for East/Central
Richards Massachusetts subnet)
Van Peursem (Savant and
CW (MORSE CODE) Macintosh)
Bono (AutoCW) MEDIA (PUBLICATION/WRITING/
Elmore BROADCATING)
Fyodorov (including Cyrillic)
Keys Battles (QST)
Rosenfeld Bloom (QEX)
Salyzyn Coletti, et al (Newsline)
Silva Lau (QST/QEX)
Squicciarini Moore (Co-Host, Ham Radio and More)
Stine
Stockton PART-15 BROADCASTING
Tescher (Computer Programs)
Zurn (including European Ornitz
abbreviations)
POWER SUPPLIES
DIGITAL SIGNAL PROCESSING (DSP)
Myers
Bloom Stuart
Edwards
PRODUCT INFO/FEEDBACK
EQUIPMENT TESTING/TROUBLESHOOTING
Appell (Alinco and Yaesu)
Billson Freeman, M and Shirley (Advanced
Brewer (Tube Gear) Computer Controls - ACC)
Freeman, J (PC ISA Bus)
Hare (ARRL Laboratory Manager) QRP (LOW POWER)
Myers
Ornitz (Instrumentation) Billson
Rymell (Electronics and Computer Halbert (HF)
Service Work) Harris
Salnick Sargent (VHF)
Salyzyn Stockton
Standerfer Turner (including Ten-Tec
Stockton Argonaut)
Taylor Walker, et al (Mailing List)
Tescher Zurn
Witte (Instrumentation)
RADIO FREQUENCY INTERFERENCE (RFI)
FREQUENTLY ASKED QUESTIONS (FAQ's)
Elmore
Bloom (ARRL E-mail and Info Server) Graham, P (including PC's)
Bowen (Supplemental FTP Archives, Hare (including Automotive and
Internet Callbook Server) Telephone)
Cheeseman (Australia) Myers
Holmstead (Satellites/Space) Stockton
Jahnke (VE Exams Scheduled) Witte
Kluft (General)
Salyzyn (Radio Amateurs on Usenet, RECIPROCAL LICENSING/FOREIGN OPERATION
rec.radio.info Moderator)
Stader (Macintosh Amateur Radio Andrews (New Zealand)
Software) Flaherty (South Pacific)
Turvey (United Kingdom) Fyodorov (Russia)
Watt (Packet and Digital Modes) Levine (Australia and Japan)
Woods (Mail Order Electronics) Salmon
Salyzyn (Canada)
HANDICAPPED OPERATING Stockton (UK)
Zurn (Italy and Germany)
Billson
Doane REPEATERS
Hurder
Knapp, et al Battles
Chilton
HIGH FREQUENCY (HF)/ De Armond
CONTESTING/DX DePolo (VHF/UHF)
Graham, P (including 1.2 Ghz)
Battles Keller (220 Mhz)
Brubaker Knapp, et al
Chilton Schallehn (VHF/UHF)
Elmore Witte
Fyodorov
Knapp, et al SATELLITES
Nerenberg (DX Mailing List)
Rosenfeld (including practical Bass (including low-cost, QRP
QSLing tips) Microsat stations)
Salmon (including DXpeditions) Feeney
Salnick Flaherty (including OSCAR)
Silva
Squicciarini SEMINARS/LECTURES
Tidd (DXCC Databases)
Zurn Humphries
Redding
HOMEBREWING/DO-IT-YOURSELF Stuart (Batteries and Power
Supplies)
Billson (6809 uP)
Bloom (including DSP) TANDY COLOR COMPUTER AND OS-9
Carruth (Digital Design,
Software) Billson
Chilton
De Armond TELEVISION, FAST-SCAN (ATV)
DePolo (including VHF/UHF
design and construction) Chilton
Edwards (including DSP) Feeney
Fyodorov (including computers) Hammill
Halbert (QRP)
Harris TELEVISION, SLOW-SCAN (SSTV)
Keys (Junk Box projects)
Kohnen (Tubes) Langner
Lau (Transverters, VHF/UHF,
Filters, repeatable projects) UNIX
Myers (Transmission Lines,
Analog and Digital Design) Carruth (System Administration)
Moore, T (Junk Box projects) Cole (including Linux)
Rymell (Electronics and Computers, Ehrlich
Low-Cost projects) Freeman, J
Salyzyn Moore, C (including X-Windows)
Sayer (Class-C Biopolar Amplifiers Sayer (especially SunOS)
and Phased-Lock-Loop Circuits) Tescher
Silva (Analog, Digital, Tubes, Van Peursem (HP-UX and System
Semiconductors, RF, Finding Administration)
Parts)
Stine (Tube Amplifiers, VERY HIGH FREQUENCY (VHF)/
Receivers, and Exciters) ULTRA HIGH FREQUENCY (UHF)
Stockton (including QRP)
Stuart (Batteries and Power Battles
Supplies) Carpenter (6 meters)
Taylor (Tubes and Amplifiers) DePolo (Weak Signal, Contesting,
Tescher and Repeaters)
Flaherty (including Amplifiers)
IBM PERSONAL COMPUTER (PC) AND Graham, P (Commercial Rig
CLONES Conversions)
Hammill (including ATV and DX)
Angus Humphries (2m FM)
Bono (AutoExam, et al) Jahnke (CW/SSB Contesting and
Braun Weak Signal)
Cole Lau (CW/SSB to 222 Mhz)
Ehrlich Moore, T
Freeman, J (including OS/2 and Richards (Monitoring)
ISA bus) Sargent (2 and 6 meter AM and
Fyodorov Contesting)
Keller Silva
Tescher Witte (including Portable
and Mountaintopping)
INTERNET SERVICES
VOLUNTEER EXAMINER (VE) PROGRAM
Schleck
Billson
MAIL-SERVERS/ARCHIVES Carlson (W5YI)
DePolo
Bloom (ARRL Info Server) Jahnke (ARRL VEC Manager)
Deignan (Buckmaster CD-ROM) Kohnen (W5YI)
Ehrlich (Boston ARC FTP archive) Maia (W5YI VEC)
Harding (Ham Server) Reeves
Shirley (ACC Equipment) Salmon (Sunnyvale)
Sternitzke (W5YI Asst. VEC)
--
73, Paul W. Schleck, KD3FU
pschleck@unomaha.edu (personal mail)
elmers-request@unomaha.edu (Elmers List administrivia)
------------------------------
Date: 2 Apr 94 06:17:08 GMT
From: dog.ee.lbl.gov!agate!howland.reston.ans.net!noc.near.net!news.delphi.com!gilbaronw0mn@ucbvax.berkeley.edu
Subject: NEED EXTRA CASH? READ THIS!
To: info-hams@ucsd.edu
>If you're like most people I know, you could use some extra cash. I am
>providing to you the unique opportunity to do so at little cost and effort.
By
>working 1-2 hours per week you can earn an unlimited income. E-mail me now
for
>more detailed information on this once-in-a-lifetime opportunity. You get
out
>of life, what you put into it!
>
Do not respond to this garbage. It is almost certainly a scam.
Gil Baron, El Baron Rojo, W0MN Rochester,MN
"Bailar es Vivir"
PGP2.3 key at key servers or upon request
------------------------------
Date: Fri, 1 Apr 1994 13:38:34 GMT
From: ihnp4.ucsd.edu!swrinde!cs.utexas.edu!uwm.edu!fnnews.fnal.gov!att-in!nntpa!not-for-mail@network.ucsd.edu
Subject: Source for RF Power MOSFETS (IRF511)
To: info-hams@ucsd.edu
In article <1994Apr1.091939.1@ntuvax.ntu.ac.sg>,
<asirene@ntuvax.ntu.ac.sg> wrote:
>Hi,
>
> Can anyone tell me a source for IRF511/510 MOSFETs? Also are there other types of MOSFETs suitable saw a power of 40 or 50
>watts range? Where can I get them? Tks.
>
>73,
>Daniel
Hell, I think Radio Shack carries the IRF511. Probably expensive though.
Try Digi-Key.
--
Wally Blackburn Clinton-Gore - Socialist Leadership
wrb@ccsitn.cb.att.com for the 90s!
Amateur Radio Station AA8DX I'm the NRA.
*More people have died in Ted Kennedy's car than from my gun!*
------------------------------
Date: 1 Apr 1994 12:46:17 GMT
From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!darwin.sura.net!news.larc.nasa.gov!grissom.larc.nasa.gov!kludge@network.ucsd.edu
To: info-hams@ucsd.edu
References <1994Mar30.150833.7038@arrl.org>, <1994Mar31.004345.251@ke4zv.atl.ga.us>, <1994Mar31.143525.7073@arrl.org>larc.n
Subject : Re: RF and AF speech processors. Was: FT-990 vs TS-850
In article <1994Mar31.143525.7073@arrl.org> zlau@arrl.org (Zack Lau (KH6CP)) writes:
>The point is, does the audio phase shift networks used in the 2010
>cause a noticeable degradation in audio quality as perceived by
>the users of the radio? And, since we are primarily talking
>about SSB, as opposed to AM, there is *no* benefit to having
>a detector that can correlate the upper and lower sidebands--we
>only have one sideband to work with on receive.
Yes, indeed, it does cause a noticeable degradation in audio quality.
In the case of units like the 2010 which are primarily going to be used
to listen to commercial broadcasters, there is a good bit of benefit in
having a detector that can correlate both sidebands, though admittedly
for ham work, it's much less of a requirement.
But it basically comes down to how much audio degradation you mind. If
I am listening to a commercial shortwave broadcaster, I expect much higher
fidelity than I do from amateur SSB transmission. With SSB, I just want
to be able to make out the words. (On the other hand, I expect a lot
more from wideband FM broadcast, although I don't always get it...)
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."
------------------------------
End of Info-Hams Digest V94 #365
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