HDTenEightyP/NetNews huggingface dataset:
From: billn@hpcvaac.cv.hp.com (bill nelson)
Newsgroups: rec.radio.cb
Subject: Re: Basic Advice
Date: 16 Nov 92 22:21:58 GMT
Article-I.D.: hpcvaac.1992Nov16.222158.17795
Organization: Hewlett-Packard Company, Corvallis, Oregon USA

bjstaff@zds-ux.UUCP (Brad Staff) writes:
: Bryan D. Boyle writes:
: >>white fibreglass (shakespeare also makes great fishing rods-really!)
: >>coaxial, no radials, about 18' total length.  so-239 at one end, 
: >>and a metal "mounting area" at the lower end.  Rated to handle only
: >>about 25W, and exhibits reasonable vswr over the 40 channels-not the
: >>most broadband antenna, but a 20-year-old design that works reasonably
: >>well..
: 
: Bill Nelson writes:
: >If it has no ground radials, then it is sensitive to mounting height.
: >The radiation impedance changes drastically, from a few ohms to several
: >hundred ohms. 
: > 
: >That would be one way of minimizing the SWR - mount it at the height that
: >gives the best SWR at midband.
: > 
: >I personally would use an antenna with radials, or mount the antenna at
: >ground level and install my own radial system. 
: 
: Sounds like it might be a vertical half-wave dipole.  Disclaimer:  I have
: never owned one of these, but I do own a vertical quarter-wave monopole.
: :-)

Nope. It may be a half-wave vertical, but it is not a half wave dipole.
It is end fed, not fed in the middle. Look at the sensitivity of end
fed antennas, you will see that it is high for all lengths.

: Vertical half-wave dipoles aren't supposed to be terribly sensitive to
: height above the ground.  On page 3-11 of The ARRL Antenna Book (16th
: Edition), there is a graph of "Height of center of vertical half-wave in
: wavelengths" vs.  "Radiation resistance in ohms".  Here are some numbers
: derived from that graph:
: 
: .25 wavelengths	~100 ohms
: .35 wavelengths	~80 ohms
: .45 wavelengths	~70 ohms
: .55 wavelengths	~70 ohms
: .65 wavelengths	~73 ohms
: .75 wavelengths	~75 ohms

Fine - but it is not a dipole.

: I'll have to take a look at the effect of using radials on a vertical
: half-wave dipole.

You don't need radials with a dipole antenna. It would only hurt the
performance.

Bill
Xref: sparky rec.radio.cb:1379 news.answers:4119
From: cmeans@mcs213i.cs.umr.edu (Chad J Means)
Subject: CB Antenna + Lightning Storm = ? 
Date: Thu, 19 Nov 1992 21:37:07 GMT
Organization: University of Missouri - Rolla

 
I have a K40 magnetic mount whip antenna and notice that it picks up a lot of
"static" during lightning storms.  My question: "Is it a good idea to use
it during a storm?  I know that the rubber tires keep me from being grounded,
but could there be any other "ill-effects"?

Also a hint:  To keep a magnetic mount antenna from scratching your car's 
paint, try placing duck tape to the base of the magnetic. :-)
From: jbs@ee.egr.duke.edu (Joe B. Simpson)
Newsgroups: rec.radio.cb
Subject: Re: Basic Advice
Date: 22 Nov 92 21:02:34 GMT
Organization: Duke University EE Dept.; Durham, NC

In article <1992Nov22.103738.17183@hpcvaac.cv.hp.com> billn@hpcvaac.cv.hp.com (bill nelson) writes:
>
>Hm, I have never seen a half-wave antenna with ground radials. On the other
>hand, most of the 1/4 wave antennas I have seen employ them, or are mounted
>at ground level.

1/2 wave ground plane base station antennas were quite common in the mid-
to late seventies.  I had one ("Archer Crossbow") on my roof for many years.
Three gp radials, and a single vertical element about 17' tall with three
more very small horizontal elements ("cap hat?") at the top.  Feedpoint was
at the bottom.

  -joe
-- 
                You spend the night
            Like you were spending a dime

                   - Lyle Lovett

X-Spook-Fodder: CIA NSA FBI SBI Bush overthrow uprise assasinate anarchy
From: bjstaff@zds-ux.UUCP (Brad Staff)
Newsgroups: rec.radio.cb
Subject: Re: Basic Advice
Date: 16 Nov 92 04:51:55 GMT
Organization: Zenith Data Systems

Bryan D. Boyle writes:
>>white fibreglass (shakespeare also makes great fishing rods-really!)
>>coaxial, no radials, about 18' total length.  so-239 at one end, 
>>and a metal "mounting area" at the lower end.  Rated to handle only
>>about 25W, and exhibits reasonable vswr over the 40 channels-not the
>>most broadband antenna, but a 20-year-old design that works reasonably
>>well..

Bill Nelson writes:
>If it has no ground radials, then it is sensitive to mounting height.
>The radiation impedance changes drastically, from a few ohms to several
>hundred ohms. 
> 
>That would be one way of minimizing the SWR - mount it at the height that
>gives the best SWR at midband.
> 
>I personally would use an antenna with radials, or mount the antenna at
>ground level and install my own radial system. 

Sounds like it might be a vertical half-wave dipole.  Disclaimer:  I have
never owned one of these, but I do own a vertical quarter-wave monopole.
:-)

Vertical half-wave dipoles aren't supposed to be terribly sensitive to
height above the ground.  On page 3-11 of The ARRL Antenna Book (16th
Edition), there is a graph of "Height of center of vertical half-wave in
wavelengths" vs.  "Radiation resistance in ohms".  Here are some numbers
derived from that graph:

.25 wavelengths	~100 ohms
.35 wavelengths	~80 ohms
.45 wavelengths	~70 ohms
.55 wavelengths	~70 ohms
.65 wavelengths	~73 ohms
.75 wavelengths	~75 ohms

I'll have to take a look at the effect of using radials on a vertical
half-wave dipole.

Regards,

+=================================================================+
| Brad Staff                             616-982-5791 (phone)     |
| Zenith Data Systems                    616-982-5997 (fax)       |
| Hilltop Road                           b.staff@zds.com          |
| St. Joseph, MI 49085                   Amateur Radio AA8IF      |
+=================================================================+
Newsgroups: rec.radio.cb
From: ereddy@morgan.ucs.mun.ca (Edward Reddy  MI)
Subject: Question.
Organization: Memorial University of Newfoundland
Date: Fri, 20 Nov 1992 16:46:45 GMT


I have an almost new Cobra 148GTL CB I wish to sell.  This radio is in 
mint condition.  What kind of price could I expect to get for it.  Please
E-Mail me.
 
ereddy@morgan.ucs.mun.ca
From: myers@hpfcso.FC.HP.COM (Bob Myers)
Date: Fri, 20 Nov 1992 19:23:29 GMT
Subject: Re: class c
Organization: Hewlett-Packard, Fort Collins, CO, USA
Newsgroups: rec.radio.cb

> Does anyonw know what is class C cb service?
> --

Class C is, I believe, one of the common "radio control" services.  What
most people refer to as "CB" is really "Class D".  Classes A and B were
early citizen's services, intended for business use.

The local RC airplane enthusiasts are likely using the Class C frequencies,
unless they also happen to be hams - in which case they could be using
one of the RC channels set aside in the amateur 6-meter (50 MHz) band.
If I remember correctly, the Class C channels are around 72 MHz.


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: maika@bnr.ca (Jan Maika)
Subject: RFI Problem
Organization: Bell-Northern Research, Ontario, Canada
Distribution: na
Date: Tue, 17 Nov 1992 14:30:15 GMT

I recently installed a 5/8 ground plane on the side of my house. It
is and older style with 3 ground radials. It is only about about 13 feet
from the ground to the bottom of the radials. Last night my neighbour
came over and complained that I could be heard talking on his telephone lines,
radio and believe it or not his computer keyboard. I am about 15 feet from his
phone lines and hydro lines. The ground radials measure about 5-6 feet below 
these two lines. I am using a mobile set rated at 4 watts out which I have 
measured. No work has ever been done on the finals so the filters are 
all intack and unmodified.
 
My questions are,

1. Will raising the height of my antenna cut down on the RFI etc.?
   If so how high should I be about the lines?

2. I beleive my signals is clean with no harmonics but will installing
   a 27MHz bandpass filter help any?

Any help is appreciated as I am off the air until I can resolve this 
problem.

Jan S. Maika                                   Bell-Northern Research
BITNET:    maika@bnr.ca                        VOICE:  (613) 763-7769
UUCP:      uunet!bnrgate!bcars438!maika        FAX:    (613) 763-2626
LAND:      P.O. Box 3511, Station C, Ottawa, Canada, K1Y 4H7


 
 
Newsgroups: rec.radio.cb
From: billn@hpcvaac.cv.hp.com (bill nelson)
Subject: Re: where to buy swr meter ?
Organization: Hewlett-Packard Company, Corvallis, Oregon USA
Date: Tue, 17 Nov 1992 22:37:45 GMT

jxs18@po.CWRU.Edu (Jerry Sy) writes:
: 
: > 
: > what is the price range of swr meters ?
: > where can I buy one that will work decently ? is it something one
: > can construct from parts from a Radio Shark store ?

Just buy one at Rat Shack. It will be sufficient for your purposes. 

: > is there a way to fine tune an antenna without using an swr meter ?

Yes - at least two. You could use a field strength meter or a grid-dip
meter (although a modern gdm would not have a grid to dip).

: > any tricks from cb experts in the net ?

Yes. Mount the SWR meter AT THE ANTENNA.  Mounting it at the tranceiver
may produce misleading results. 

Once the antenna is tuned - you can mount the SWR meter near the
tranceiver. You will get a relative indication of SWR. It will
allow you to determine if something goes drastically wrong in
the future (without having to climb up to the antenna again).

Bill
Newsgroups: rec.radio.cb
From: billn@hpcvaac.cv.hp.com (bill nelson)
Subject: Re: Basic Advice
Organization: Hewlett-Packard Company, Corvallis, Oregon USA
Date: Tue, 17 Nov 1992 22:15:21 GMT

gary@ke4zv.uucp (Gary Coffman) writes:
: >: >If it has no ground radials, then it is sensitive to mounting height.
: >: >The radiation impedance changes drastically, from a few ohms to several
: >: >hundred ohms. 
: >: 
: >: Sounds like it might be a vertical half-wave dipole.  Disclaimer:  I have
: >: never owned one of these, but I do own a vertical quarter-wave monopole.
: >: :-)
: >
: >Nope. It may be a half-wave vertical, but it is not a half wave dipole.
: >It is end fed, not fed in the middle. Look at the sensitivity of end
: >fed antennas, you will see that it is high for all lengths.
: [deleted]
: >: I'll have to take a look at the effect of using radials on a vertical
: >: half-wave dipole.
: >
: >You don't need radials with a dipole antenna. It would only hurt the
: >performance.
: 
: Bill, a halfwave antenna, no matter whether it's fed on an end or in
: the middle, needs no radials to act as a current mirror to make up a
: "missing" half of the antenna. That's the purpose of radials on a 1/4

Isn't that what I said?

: wave monopole. Proximity to ground, real or simulated by radials, does
: have effects, *adverse* ones, on halfwave vertical antennas. First,
: the radiation pattern will be skewed upward from the ideal. And second,
: the lower end impedance will be affected by the loss resistance of the
: ground. This decreases the Q of the antenna as well as reducing the
: efficiency of the feeder match.

... short course in simple antenna theory deleted ...

: Now a *quarterwave* monopole must have ground, or radials simulatiing
: ground, at it's feed point because it's only *half* of a resonant antenna 
: and must simulate the other half in a current *mirror* formed by the
: ground plane. Otherwise, it's just a short end fed random wire with an
: arbitrary reactive impedance at it's feed point and an arbitrary, but 
: certainly skewed, radiation pattern. You can't take experience with
: quarterwave verticals and translate it to halfwave verticals. They're
: working on different principles.

I don't see anywhere that my posting was in disagreement with what you
posted. 

Thanks for providing the extra detail - I was too lazy to do so, unless
someone asked for it specifically.

: Gary KE4ZV
Newsgroups: rec.autos
From: matmcinn@nuscc.nus.sg (Brett McInnes)
Subject: Mazda Miata fears
Organization: National University of Singapore
X-Newsreader: Tin 1.1 PL4
Date: Tue, 24 Nov 1992 04:47:32 GMT


I keep hearing rumours that Mazda is going to modify the design of the
Miata; in particular, that they are going to improve the motor and jack
up the price. Can anyone confirm or [preferably!] deny this?
From: atovorni@engr.UVic.CA (Torque Monger)
Newsgroups: rec.autos
Subject: Re: How To Drive the RIGHT way!
Date: 20 Nov 92 23:15:03 GMT
Reply-To: atovorni@engr.UVic.CA
Organization: University of Victoria, Victoria, BC, Canada

In article 1egqf8INNnrp@gilligan.East.Sun.COM, mike@gilligan.East.Sun.COM (Mike Roncadori) writes:
>In article <1992Nov19.180837.12629@cbfsb.cb.att.com> ashaw@cbnewsg.cb.att.com (andrew.shaw) writes:
>>>>In article <Zyg4TB4w164w@cellar.org>, blu@cellar.org (Dan Reed) writes:
>>>>> 
>>>>>                    High Speed driving Tips, by Dan Reed
>>>>>                                  (Humor)
>>
>>Also, if you are coming up on someone in the left lane, and they
>>move right into a gap to let you pass, do not, under any circumstances,
>>complete the pass before they have to brake to avoid hitting the car
>>at the head of the gap.  After all, they were going slower than you,
>>so why shouldn't they want to go slower yet?
>>
>
>Oh, oh... And my personal favorite...
>
>When exiting your neighborhood in the morning, roll thru the stop
>sign, so you can beat the oncoming traffic. Then, drive at least
>10 MPH slower than those now backed up behind you. Even greater
>unpleasant effect can by had by tapping the brakes at every curve,
>hill crest, intersection, and oncoming car.
>
>Then, as icing on the cake, run the yellow light leading to the
>major commuter route, leaving those you slowed down to sit 5 mins.
>waiting for the next green.

And when you have the right-of-way, always stay where you are for at 
least a minute to make sure you really have the right of way.

Never use your mirrors when changing lanes. The only way to know what's
there for sure is to stare back over your shoulder and make eye-contact
with the driver behind you in the next lane so he/she can read your
intentions using telepathic abilities.

Torque Monger
From: blu@cellar.org (Dan Reed)
Newsgroups: rec.autos
Subject: Re: HOW TO AVOID HITTING THE WALL IN GARAGE
Date: 19 Nov 92 17:34:49 GMT
Organization: The Cellar BBS and public access system

ehsan@attila.weitek.COM (Ehsan Kalami) writes:

> 
> hi, I am sure a lot of people have a similar problem. Where can one buy
> blocks of cement/concrete so that we know how far to drive a car into
> garage. similar to one found in parking lots?
> thanks.


I can't see how this will help you.  Seems like your just going to hit the 
block!  I don't know what kind of car you have, but if I hit one with my car, 
I'd kiss my fog lamps, and front spoiler goodbye.

--
Dan Reed AKA Blu Max - blu@cellar.org - AnalCADGeek! - Industrial Music Maker
    68' Cougar XR-7, 89' VW Golf, 74' Honda CL360t, Vextrex Unit Lover
From: finnegan@invader.navo.navy.mil (Kenneth Finnegan)
Subject: Re: CONSUMER REPORTS
Nntp-Posting-Host-[nntpd-28546]: invader.navo.navy.mil
Reply-To: finnegan@navo.navy.mil
Organization: Grumman Data Systems	
Date: Thu, 19 Nov 1992 16:02:18 GMT

In article <lglq9kINNs18@exodus.Eng.Sun.COM>, tut@cairo.Eng.Sun.COM (Bill "Bill" Tuthill) writes:
|> I'm not a CR basher.  We subscribe to CR and find their auto reports
|> helpful, if somewhat parochial and middle-of-the-road.  Some examples:
|> 
|> 1.  The Mazda Navajo is "more reliable than average" while the Ford
|> Explorer has "average reliability", despite the fact that they are the
|> same vehicle, made at the same factory.  How could this be?

Everyone seems to be ignoring an obvious factor here.  Service.  If
the Mazda dealer takes care of a problem quickly and courteously,
with little impact to the customer, that customer is much less likely
to place as much emhpasis on the problem when filling out the
survey.  On the other hand, if the Ford dealer gives the customer
the runaround (see the horrible Ford service thread), the customer
is likely to over-emphasize the problem because it remains burned 
into their memory.

For example, if someone asked about fuel system problems with my
Jetta, I would be inclined to say that I had experienced none.
However, I did actually have a problem with my fuel transfer pump,
which was replace at no cost to me in a quick manner by the
local VW dealer.  Service can most definitely affect a customers
perspective on problems with the car, even to the point where
it can skew statistics.

Kenneth     . :: .::::
finnegan@navo.navy.mil


Newsgroups: rec.autos
From: fengxi@prancer.eche.ualberta.ca (Fengxi Zhou)
Subject: Practical Luxury Car
Organization: University Of Alberta, Edmonton Canada
X-Newsreader: Tin 1.1 PL3
Date: Thu, 19 Nov 1992 19:04:58 GMT

Hy netters.  I have been thinking this for some time.  If you are rich and
money is no object, what car would you buy for EVERYDAY use?  A Ferrari or a
Lambo sure is nice, but navigating them through downtown traffic is no fun.
Same thing can be said of M-B 600SEL.  Besides, you want to be a good father 
(or mother) and you want to pick your kid(s) up on the way home.  You even do
grocery shopping on weekends.  Of course, you like to spend vacations in the
mountains and on the beaches which happen to be a long way from where you have
your business.  Lst but not least, you don't like to see your mechanic as often
as you see your wife.  Of course, it has to be luxurous, safe, fun to drive, 
etc etc.  And the underline assumption is you LOVE driving.  So what do you
choose?

My choice is:
    BMW 750iL (for every day use)
    M-B 500SL (for weekends and when kid(s) are with grandparents)
From: mark@trident.datasys.swri.edu (Mark D. Collier)
Newsgroups: rec.autos
Subject: EGI Controller in 93 RX-7
Date: 18 Nov 92 17:14:44 GMT
Article-I.D.: trident.218
Organization: Southwest Research Institute

My Mazda service rep. just ordered an Engine Gas Injection (EGI)
controller for my 93 RX-7. This part will hopefully correct the
brain-dead way that the car runs at times. I was told that part
has been recalled and should be replaced on most of the older 
RX-7s. Unfortunately, the part is back-ordered and I don't know
when it will come in.

For those not aware of this problem, the symptoms (at least in
my car) are widely varying throttle response, occasional stalling
when cold or at idle (especially after turning on/off the AC),
and a synchronized "miss" which I only notice when the AC is on level
3 or 4. Since it is cooler now, the only problem which really bugs
me is the changing throttle response. Sometimes my car "goes like
hell" with only slight pressure on the throttle. Other times, the
response is really slow and there is markedly less power low in
the rev range. However, when the car is running "good", mileage
goes way down, but goes up when the car is running "bad". This
behavior seems consistent with fuel injection which is logically
or mechanically damaged.

Anyway, if any one else has experienced this problem, let me know.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Mark D. Collier                      Southwest Research Institute
Senior Research Analyst              Automation and Data Systems Division
Voice: (512) 522-3437                Data Systems Department
FAX:   (512) 522-5499                Software Engineering Section
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Newsgroups: rec.autos
From: jtteh@borland.com (J.T. Teh)
Subject: Re: Fast Japanese Sports Cars
Originator: jtteh@genghis.borland.com
Organization: Borland International, Inc.
Distribution: rec
Date: Mon, 23 Nov 1992 18:17:32 GMT

aas7@po.CWRU.Edu (Andrew A. Spencer) writes:


>In a previous article, kiisaka@csi.uottawa.ca (Ken Iisaka the mad pianist)) says:

>>Oh, shut up and get a Honda NSX.  End of discussion.
>                       ~~~~~~
>Acura..
>(yeah..i know, i know..couldn't let it slide though...:-)
>(it being the slip up..i know referring to the closeness
>of HONDA and Acura)

Well, it is a Honda NSX everywhere else in the world except the USA.
Seeing that kiisaka is posting from Canada and is presumably Japanese,
he's correct.

>DREW 

- J.T.
Newsgroups: rec.autos
From: hamilton@robin.rtp.dg.com (Eric Hamilton)
Subject: Advice needed - small trucks
Date: Thu, 19 Nov 92 18:20:11 GMT
Organization: Data General Corporation, Research Triangle Park, NC

I'm looking for a small pickup, something no larger than a Chevy S10 or Ford
Ranger.  Basic transportation, light hauling around town, commuting.

Essential requirement is enough backseat to cram two small children into
in a pinch.  The tiny jump seats in the S10 and Ranger extended cabs are
good enough, barely.

Questions:

1) Other than the S10, the Ranger, and the Isuzu spacecab, what
   choices are there?

2) Anything I should know about reliability, other's experiences?  I've
   never met a happy Ranger owner, but I don't have a statistically
   significant sample.

3) When did Consumer Reports last review this class of vehicle?
   [Please, no flames about the utility of CU as a information source.
    I am aware of CU's virtues and limitations and I know how to weight
    information according to the source].

4) Safety in general, and especially are the little jump seats safe when
   used with an infant or child's car carrier?

Please reply by email - I can't follow this group with any regularity.
Thanks in advance.


-- 
----------------------------------------------------------------------
Eric Hamilton				+1 919 248 6172
Data General Corporation		hamilton@dg-rtp.rtp.dg.com
62 Alexander Drive			...!mcnc!rti!xyzzy!hamilton
Research Triangle Park, NC  27709, USA
Newsgroups: rec.autos
From: tedebear@leland.Stanford.EDU (Theodore Chen)
Subject: Re: HOW TO AVOID HITTING THE WALL IN GARAGE
Organization: DSG, Stanford University, CA 94305, USA
Date: Fri, 20 Nov 92 09:01:18 GMT


i can't believe that a question about parking in the garage generated
so much traffic.  our garage had boxes and boxes and boxes stacked
against the wall.  the usual method was to ease forward until the
stack shifted alarmingly.  back up an inch and that was it.
(this was necessary because we had a '76 chevy station wagon - big.)

by the way, with respect to hanging a tennis ball from the ceiling so
you can see how far you're in - i loved the post where somebody said
his wife made him do the same thing above their bed.

-teddy
Newsgroups: rec.autos
From: wilsont@rahul.net (Timothy Wilson)
Subject: Ferrari Dino's gimme all you got.
Organization: a2i network
Date: Mon, 16 Nov 1992 20:48:11 GMT

Hi! 
If you would please, mail me stuff about the Ferrari Dino's.
I'm looking at buying one, and would like to know quirks, strong points
where the rust might be, prices, etc.

any and all info would be apreciated, opinions welcome too.

thanks!

-- 
Timothy Wilson <wilsont@rahul.net>
Newsgroups: rec.autos