Ham Radio/Ham Radio CD-ROM (Emerald Software) (1995).ISO/news/inham07/933

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Subject: INFO-HAMS Digest V89 #933
To: [e-mail]

INFO-HAMS Digest            Sun, 26 Nov 89       Volume 89 : Issue 933

Today's Topics:
                           airport security
                              amsat bbs
                          Antique Newsgroup?
                               Contests
       Every one uses them -how do they work?Matching networks-
                             scanner laws
                    The End of Amateur Radio {3/3}
                 The End of Amateur Radio {Part 1/3}
                             transverters
----------------------------------------------------------------------

Date: 26 Nov 89 15:56:00 GMT
From: ndcheg!ndmath!nstar!usenet!nstar![e-mail]  (Larry Snyder)
Subject: airport security

I have carried a handheld aircraft radio (both transmit/receive) on board
US Air flights without problems.

------------------------------

Date: 26 Nov 89 20:24:54 GMT
From: microsoft![e-mail]  (Joe Holman)
Subject: amsat bbs

anybody have the current AMSAT BBS phonne number ?

please send if you do...

73 Joe

microsoft!joehol
uw-beaver![e-mail]

------------------------------

Date: 25 Nov 89 17:17:48 GMT
From: cs.utexas.edu!natinst!sequoia!texbell!swbatl![e-mail]  (4237)
Subject: Antique Newsgroup?

Is there, a newsgroup appropriate for the discussion of antiques and
collectables? If so would somone please direct me to it.  If not, are
there others interested in starting a mailing list?

My interests include antique radios, books, and books about radio as
well as furniture restoration, auctions and collecting trivia.
There seems to be a few people in rec.arts.books interested in book
collecting, a few in rec.woodworking interested in antique restoration,
and a few in sci.electronics interested in antique radio and radio history
but no forum dedicated to the (admittedly limited) audience for these
topics.   Perhaps they could coexist in a mailing list.  I will volunteer
to run said list, at least at the beginning.

Any interest?
Send mail to uunet!swbatl!adams or [e-mail]
please have the word antique in the subject line.   The perl
mailing list is swamping my in box :).
--
#    ---Tom Adams---    | uunet!swbatl!adams or [e-mail]
# I collect pre-1930 wireless, electrical and scientific books.
# opinions... Opinions? I don't think I'm allowed to have opinions.
--
#    ---Tom Adams---    | uunet!swbatl!adams or [e-mail]
# I collect pre-1930 wireless, electrical and scientific books.
# opinions... Opinions? I don't think I'm allowed to have opinions.

------------------------------

Date: Sun, 26 Nov 89 15:32 CST
From: "James P. Ley" <[e-mail]>
Subject: Contests

On occasion I hear "CQ Contest" on the air.  I do not participate in contests
myself and wonder whether I should answer the call and give the caller a
contact or whether I would be a hinderance since I don't know all the numbers
and things that the contesters use and would thus slow him or here down.

Any advice from contesters?

                Jim, NX9F

------------------------------

Date: 26 Nov 89 20:04:10 GMT
From: fe2o3![e-mail]  (Michael Katzmann)
Subject: Every one uses them -how do they work?Matching networks-

In article <[e-mail]> [e-mail] (Ed Gilbert tel [phone]) writes:
   >> Can any one suggest the network best suited for antenna-matching and perhaps
   >> briefly explain why and how these networks can transform impedances and perhaps
   >> how one might go about home-brewing his own??
   >
   >The most practical matching network for matching a wide range of unbalanced
   >loads to 50 ohms is the tee network.  Schematically it looks like
   >
   >                   ----- X1 ------------ X2 --------
   >                                 |
   >              Zg                 X3                 Zl
   >                                 |
   >                   ---------------------------------
   >
   >This works best when X1 and X2 are the same type of reactance, and opposite
   >of X3.  Usually X1 and X2 are capacitors, X3 an inductor, which makes
   >the overall circuit have a high-pass filter frequency response.  If
   >X1 and X2 are selected to have capacitive reactance of ~100 ohms
   >at maximum C, and X3 ~100 ohms at maximum L, you'll be able to match
   >loads anywhere from 1 ohm to over 1000 ohms at some combinations of
   >the 3 reactances.  Somewhere I have a C program which cranks out tables
   >of Zl for 50 ohm Zg while sweeping X1, X2, and X3 over their ranges.
   >I can dig this up and email to you if you're interested.

A very good technical note appears in the Motorola RF Databook (Vol 2) AN721.
To explain how you get a change in impeadence, first put a reactance, say
a capacitor C in series with your load R. Then do the mathematics to change
the (R-jXc) to (G+jYc). i.e. a series to parrallel conversion. looking
at it as a two-port black box they are both the same. When you do this
transformation you will see that the G value (conductance) is not the same
as simply 1/R !!! Thus if we resonate out the capacitive reactance that we
have added (Y) with a -Y inductor, our original R is transformed to 1/G.
This is one of the simplest L-matching networks. Other types, Pi etc help
with broadbanding and cam be made to work over a larger range.

---------------------------------------------------------------------
email to
UUCP:       uunet!mimsy!{arinc,fe203}!vk2bea!michael
                          _ _ _                    _
     Amateur    |    VK2BEA    (Australia)      ' ) ) )      /           //
     Radio    |    G4NYV    (United Kingdom)  / / / o _. /_  __.  _  //
    Stations|    NV3Z    (United States)     / ' (_<_(__/ /_(_/|_</_</_

Michael Katzmann
Broadcast Sports Technology.
2135 Espey Ct. #4
Crofton Md. 21114 USA

Ph: [phone]

------------------------------

Date: 26 Nov 89 19:13:24 GMT
From: elbereth.rutgers.edu!hardees.rutgers.edu![e-mail]  (Jeff Schwartz)
Subject: scanner laws

I am more than a little confused with all the talk over so called
scanner laws.  I once saw a copy of a senate bill from the state of
NJ. stating that the only people in the state permitted to have a
scanner in their cars was rescue workers and hams with a Tech license
or higher.  Now I hear that isn't the case.
I am planning a long road trip from N.J. to Florida in about a month.
I would like to bring my H.T. along (receives police and fire as well)
and I am wondering what various state laws are as of now on this
matter.
The states I am in need of info for are

New Jersey
Delaware
Maryland
Virginia
North Carolina
South Carolina
Georgia
and Florida.

Any info would be most helpfull


                        Thanks in advance,
--



                                                  -Jeff
      [e-mail]           Amateur Call: KA2QOU

      Jeff Schwartz
      RPO 6129 Box 5063
      New Brunswick, New Jersey 08903
      [phone]

------------------------------

Date: 26 Nov 89 22:00:39 GMT
From: shelby!neon!bodega.stanford.edu![e-mail]  (Paul Flaherty)
Subject: The End of Amateur Radio {3/3}

In retrospect, a number of factors doomed a hobby once enjoyed by millions.
Probably the largest and most important of these was a lack of tangible
justification of the hobby.  The recent rebirth of hobbyism within American
society has brought to light many intangible factors which could have formed
a more stable footing for amateur radio, had we known and appreciated them
at the time.

The foremost of these is the use of technology as recreation, and that
intellectual forms of play are at least as important as physical recreation
to well being.  Despite the canned nature of ham radio equipment in the
early 1990s, there was still a significant intellectual challenge to setting
up a station, operating, and solving the myriad of little problems that would
spring up from time to time.  The practice of diagnosing a complex system is
inherently necessary for the development of nested thinking, recognized by
most psychologists as an important vehicle for intellectual development.

Moreover, ham radio provided a social outlet for thousands of technically
oriented persons, whom society had shunned as "geeks" and "wierdos".
A technophilic teenager could find a mentor in the ranks of the hackers and
tinkerers on the air.  Ham radio was used extensively by the first generation
of home computer enthusiasts, who were geographically isolated, but bound by
the common desire to exploit and develop a new technology.

Perhaps the period author Steven Levy best described the intellectual joy of
hacking around with technology; of being part of a society where "one's
social status was only related to the ability to hack".  It was clear that
such intangibles were known to organizations and authors at the time; they
simply did not recognize them for the basic human needs that they were.

These  factors, together, are part of a greater whole and form a
political right known as intellectual freedom.  The right to explore the
universe as one sees fit was not a legally recognized freedom until the
California Revolt of 2019.  Originally one of the founding planks of the
People's Republic of Berkeley, and later incorporated into the California
Constitution, Intellectual Freedom, the right to follow one's curiousity,
has resulted in an explosion of experimental activity within the New
Republic.

And, it may be noted, that on a rainy, Pacific Coast's eve, that once again
the airwaves are filled with the clicks, whirrs, beeps, fades, pops, and
distorted, joyous human voices that tickle the axons and neurons of its
basement dwelling hobbyists.  The California Kilowatt Lives!

-=Paul Flaherty, N9FZX      | "I asked for a dissertation topic, and for my
->[e-mail] | sins, they gave me one."

------------------------------

Date: 26 Nov 89 22:20:41 GMT
From: shelby!neon!bodega.stanford.edu![e-mail]  (Paul Flaherty)
Subject: The End of Amateur Radio {Part 1/3}

In article <[e-mail]> [e-mail] (David Hallidy) writes:
>sure any prospective hams or new hams will think twice about what
>they're about to get into.

Frankly, I don't think I'm capable of scaring anyone who has read any of
the ARRL's "advertising" and not been turned off...

>About all we've been seeing on this newsgroup lately are the whinings
>of DeArmond (with his "Ham Radio is useless" tripe) and things like
>the posting to which I am directly responding. Frankly, I'm REAL TIRED
>of it. There is plenty of positive stuff going on, yet, just like on
>TV, it's not sensational so it doesn't get mentioned.

The genesis of this set of articles was a dinner meeting that I had with a
few hams about two weeks ago.  These were not your ordinary "sit on your
hands and bitch" - type hams.  These were people who have contributed to
the hobby, some dramatically so.  Although we met to discuss the development
of packet radio, most of the evening was spent discussing what many thought
was a serious problem.  Personally, what transpired that evening really shook
me up; I'd always dismissed "The End of Amateur Radio" as something that has
been predicted since the days of the spark gap.  Not any more.

>I realize "The End of Amateur Radio" was written to wake people up so
>that something could be done to keep the story from coming true, but
>unless parts 2 & 3 have a positive ending (which I doubt),

Stories of this genre (eg, _Fail Safe_ et al) must go to their logical
conclusion if they are to have any positive emotive effect beyond "gee,
isn't that nice".  Frankly, to quote Stephen King, "I want to scare the
hell out of people".  But the third and final segment is an analysis of what
could have been done, which is why I waited to respond to your article.

> what's more
>likely to happen is that it will have the effect of hastening the
>conclusion by giving those few of us that still look at ham radio as a
>positive experience a feeling of futility.

To the contrary, Dave, let it be known that there are lots of people who
are being frustrated, and that they're not alone.  American society is
crisis driven; when people wake up and see what's happening, only then
will something be done...

-=Paul Flaherty, N9FZX      | "I asked for a dissertation topic, and for my
->[e-mail] | sins, they gave me one."

------------------------------

Date: 26 Nov 89 17:14:38 GMT
From: attctc!mjbtn![e-mail]  (Mark J. Bailey)
Subject: transverters

Hello,

I am interested in getting more information about transverters that work
with an HF rig.  What VHF/UHF bands can be used?  What are some of your
personal experiences and comments on them?  Who makes them and how can I
get in touch with some of these dealers/manufacturers?  What I really want
to do is add 2 meters (some form) with my Icom IC-740.  It is capable of
working with a transverter.  It might also prove convenient to get access
to 50, 220, and 450 MHz, I don't know.  Right now, I know next to nothing
about them and have had a hard time finding information.  Any good articles
in past 73's, CQ's, Ham Radio's, or QST's?

Any and all comment would be *GREATLY* appreciated!

Thanks in advance!

Mark.

--
Mark J. Bailey, N4XHX                             "Ya'll com bak naw, ya hear!"
USMAIL: 511 Memorial Blvd., Murfreesboro, TN 37129 ___________________________
VOICE:  [phone]                            |         JobSoft
UUCP:   ...!{ames,mit-eddie}!attctc!mjbtn!mjb      | Design & Development Co.
DOMAIN: [e-mail]        CIS: 76314,160 |  Murfreesboro, TN  USA

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End of INFO-HAMS Digest V89 Issue #933
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