HDTenEightyP/NetNews huggingface dataset:
From: johnw@bluemoon.rn.com (John L. Wilkerson Jr.)
Subject: Re: Speaking of linears..
Organization: Blue Moon BBS ((614) 868-998[024])
Date: Tue, 11 Aug 92 09:54:36 EDT

sl9b4@cc.usu.edu (Deep Six) writes:

> Hello,
> 
> I've been reading here for a while now, and it seems that the
> discussions about linear amplifiers go in and out of vogue. Sometimes
> the words ``linear'' and ``amplifier'' used in the same sentence is
> ample excuse for a rollicking flamefest. And at other times (like now),
> anyone can log in and reminisce about the times they blew some poor
> trucker out of the water with their nitro-charged linear. What gives?
> 
 
    Well, no..... Discussion looks to me like we are all talking about how 
"linears" suck.   No one cites personal use of one, but rather tells of 
bad experiences on the receiving end of one.   
    
    I am perfectly sure anyone who admits to using one, or promotes their 
use WILL be burned to a cinder here.....
 

|------------------------------------------------------------------------|
| John L. Wilkerson Jr.     | johnw@bluemoon.uucp    | "A realist in a   |
|                           | johnw@bluemoon.rn.com  |  cruel world that |
|Sysop: EastSide Connection | jwilkerson@delphi.com  | wishes to destroy |
| (CoCo) (614) 755-2492     |------------------------|       me"         |
|   SkyNet Node: 1/2                                                     |
|------------------------------------------------------------------------|
From: john.denison@yob.sccsi.com (John Denison) 
Newsgroups: rec.radio.cb
Subject: RE: Q VS 10
Date: 14 Aug 92 17:52:00 GMT
Distribution: world
Organization: Ye Olde Bailey BBS - Houston, TX - 713-520-1569
Reply-To: john.denison@yob.sccsi.com (John Denison) 

-> is available. If not, the CB service is, in and of itself, a good
-> communication tool that should be used and respected.
Around here (SW Houston area) there is a pretty respectable group of CB
users who get on one channel every evening. I'd enjoy CB more if all of
the power hogs would get out. That one of the reasons why I'm looking to
take a HAM operators test for 2-meter.
From: phantom@pro-haven.cts.com (Tiffany Bloxom)
Newsgroups: rec.radio.cb
Subject: Re: Q RULES!!!
Date: 17 Aug 92 20:22:50 GMT
Organization: ProLine [pro-haven] - Pariahs' Haven BBS, 409/693-8262, 9600-300

% 	Well, funny that here, on rec.radio.cb, the discussions look a lot
% like they should belong in rec.radio.ham... Well, about Q/10 codes...
% 

        Oh.....Is there a rec.radio.ham conf.??  We don't get that
here....Oh well...
        Ok....welllllll.....the origin of these numeric communications phrases
is.......[Drum fill...]  Yep!  You guessed it!  ARRL Numbered Radiograms!!!!
Another Amateur Innovation  (Yeah, right...(ha-ha))  
        Anyways, "51" [pronounced "fifty one"...] in ARRL #ed radiogram terms
means....................(I quote from the back of my ARRL Amateur Radio Log
Book....) "Greetings by AMATEUR RADIO.  This message is sent as a free public
service by ham radio operators here at ______________.  Am having a wonderful
time."  
        88 ----another.....(not in the log book, but....) means "hugs and
kisses."
        73 ----probably the Most used numbered comment means, "Best Regards!"
        (btw, it should be pronounced "seventy three"  
        a lot of folks make the mistake of saying "seventy threeS".  This is
grammatically incorrect and Really means (technically...) "Best RegardsES"
(ha-ha) But hey!  We're Amateurs! (ha-ha)
        Some other interesting/useful comments are......

                61 ----- "Wishing you a very merry Christmas and a happy New
                         Year."
                50 ----- "Greetings by Amateur Radio!" (...no epilogue...)
                57 ----- "Wish we could be together."
                46 ----- "Greetings on your birthday and best wishes for many 
                         more to come."

        These are just a few and they all came from the back of my "Official
ARRL Log Book" (Ha-ha...)
        But I'm beginning to babble, so I'll close......

        "Poof!"

        (Phantom ---- kb5owz (Tech+))
% 	51 - Hand Shakes
% 	73 - Friendship
% 	88 - Kisses
% 	144 - To lay down (go to bed) comes from the standard polarizarion
% 		of the 144MHz band.
% 
% 	That was the cultural moment.
% 
% 
% -- 
----
Internet:  phantom@pro-haven.cts.com      Tiffany Bloxom
UUCP:      crash!pro-haven!phantom
From: myers@hpfcso.FC.HP.COM (Bob Myers)
Date: Mon, 17 Aug 1992 16:30:23 GMT
Subject: Re: New Twist on The Directional Antenna Question
Organization: Hewlett-Packard, Fort Collins, CO, USA
Newsgroups: rec.radio.cb

> Not quite true. You forgot about backscatter. It is possible to get the 
> strongest signal from the direction that is 180 degrees away from the station
> you are trying to receive. Rare, true - but it does happen.

Bill, read what I said - I said you wouldn't expect anything from *straight
up*.  I said nothing about receiving signals from 180 degrees away from the
station.

> 
> : distinguish between "sky waves" and "ground waves," at least not in a manner
> : which is repeatable in all situations.
> 
> Except that ground waves tend to be steady in intensity, while sky waves tend
> to vary. Also, I believe that ground waves tend to retain their transmitted
> polarity - sky waves get rotated.
> 

So which of these is useful in designing an antenna that wouldn't receive
"skip?"


Bob Myers  KC0EW   Hewlett-Packard Co.      |Opinions expressed here are not
                   User Interface Tech. Div.|those of my employer or any other
myers@fc.hp.com    Fort Collins, Colorado   |sentient life-form on this planet.
Newsgroups: rec.radio.cb
From: jbs@rti.rti.org
Subject: Re: SOME MORE CB QUESTIONS
Organization: Research Triangle Institute, RTP, NC
Date: Mon, 17 Aug 92 13:31:26 GMT

In article <112.334.uupcb@yob.sccsi.com> john.denison@yob.sccsi.com (John Denison)  writes:
>-> Archery All Band Antenna and cannot get the standing wave out.  There
>-> are no adjustments on the antenna and he has removed all the slack in
>-> the coax in hopes that would do it.  The standing wave is over a 3 on
>-> his meter (sorry I don't know what the 3 is), but my grandfather
>-> tells me it should be below a 2.  Any suggestions?

>Actually the adjustment should be inside the radio, not on the antenna.
>As I have heard, anything over 3 is dangerous to your receiver so I
>wouldn't recommend using the CB until its corrected.

Only radios with built-in antenna matchers could be adjusted to minimize
reflected power at the output transistors, which is what you want to protect.
I'm not aware of any CBs that have ever been manufactured with a built-in
matcher.

Antenna tuning is accomplished by changing the electrical length of the
antenna itself, usually by sliding a rod in or out of a sleeve, by
trimming, or by turning adjusting rings.

The Archer all-band antenna is not intended for CB use. It can be used for
receive only on any band (as can any piece of wire), but can only be used
for transmitting on frequencies at which it's resonant, or with a matcher.
It wouldn't be very effective for CB if you did use a matcher, as antenna
matchers just prevent reflected power from being returned to the
transmitter and don't do anything to improve antenna efficiency.


On a somewhat related note, I have heard that many CBs are designed with a
circuit that decreases output power as SWR increases, with the aim of
protecting the output stage from damage. Anyone know if this is true?

  -joe
Newsgroups: rec.radio.cb
From: cjc@phx.mcd.mot.com (C. Jesse Chai)
Subject: Help! Need to decide the value of SSB CBs.
Summary: As a beginner, I need to know I should get a SSB CB or not. 
Keywords: Help! Mobile SSB CB.
Organization: Motorola Computer Group, Tempe, Az.
Distribution: usa
Date: Thu, 13 Aug 1992 20:44:31 GMT


Hi,

As a beginner for the mobile CB, I am interested to get a SSB unit or just
regular 40-ch.  Because the feature and price are quite different, can anybody
let me know is it worth to get a SSB AM CB for the price? Or a good 40-ch will
be just as good?

Also, if a SSB CB is good to have, which make and model is a good one to get?
Otherwise, which regular 40-ch is a good unit?  I probably will NOT move up to 
other frequency for a while so I like to get a better unit which ever kind I
am going for.

Any suggestion is greatly appreciated. Please email me you comment to
"cjc@phx.mcd.mot.com" if possible.  Thanks.

Jesse 

P.S. Who makes better antenna for CB? Wilson, Firestik, K-40 or other?
Xref: sparky rec.radio.cb:873 misc.misc:3172
From: jfw@ksr.com (John F. Woods)
Newsgroups: rec.radio.cb,misc.misc
Subject: Re: Some More CB Questions
Date: 17 Aug 92 14:34:54 EDT

whos@ddsw1.mcs.com (Ben Feen) writes:
>>My grandfather has a Pres. Zachery Taylor base CB and just put up a
>>Archery All Band Antenna and cannot get the standing wave out.
>if you're talking about the Archer "All-Band", of the type you can get at
>Radio Shack...  All-Band doesn't mean CB, if we're talking about the same 
>antenna here.  A CB antenna is a CB antenna.  An "All-Band" will mean all
>HAM bands, usually about 54 MHZ.  If the antenna looks like a jellyfish,
>with a flat disc of spokes on top of a cone of spikes (called, amazingly
>enough, a discone antenna),  then that's it.

Ah.  That's why I didn't find "All Band" on the CB antenna page when I looked
it up.  :-)  Actually, the thing the catalog labels "All-Band Base Antenna"
looks like a quarter-wave vertical with three vertical elements (presumably
for 144, 220, and 440MHz), which is even worse than the discone antenna (which
they claim "receives 25-1300MHz", but they warn hams to transmit only between
144 and 1296 on it).  A discone antenna is a broadband antenna; it's not really
resonant at one's favorite operating frequency, but it presents a constant
enough impedance that it can be matched easily or operated with an acceptable
mismatch.  If the RS discone were somewhat larger, it would work fine on CB,
but apparently they didn't think to make it that large.  By contrast, the
"all-band" antenna is just three quarter-wave verticals on one mast.
("all-band"?  Hey, what happened to 160M? :-) If Scott has the
three-vertical-element antenna (or the discone, for that matter), he should
definitely return it and get an antenna intended for CB.  Or buy a good
transmatch so he can load up a metal lathe if the mood strikes :-).

John, WB7EEL

[For those who wonder:  a "transmatch" (short for "transmitter match") is
a gadget, usually including one or more inductors and one or more capacitors,
which uses what's mathematically called a "network" to transform one impedance
to another impedance, usually 50+0j-ohms (pure resistance, no reactance, just
like modern rigs are designed to face) into whatever arbitrary and scary
impedance your antenna has decided to have at the chosen operating frequency.
If the transmatch has sufficient matching range, it *is* possible to use any
arbitrary chunk of metal (like a lathe) as an antenna, though if the antenna
is markedly shorter than a half-wavelength in size, it's efficiency will not be
good.]

John, WB7EEL
Newsgroups: rec.radio.cb,rec.ham-radio
From: adam@wam.umd.edu (Adam L. Greenberg)
Subject: Anyone seen or heard from?
Followup-To: poster
Keywords: Disappeared Hello???
Organization: Workstations at Maryland, University of Maryland, College Park
Date: Thu, 20 Aug 1992 21:57:43 GMT

Anyone seen or heard from KD3FU Paul Schleck?  If you have, PLEASE
ask him to drop me a line.  I'm adam@wam.umd.edu

--Adam

From: myers@hpfcso.FC.HP.COM (Bob Myers)
Date: Fri, 21 Aug 1992 20:31:08 GMT
Subject: Re: Re: Some More CB Questions
Organization: Hewlett-Packard, Fort Collins, CO, USA
Newsgroups: rec.radio.cb

>     Well, a bad SWR will cause a low power output.  My experience with 
> Realistic radios is they are very touchy when it comes to that.  The base 
> antenna you are talking about.... The Coaxial Cable length is probably the 
> problem.  Have him measure the cable in 102" lengths (roughly 1/4 
> wavelength)  That oughta help.... if he needs say 48 feet, then he would 
> need (roughly.. 8 102" lengths)   Others I am sure will give you more 
> precise info.

The "more precise info" needs to start out, "John, you're wrong about this."

You CANNOT correct SWR problems by varying the cable length.  Especially
not by simply limiting yourself to integer multiples of a quarter wave -
for example, one-half wavelength back from the antenna (two "102-inch
sections"), the impedance at the end of the cable is the same as the feedpoint
impedance of the antenna.  If it isn't 50 ohms there, it won't be 50 ohms at
the end of the cable, either.  Moving in quarter-wave increments back from the
load simply locates the peaks or nulls of the standing wave pattern.  This
may be an interesting theoretical exercise, but offers little practical use
in getting the damned radio to work.

To correct such problems, you have the following options:

1. Tune the antenna by varying its length.  

2. Employ a matching device at the antenna (some antennas MUST have a matching
   device of some nature as part of their design, as their uncorrected
   feedpoint impedance is either way too low or way too high to be a decent
   match to 50 ohms.  The typical "beam" (Yagi) is a good example; were it
   not for the matching devices (usually either a T or gamma match), the
   impedance at the feedpoint of the driven element would be far too low for
   a good match.

3. Employ a matching device at the transmitter end (a "transmatch" or 
   "matchbox").  This results in the transmitter "seeing" the proper load,
   even though the antenna and feedline are still mismatched.  (Such a matching
   device generally does not affect the SWR on the line, but then the SWR
   in this case isn't too important as long as the cable can handle the peak
   voltages.)

The notion that there's something magical about the feedline length probably
comes from the fact that there is a thing called a "quarter-wave matching
section," which DOES employ a quarter-wave of line.  However, the 
characteristic impedance of that section is NOT the same as the rest of the
line, and must be specially chosen to match a given load (antenna) to a given
line.


Bob Myers  KC0EW   Hewlett-Packard Co.      |Opinions expressed here are not
                   User Interface Tech. Div.|those of my employer or any other
myers@fc.hp.com    Fort Collins, Colorado   |sentient life-form on this planet.
Xref: sparky rec.radio.cb:902 news.answers:2586
From: ehare@arrl.org (Ed Hare KA1CV)
Newsgroups: rec.radio.cb
Subject: Re: Q VS 10
Date: 11 Aug 92 19:07:07 EDT
Organization: American Radio Relay League

In rec.radio.cb, john.denison@yob.sccsi.com (John Denison)  writes:

>-> it, even little kids with their 100mW walkie-talkies are using 10-4
>-> and 10-20. You certainly never hear police or other government

>-> officials using Q...always 10 and 11 codes. Wake up hams and learn a
>-> lesson or two from the CB'ers and the rest of the radio world.
>
>On CB I only hear 10-4, 10-20, and a couple others. Most of the 10-codes
>aren't used as far as I can tell. I hear people who are HAM operators on
>the CB in the late evening and they use Q codes and the 10 codes
>mentioned above, but some of the 10 codes seem useless.

John,

I must point out that the Q signals were developed for use on Morse code
communications. They are technically incorrect for use in voice 
communications (although to me it will always be "QRP", not low power :-) ).
The correct way to identify my location on CW (Morse) is: "QTH Newington CT".
On CW it makes lots of sense and is understood in any language. On voice
one *should* say "My location is Newington, CT", although hams have become
comfortable with many Q signals and use them as words, just like the CB
use of statements like "My 20 is Newington, CT."

Hams and CBers both fill a different need, for sometimes different types
of people. There is no reason for us to criticize each others ways of
getting things done. If I operate 11 meters I will use the operating
practices developed there. If a CBer wants to become a ham, the information
is available. If not, the CB service is, in and of itself, a good
communication tool that should be used and respected.

73 from ARRL HQ, Ed

-----
Ed Hare, KA1CV                  ehare@arrl.org
American Radio Relay League
225 Main St.
Newington, CT  06111            There is no limit to what you can 
(203) 666-1541 - voice          accomplish if you don't care who
ARRL Laboratory Supervisor      gets the credit. - Harry S Truman
RFI, xmtr and rcvr testing  
-----
Newsgroups: rec.radio.cb
Subject: Radio Newsgroups
From: nomad@ecst.csuchico.edu (Michael Larish)
Date: Sat, 22 Aug 1992 00:14:21 GMT
Organization: California State University, Chico

Since this file never gets posted here, I figured I might pass it on.  It
explains what the various radio newsgroups are for, etc.

-----------------
Article: 23360 of rec.radio.amateur.misc
Newsgroups: rec.radio.amateur.misc,news.answers
From: ad838@yfn.ysu.edu (Michael Rolfes)
Subject: Re: Q vs 10
Organization: Youngstown State University/Youngstown Free-Net
Date: Sat, 15 Aug 1992 18:31:50 GMT


Some departments use codes to protect the officers...

Hamilton County OHIO uses "signals" ie a signal 30 is a warrant.. if it is a 30T
then it isa traffic warrant, 30M Misdemeanor, 30F Felony

to protect the officer in case he doesn't have a "secure" mike.

Michael P. Rolfes  OVR Unit #43, usr2879a@tso.uc.edu

*****************************************************

Ohio Valley REACT Inc.  #2601, CB channel 9 KHY-1303.

                               VHF  151.625 Mhz.

 

Hamilton County Disaster and Emergency Services  

American Red Cross --Standard First Aid 

American Heart Association -- Basic Life Support Certified.

**********************************************************

-- 
Michael P. Rolfes
usr2879a@tso.uc.edu
From: klee2@uoft02.utoledo.edu
Newsgroups: rec.radio.cb
Subject: Re:HANDHELD CBS
Date: 19 Aug 92 02:14:57 GMT
Organization: University of Toledo, Computer Services

The price of Maxxon 27-LP was US$65.00 when I purchased one last June
at the "Service Merchandise" retail store. Hope there is one near the
Buffolo NY area. The price might vary from region to region. The on
sale price of this item is US$60.00 as far as I could recall. I paid
the full price btw, too bad.
Anyway, the Maxxon 27-LP is a pretty good hanheld, great satisfaction.
KL
Xref: sparky rec.radio.cb:882 rec.radio.amateur.misc:14085
From: zlau@arrl.org (Zack Lau)
Newsgroups: rec.radio.cb,rec.radio.amateur.misc
Subject: Re: But wait! There's More!!!
Date: 18 Aug 92 21:49:47 EDT
Organization: American Radio Relay League

In rec.radio.amateur.misc, gary@ke4zv.uucp (Gary Coffman) writes:

lots deleted
>
>Note in case it isn't clear that the output network of a transmitter is
>itself a transformer made up of inductors and capacitors. It's job is to 
>transform a nominal 50 ohm load impedance to the output impedance of the 
>final amplifier's active device.  In the case of a transistor final, this 
>is usually only a few ohms, or even a fractional ohm in higher powered 
>amplifiers. In the case of tube amplifiers, the active device output 
>impedance is usually a few thousand ohms. The output network transforms 
>this impedance to an idealized 50 ohms. 50 ohms is chosen because it's a 
>convienent value of impedance for a coaxial cable. There's nothing magic 
>about this number. Another impedance could equally well have been chosen.
 more deleted>
>Gary KE4ZV
>
Gary is assuming that amplifier's active device is truly linear. I don't
believe this is normally the case.  Warren Bruene took the time to write up
an experiment he did in the November 1991 QST, with a further clarification
in a Technical correspondence item (May 1992 QST).  

It is not true that the impedance presented by the transmitter 
is necessarily 50 ohms when the system is operating as designed (operating
with a 1 to 1 SWR into a 50 ohm load).  

This is a case of using the wrong equations/theory.  Linear theory is fine
for approximations, but can and does fall apart when carelessly applied to
nonlinear circuits.  

Zack Lau  KH6CP/1.
From: cscon0151@uoft02.utoledo.edu
Newsgroups: rec.radio.cb
Subject: CB Trunking and Linears (was: We all kn
Date: 13 Aug 92 16:23:53 EST
Organization: University of Toledo, Computer Services

>    Any word on any results of that?   I'll keep looking n '3 and Pop. 
>Comm. magazine....   I always hope for the US to change CB to something 
>say like FM with CTCSS and Trunking capabilities.


Trunked Systems on the Citizens Band ????  I wouldn't expect to see that in
the near future.


>   Well, Ham equipment is built to much better tolerances to adjacent 
>frequency rejection and accuracy than a CB.  
 
>MORE IMPORTANT   The JUNK you see out there that CBers call "linears" are 
>actually some poor quality amplifiers that care nothing for frequency 
>accuracy.

>|------------------------------------------------------------------------|
>| John L. Wilkerson Jr.     | johnw@bluemoon.uucp    | "A realist in a   |
>|                           | johnw@bluemoon.rn.com  |  cruel world that |
>|Sysop: EastSide Connection | jwilkerson@delphi.com  | wishes to destroy |
>| (CoCo) (614) 755-2492     |------------------------|       me"         |
>|   SkyNet Node: 1/2                                                     |
>|------------------------------------------------------------------------|

The only CB linears I have seen are actually 10m linears, factory made units
that can also be used on 11m.
 

Brad Steinman
University of Toledo Computer Services
cscon0151@uoft02.utoledo.edu
From: phantom@pro-haven.cts.com (Tiffany Bloxom)
Newsgroups: rec.radio.cb
Subject: Re: Questions From A Beginner
Date: 13 Aug 92 23:03:42 GMT
Organization: ProLine [pro-haven] - Pariahs' Haven BBS, 409/693-8262, 9600-300

Well.....

        1)To adjust the power level from 2 to 4 watts, you would need to
open the CB and turn one of the variable potentiometers (or "pots")
inside...I couldn't really say which one without lookin' at it...

        2) I would not recommend a "power mike".  It is a waste of money. 
A Clean, properly modulated signal will get as good as or better results.

        Later...
        -=Phantom=- (KB5OWZ Tech+)
From: john.denison@yob.sccsi.com (John Denison) 
Newsgroups: rec.radio.cb
Subject: RE: RG-58 CABLE (WAS: WE
Date: 15 Aug 92 23:19:00 GMT
Distribution: world
Organization: Ye Olde Bailey BBS - Houston, TX - 713-520-1569
Reply-To: john.denison@yob.sccsi.com (John Denison) 

-> BTW: What are the loss/ft (or yard,etc) for RG-58, RG-8, RG-8X ?

If you can grab a copy of Radio Shack's catalog. It has the loss/ft
charts in the cable/coax section.
From: phantom@pro-haven.cts.com (Tiffany Bloxom)
Newsgroups: rec.radio.cb
Subject: Re: Some More CB Questions
Date: 13 Aug 92 23:26:48 GMT
Organization: ProLine [pro-haven] - Pariahs' Haven BBS, 409/693-8262, 9600-300

Hey....

        First, make sure that the antenna has a very good earth ground (or
at least Some kind of ground....) if it doesn't, it can really screw things
up....If it needs an earth ground, try to get a grounding rod (an
electronics store might be able to tell you where to get one....)  and
drive it into the ground.....
        Second, if that doesn't work, you Grandfather could get a matching
network.  It will match the antenna (the feedline actually...) to the
tranceiver....

        Later...

        -=Phantom=- (kb5owz...)
Newsgroups: rec.radio.cb