HDTenEightyP/NetNews huggingface dataset:
From: baldwin@csservera.scs.usna.navy.mil (J.D. Baldwin)
Newsgroups: rec.radio.cb
Subject: Re: 5W CB radio in USA?
Date: 11 Dec 92 20:52:28 GMT
Distribution: na
Organization: Comp. Sci. Dep't., U.S. Naval Academy, Annapolis, MD
In-reply-to: randall@informix.com's message of 10 Dec 92 23:23:33 -0400

In article <randall.724044213@seashore> randall@informix.com (Randall
Rhea) writes:
>Actually, I would be concerned more about ease-of-use.  CB Handhelds
>tend to be pretty heavy.  Women and children tend to complain about
>having to lift it all the time.  (my wife does) I would probably get a
>mobile unit with a mag mount antenna (also available at Radio Shack)
>for your wife.  For you, either a handheld or another mobile unit
>would be fine.  If you have no reason to get a handheld, then get a
>mobile unit.  They tend to have better receivers.

The handheld I have in mind is pretty light, but has output power of
only 2.5W!  I'll probably go with a mobile.

>Your range will be very limited if you use only the antenna that
>comes with the handheld inside a car.  (Only a few car lengths, 
>1/4 mile at the most)  The metal of the car blocks the signal.

Yes, I verified this myself (I was already pretty sure this would be
true.  The handheld I have in mind, though, has a jack for an external
antenna, which would be a mag mount.

>Avoid the Cellular-look-alike or other very short antennas.  Get
>the mag mount that I think is around $30 at Radio Shack... the
>one in the white/blue package.  (not the cheapie special in the
>red package)  I recommend it only because it is easy to install and 
>it works reasonably well.  The best antenna is a 102'' whip, but
>I would assume that you don't want to hassle with that.

You assume correctly.  However, I also know better than to play with
one of those coiled things.

>>My main consideration is price.  I don't intend to make a hobby out of
>>this, and I'm not looking for a long-range commitment to a piece of
>>electronic gear, here.  I just want something servicable.  However, if
>>this 5W business isn't just marketing BS and I can squeeze a little
>>bit of extra range or clarity out of it, I'm willing to shell out the
>>US$20/unit for the model I have in mind.
>
>I am not sure what CB costs only $20 unless you're getting a used
>radio.  Maybe you could let me know what radio you've seen.

I meant an *extra* $20.  I was afraid that would happen.
--
 From the catapult of:              |+| "If anyone disagrees with anything I
   _,_  J. D. Baldwin, Comp Sci Dept|+| say, I am quite prepared not only to
 _|70|___:::)=}-  U.S. Naval Academy|+| retract it, but also to deny under
 \      /   baldwin@usna.navy.mil   |+| oath that I ever said it." --T. Lehrer
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
LEAVING THE NETWORK AT XMAS.  Write me after 1 Mar 93 at: LT JD Baldwin, USN
                                                          AIR OPS DEPT
                                                          USS Nimitz (CVN-68)
                                                          FPO AP 96697-2820
Newsgroups: rec.radio.cb
From: kh@sei.cmu.edu (Kurt Haverstock)
Subject: Re: QUICK RESPONSE PLEASE (Used CBs)
Organization: Software Engineering Institute
Date: Fri, 11 Dec 1992 12:56:55 EST

In article Re: QUICK RESPONSE PLEASE (Used CBs) of Thu, 10 Dec 1992 22:57:46 GMT billn@hpcvaac.cv.hp.com (bill nelson) writes:

>
>Sounds like a good price for a hot (e.g. stolen) radio that a person is
>trying to unload in a hurry. I would examine it very carefully for such
>things as Driver's License Number or SSN. There has to be a reason for the
>person attempting to unload it so cheaply - I would guess that it has such
>some sort of identification that would make it hard to sell through a  
>fence.

I'll buy this speculation, although I don't think a 'fence' would
be very interested in CB's anymore, clean or marked.  The market
is such that it probably would'nt be worth the effort. With new 
selling in the $50 range, I bet they dont get more than a few bucks
out of the things.


Kurt
From: st1q9@jane.uh.edu (Devine, Della M)
Newsgroups: rec.radio.cb
Subject: 40 channels at onces?
Date: 18 Dec 1992 23:28 CST
Organization: University of Houston
Distribution: world
NNTP-Posting-Host: jane.uh.edu
News-Software: VAX/VMS VNEWS 1.41    

  A friend of mine living in a city with many CB'ers told me a story
once about an incident a year and a half ago.
It goes a little something like this:

   There are a lot of people in this city running illegal linears
of ratings from 50w to 4000W. average being 300w.  The FCC came into
town one day and went around to everybody's house and took pictures
of their home and mobile setups and of them, with reference to their
cb handles.  They got their handles and names from people then looked
up their address using the gov's cool computer net.  They then proceeded
later that night to broadcast some message over all 40 channels at one time.
He didn't mention what they said but that got me intrigued..
How would one make a transmitter that would transmit a CLEAN signal
(not linear splatter) over ALL 40 channels simultaneously?
Would you have to have 40 radios? 40 crystals? 40 antennae? what?

Curious
william c devine ii

reply to: devine@pvhep.pvamu.edu
From: jason@ab20.larc.nasa.gov (Jason Austin)
Newsgroups: rec.radio.cb
Subject: SWR Tuning and PLL
Date: 17 Dec 1992 15:17:33 GMT
Organization: NASA Langley Research Center, Hampton, VA  USA
Reply-To: Jason C. Austin <j.c.austin@larc.nasa.gov>
NNTP-Posting-Host: ab20.larc.nasa.gov


	I've just recently bought a mobile CB, and the instructions on
the antenna says it needs to be tuned with an SWR meter.  What do
these meters measure, what do they cost, and how much will the
performance suffer if the tuning is not done?

	The CB I got says it has PLL, but it doesn't mention what PLL
is.  Does anyone know?
--
Jason C. Austin
j.c.austin@larc.nasa.gov


Newsgroups: rec.radio.cb
From: billn@hpcvaac.cv.hp.com (bill nelson)
Subject: Re: Recommendations for a QUALITY mobile CB? 
Organization: Hewlett-Packard Company, Corvallis, Oregon USA
Date: Sat, 12 Dec 1992 08:56:16 GMT

dtasman@NMSU.edu (Dan Tasman) writes:
: 
: No, I plan to use 10m _with_ a license, after I master the Morse Code and  
: upgrade to a Tech Plus license.  I wonder what CB is doing at 27 MHz if an  
: international treaty requires ham operators to have knowledge of code to use  
: frequencies under 30MHz ... is Citizens Band radio excepted? 

I think you answered your own question. CB radio is not the Amateur Radio
Service. It is covered by a different set of treaty regulations.

: 73!, even though I can't legally say that on the air _yet_ ....

Sure you can. There is nothing prohibiting it - on the CB band, or the
business bands (if you have a license).

Bill
Newsgroups: rec.radio.cb,rec.radio.amateur.misc
From: billn@hpcvaac.cv.hp.com (bill nelson)
Subject: Re: thanks...
Organization: Hewlett-Packard Company, Corvallis, Oregon USA
Date: Wed, 16 Dec 1992 01:13:41 GMT

c60c-3gi@web-3d.berkeley.edu (Masayuki Karahashi) writes:
: 
: After Wed., when my finals are finally done and over with, I am going to
: shop around at K-Mart, Price Club, Best, and such places.  But here is
: what I basically have in mind:
: 
: 	(1) get an external antenna that clips on to the trunk lid.  I looked
: 	    at one closely at Radio Shack today and fodun that it clips onto
: 	    the trunk lid with two hex screws.  I think if I put a piece of
: 	    rubber or cloth or something, that will give me a secure fit 
: 	    without leaving any marks.  (if someone has an opinion against
: 	    this, please email me back!)

I would recommend against this. The antenna is designed to run with the
screws forming a ground. If you do not want any marks, get a magnetic mount
antenna, and put it in the center of the roof, where the antenna belongs
anyway. When you remove it, tip it - don't slide it. 

Bill
From: cobra@jab.tucson.az.us (Ken Thompson)
Newsgroups: rec.radio.cb
Subject: Re: 5W CB radio in USA?
Keywords: SSB RF Output Measurements
Date: Sun, 13 Dec 92 21:51:40 MST
Organization: Just Another Bbs. Tucson, AZ

billn@hpcvaac.cv.hp.com (bill nelson) writes:

> 
> That is true for AM and FM. It is not true for SSB. It is not easy to measure
> SSB input power. I don't think that it is that easy to measure the actual
> output power - except for maximum possible output.
> 
> Bill

 
I thought it was done with a two-toned audio signal applied to the input 
(after the audio circuits have been aligned)...with the audio gain set to 
a known level, the SSB circuits (at least in my Uniden AX144, and my 
Cobra 142GTL) should then have peak power out...aligning the correct tank 
circuits should bring the power to within spec's, which is what you said 
MAX possible output.
 
That's really the only way of measuring the input power to the RF driver 
of a SSB radio, true?
From: cobra@jab.tucson.az.us (Ken Thompson)
Newsgroups: rec.radio.cb
Subject: Re: Speech compression
Keywords: Speech Compression Modulation Radio
Date: Tue, 15 Dec 92 19:33:35 MST
Organization: Just Another Bbs. Tucson, AZ

10563563@eng2.eng.monash.edu.au (ARTHUR GIANNAKIS) writes:

> Unfortunately speech compression is not really supported by too many 
> manufacturers who prefer to use straight out mike gain on their equipment. 
> This is a bit disappointing really since I had to build a seperate unit 
> myself to incorporate compression with a proper voice passband and ever 
> since I've been using it I've never looked back to straight speech 
> amplification................

 
This is all so true...much of it stems from the fact that it's a bit more 
of a challenge to build a properly functioning compression circuit that'd 
work on nearly any voice waveform applied to a microphone.
 
So, you cheat, and do it the easy way.

Newsgroups: rec.radio.cb
From: morris@eng.umd.edu (Morris S. Berman)
Subject: K40 Replacement Base Load
Date: Tue, 15 Dec 92 01:57:58 GMT
Organization: Project GLUE, University of Maryland, College Park

Does anyone have the address of the K-40 Company.
Or does anyone know where I can get a K-40 CB Antenna base load,
A low tree in the East Coast storm ripped the Mast out of the base
seciont, and cracked the metal and plastic.

-Mb
morris@eng.umd.edu


Newsgroups: rec.radio.cb
From: mellob@cary103.its.rpi.edu (Silly Putty)
Subject: TRAM D201
 
   To: Nathan FISHER2557@iscvax.uni.edu
Reply-To: mellob@rpi.edu
Organization: Rensselaer Polytechnic Institute, Troy, NY.
Date: Mon, 14 Dec 1992 16:51:14 GMT

     My mail server is having a problem finding your address so this is a

	post-it thank you.  Does anybody else have any info in modifying

	a Tram D201 for extended channel capability and high output?

		-Brett,   N1LAG

PS: Will it take FM?
Newsgroups: rec.radio.cb
From: billn@hpcvaac.cv.hp.com (bill nelson)
Subject: Re: 5W CB radio in USA?
Organization: Hewlett-Packard Company, Corvallis, Oregon USA
Date: Sat, 12 Dec 1992 09:01:10 GMT

myers@hpfcso.FC.HP.COM (Bob Myers) writes:
: > Yes. The FCC used to allow 5 watts final input. This is difficult to
: > measure, so they changed the rules to say that you could have a maximum
: > of 4 watts output. This is about what the most efficient amplifiers would
: > produce from a 5 watt input.
: 
: Ha!  It used to be said that the reason input power was originally speced
: (as opposed to output power) was that INPUT was much easier to measure!
: (After all, it's just the DC voltage and current to the final stage.)
: Measuring output power took an RF wattmeter, which was uncommon in the
: good ol' days.  Now, though, any service shop that cares about this will
: have a little Bird sitting on the bench, so the FCC gave in an speced
: RF output.  Ease of measurement had little to do with this.

That is true for AM and FM. It is not true for SSB. It is not easy to measure
SSB input power. I don't think that it is that easy to measure the actual
output power - except for maximum possible output.

Bill
From: myers@hpfcso.FC.HP.COM (Bob Myers)
Date: Fri, 11 Dec 1992 23:48:18 GMT
Subject: Re: 5W CB radio in USA?
Organization: Hewlett-Packard, Fort Collins, CO, USA
Newsgroups: rec.radio.cb

> Yes. The FCC used to allow 5 watts final input. This is difficult to
> measure, so they changed the rules to say that you could have a maximum
> of 4 watts output. This is about what the most efficient amplifiers would
> produce from a 5 watt input.

Ha!  It used to be said that the reason input power was originally speced
(as opposed to output power) was that INPUT was much easier to measure!
(After all, it's just the DC voltage and current to the final stage.)
Measuring output power took an RF wattmeter, which was uncommon in the
good ol' days.  Now, though, any service shop that cares about this will
have a little Bird sitting on the bench, so the FCC gave in an speced
RF output.  Ease of measurement had little to do with this.


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
Subject: Re: Mods for Realistic :)
From: jonc@status.gen.nz (Jon Clarke)
Date: Fri, 18 Dec 92 14:28:46 GMT
Organization: The Z*NET Global News Gateway in Parnell New Zealand.

wells@hpfcso.FC.HP.COM (John Wells) writes:

> else.   The parts will run around $250 bucks or less for the bacsics.... You 
> get them on sale at times from your friends at Casa de Ratas.   As far as the
> 100 watt mod... that can run around ....oh say ~$20,000, Knowhatimean?  ;-)
> 
>  John (I was converting CB sets to the ham band when everyone else was 
>        converting Ham rigs for use on CB..... Great fun) in the Fort
> 
> 
> 
> 
> 

 
 Hey John, it looks like the conversions slipped back the other way,
 and reprogrammed your thought patterns.
 
 I guess this is what we expect from various hams these days.


 Jon Clarke                                                     Z*NET Pacific
 -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  jonc@status.gen.nz           GEnie: J.Clarke6        Hexagon: HSBC NZM EBD
  Phone: (+649) 358-5589       IFNA : 3/772:105        GEM    : NZM CABLES
 =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
     "Practise safe computing ! Wear a write protect tab!" jc 1988
From: cobra@jab.tucson.az.us (Ken Thompson)
Newsgroups: rec.radio.cb
Subject: Re: Mods for Realistic :)
Keywords: Mod's to a FlavorRadio!
Date: Thu, 17 Dec 92 22:24:48 MST
Organization: Just Another Bbs. Tucson, AZ

wvogel@MtHolyoke.edu (keeper of the tone) writes:

> where in the world do you think your going to use that radio????????
> fact is most RS radio pll's wont allow a freq spread that you are looking
> for or do fm with out serious modifacations to the ckts
> if you have the 10 mtr RS unit i have been led to beleive that it cannot
> be modified to go out of band
> 
> wayne
> AJ0AE

 
Gee, Wayne, better re-read the post, then read the Subject: line again...
 
I thought those FlavoRadio's were actually pretty easy to mod for tuning; 
a bit more of a challenge to get 100W of RF into those things, tho.. :D

Newsgroups: rec.radio.cb
From: dtasman@NMSU.edu (Dan Tasman)
Subject: Re: Linears vs. legal system
Organization: New Mexico State University
Date: Tue, 15 Dec 1992 22:50:04 GMT

tcs@ll.mit.edu (Tom Sefranek) writes:

: I'm sorry, but I must make this VERY clear...
: 
: Anyone who believes (and practices) that an amplifer can run class C for
: effiencies sake, and will still be linear enough for even SSB mode is
: contributing to the horror on the bands.  Read MY lips!!!
: 
: Class C is VERY NON-linear!!!  (Repeat after me,)
: 
: Class C amplifiers cannot amplify Sideband or AM correctly.
: 
: (Again.)
: (Until you really understand!)
: 
-------------------------------------------------------------------------------
:  /-/-/-/-/             |                Informal Class Sunday's @ 13:00 EST,
:  /-/-/-/-/         /---/---/            followed by a N&T VE Session @ 15:00,
:      |                 x         |      @ Navy Barracks @ Fort Devens, Ma.
:   /--/--/              x     /---/---/  Second & Fourth Mondays of the month.
:      x       .       --x--       x      @ Lura A. White School  Shirley, Ma.
:     -x       |         x         x      E-Mail or call 617-981-3474 (Work)
:      x       |       __x         x      Call in: 145.41, 145.45, 448.625 Mhz.
:      x_______|_______||x         x      Ham Radio (Elmer) Night @ 19:00 EST
:     /                ||x\      /   \    First, Third, (Fifth) Mondays.
:   /-----------------/||x \   /___ ___\  Thomas C. J. Sefranek  WA1RHP
:   | [ ] [ ] ## [  ]| ||x  | ||  | |  || 112 Great Road  Shirley, Ma. 01464
:   |         ##     | ||x  | ||  | |  || Home Phone: 508-425-6672
:  
-------------------------------------------------------------------------------
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

With an antenna array like that, who needs a linear? :)

--
   Dan Tasman                                       dtasman@dante.nmsu.edu
                                                     molson@rever.nmsu.edu
   -----------------------------------------------------------------------
   "I think that I shall never see a billboard lovely as a tree
    Indeed, unless the billboards fall, I'll never see a tree at all."
                                                                Ogden Nash
Newsgroups: rec.radio.cb,rec.radio.amateur.misc
From: hamid@telesoft.com (Hamid Radvar @lone)
Subject: Re: thanks...
Organization: Alsys Group, San Diego, CA, USA
Date: Tue, 15 Dec 1992 18:22:15 GMT

In <1992Dec15.100350.5431@pasteur.Berkeley.EDU> c60c-3gi@web-3d.berkeley.edu (Masayuki Karahashi) writes:


[stuff deleted]

>	(2) get a Radio Shack TRC-479 (or equivalent from other place) and
>   	    put that in my car, connecting the power source to the cigarette
>	    adapter.  

When I try to power up my walkie talkie with the cigarette adapter, I
get lots of noise when the car is running.  I'd think you might run
into the same problem unless there is a way to filter out the noise.
Does anyone know of such filter?

>---Masayuki Karahashi
>c60c-3gi@web.berkeley.edu
>"I think its time to change major"

Hamid Radvar
From: cobra@jab.tucson.az.us (Ken Thompson)
Newsgroups: rec.radio.cb
Subject: Re: Speech compression
Keywords: Speech Compression Modulation Radio
Date: Sun, 13 Dec 92 21:34:35 MST
Organization: Just Another Bbs. Tucson, AZ

johnw@bluemoon.use.com (John L. Wilkerson Jr.) writes:

>    My Uniden Grant has a speech compression feature.  I am familiar with 
> this feature and want to know what other radios out there have this 
> feature.
>  
>     Is the "automatic modulation control" the modern phrase for speech 
> compression, or is it something different.  I hear a lot of junk sounding 
> radios out there, whereas mine always sounds great.

 
Well, not exactly, but it's close enough where you could say it's the 
same thing...
 
Speech compression is basically taking the loudest signals, and 
attenuating them, and the quietest, and amplifying them.  AMC is fairly 
close; you're just trying to keep from over-driving the modulator of the 
radio by keeping all signals below a maxiumum level.
 
Speech compression is a bit better in a noisy environment (cab of a loud 
vehicle, for example), since it does seem to attenuate some of the 
extraneous noise...sort-of depends on the particular sound hitting the 
mic.

Newsgroups: rec.radio.cb
From: gary@ke4zv.uucp (Gary Coffman)
Subject: Re: I know they are illegal...
Reply-To: gary@ke4zv.UUCP (Gary Coffman)
Organization: Gannett Technologies Group
Date: Sun, 13 Dec 1992 15:45:12 GMT

In article <4gmNVB2w165w@status.gen.nz> jonc@status.gen.nz (Jon Clarke) writes:
>gary@ke4zv.uucp (Gary Coffman) writes:
>
>> You can do AM the other way, as plate moduation of a Class C
>> RF amplifier. If done *right*, this can deliver excellent AM
>> with somewhat lower total power consumption. But doing it right
> 
> Gary, over the years I have toyed with various tubes. I found the 
> 6146b to be very good in this portion of the band. I have tried
> from 807 driving 813's to QQV03/40a all work with ample satisfaction
> in Class "C".

Yes, nearly all the tubes in RF service work well in Class C. What
has to be done right is the modulator and the tank design. Getting
clean audio requires Class B audio stages and excellent and heavy
and expensive modulation transformers. Since the modulation will 
shift the operating point of the Class C amplifier dynamically, and 
hence it's output impedance, the networks surrounding the tube have 
to be carefully designed to deal with the excursions or stage efficiency
will be adversely affected. It's not terribly difficult to do properly,
but it's not really cheap or casual.

Gary KE4ZV
From: wells@hpfcso.FC.HP.COM (John Wells)
Date: Wed, 16 Dec 1992 15:27:12 GMT
Subject: Re: Mods for Realistic :)
Organization: Zanzor of the CLOUDS
Newsgroups: rec.radio.cb

In rec.radio.cb, dtasman@NMSU.edu (Dan Tasman) writes:

>Does anyone have any mods for a Radio Shack Flavoradio? I want to make it T/R  
>from 25MHz to 30MHz, in AM FM, CW and SSB modes. Any tune up ideas that would  
>allow me to transmit at 100 watts would be apreciated as well. :) 
> 

Funny you should ask.... why sure!  I got a mod kit for ya that is somethin
else.   The parts will run around $250 bucks or less for the bacsics.... You can
get them on sale at times from your friends at Casa de Ratas.   As far as the 
100 watt mod... that can run around ....oh say ~$20,000, Knowhatimean?  ;-)

 John (I was converting CB sets to the ham band when everyone else was 
       converting Ham rigs for use on CB..... Great fun) in the Fort

   





Newsgroups: rec.radio.cb
From: billn@hpcvaac.cv.hp.com (bill nelson)
Subject: Re: I know they are illegal...
Organization: Hewlett-Packard Company, Corvallis, Oregon USA
Date: Sun, 13 Dec 1992 08:20:40 GMT

gary@ke4zv.uucp (Gary Coffman) writes:
: In article <1992Dec11.211728.27332@hpcvaac.cv.hp.com> billn@hpcvaac.cv.hp.com (bill nelson) writes:
: >
: >High powered stations do it that way. However, I didn't think that we
: >were talking about commercial stations. It is also the most expensive
: >way, by far, of accomplishing the task. 
: 
: Well screen modulation is cheaper, but it's not as good. High level
: modulation is cheaper than linear amplification for AM signals. Using
: a Heising modulator, you can substitute another tube for the expensive
: modulation transformer and still get high quality AM at low cost.

Agreed. It all depends on how good a signal you desire/need. Also whether
you want to be able to obtain 100% modulation on peaks.

In any case, does anyone use AM anymore - except on CB and 160M?

Bill
From: cobra@jab.tucson.az.us (Ken Thompson)
Newsgroups: rec.radio.cb
Subject: Re: K40 Replacement Base Load
Date: Tue, 15 Dec 92 19:30:21 MST
Organization: Just Another Bbs. Tucson, AZ

morris@eng.umd.edu (Morris S. Berman) writes:

> Does anyone have the address of the K-40 Company.
> Or does anyone know where I can get a K-40 CB Antenna base load,
> A low tree in the East Coast storm ripped the Mast out of the base
> seciont, and cracked the metal and plastic.
> 
> -Mb
> morris@eng.umd.edu
> 
> 

 
My local CB shop had a complete set of "spare' parts for K40's available, 
and I believe that the base load was also one of those parts.
 
Let's see, let me find that address...
 
Hmmm...the only thing I don't have is a street address...
 
American Antenna
Elgin, Illinois  60123
 
Hope this helps...

Newsgroups: rec.radio.cb