HDTenEightyP/NetNews huggingface dataset:
From: wtm@uhura.neoucom.edu (Bill Mayhew)
Subject: Re: Nuvistor audio amplifier schematic
Organization: Northeastern Ohio Universities College of Medicine
Date: Tue, 15 Dec 1992 02:09:29 GMT

A good tutorial example for working with 6CW4 Nuvistors is an old
Tektronix Type W plug-in module.  That is a high gain diff amp for
DC to low MHz.  I have one that dates from about 1965 or so.  The
input stage is a pair of 6CW4s that are mounted in a block of
aluminum to apparently equalize temperature.  The assembly is
cleverly shock mounted to help isolate vibration - of which there
is plenty in old 5xx series scopes from the big fan(s), for
instance.  The vertical output is transistorized, so there are some
good lessons there on interfacing -- note the unit is DC coupled
down to 1 mV/cm, though there is a quite necessary DC balance pot
on the front panel.  Finding a Type W manual at a hamfest might
provide some interesting reading for esrtwhile tube hackers.
Actually, a type W itself ought to be cheap and would provide the
nice mounting bracket which could be used for other projects.

It is so much easier to work with solid state components that I
doubt I'd bother starting any new projects with tubes.


-- 
Bill Mayhew      NEOUCOM Computer Services Department
Rootstown, OH  44272-9995  USA    phone: 216-325-2511
wtm@uhura.neoucom.edu (140.220.1.1)    146.580: N8WED
Newsgroups: sci.electronics
From: belal@sco.COM (Bela Lubkin)
Subject: WANTED: datasheet for Motorola MC146818 Real Time Clock chip
X-Claimer: I >am< R Pentomino!
Organization: R Pentomino
Date: Sat, 12 Dec 1992 05:31:22 GMT

Can anyone email me, or point me to a datasheet for the Motorola
MC146818 Real Time Clock chip used in IBM AT type computers?

What I'm most looking for is a table of the possible values for bits 3:0
of "status register A" -- the "rate selection bits".  The documentation
I have says that the IBM BIOS initializes these bits to 0110, thus
selecting a 1024 Hz square wave.  Unfortunately, it doesn't bother to
document what the other 15 combinations mean.  If you have only a
printed datasheet, let me know if you're willing to type in that table.

I suspect there's a lookup table in the chip, and that there might be
different versions of the chip with different lookup tables.  Any
further information or warnings about that would be appreciated.

If I receive an online datasheet I will make it available to others;
send me a request now (via email).  I do not intend to post it -- the
concept of a "summary" of a datasheet doesn't seem to make much sense...

Thanks in advance!

Bela Lubkin  * *  //  filbo@deeptht.santa-cruz.ca.us    ZURC ATNAS morf EVIL!
     @     * *   //  belal@sco.com   uunet!sco!belal  uunet!sco!deeptht!filbo
R Pentomino  * \X/  Filbo @ Pyrzqxgl +1 408-476-4633 and XBBS +1 408-476-4945
From: ken@hpcuhe.cup.hp.com (Kenneth M. Sumrall)
Date: Mon, 14 Dec 1992 22:52:40 GMT
Subject: Static Column vs. Nibble Mode DRAM?
Organization: Hewlett Packard, Cupertino
Newsgroups: sci.electronics

I've been wondering for quite a while...

What is the difference between "Static Column DRAM", "Nibble Mode DRAM", and
"Fast Page Mode" DRAM?

Also, what is "Write Per Bit", and why do I want it?

Enquiring minds want to know, like me!

Thanks 1E6 in advance.

| Ken Sumrall                          |     Internet: ken%hpda@hplabs.hp.com |
| HP California Language Labs          |           UUCP:  ...!hplabs!hpda!ken |
|    "I'd stomp desert dope heads for some gas in my moped!" - Bill the Cat   |
|              "What a stupid world" -Calvin (speaking to Hobbes)             |
From: bomr@erich.triumf.ca (Rod Nussbaumer)
Newsgroups: sci.electronics
Subject: Re: 87c51 or   8051 with eprom????
Date: 11 Dec 1992 15:30 PST
Organization: TRIUMF: Tri-University Meson Facility
Distribution: world
NNTP-Posting-Host: erich.triumf.ca
Keywords: 8751 8051
News-Software: VAX/VMS VNEWS 1.41    

In article <1992Dec9.130311.18309@ms.uky.edu>, billq@ms.uky.edu (Billy Quinn) writes...
>I have an 8051 based design and I am not sure whether I should use an
>8051/EPROM/latch or just the single 8751 for mass production.  My design uses 
>no external memory and the code is less than 1K.  I'm looking for a decision 
>based on the cost of 1000 PCB's made (sort of a fictional situation).  I 
>will make the following statements assuming that I am correct, and let any
>one out there interested in commenting tell me why I am right or wrong.
> 
>1) Using an 8051 with an EPROM and latch will require more board space
>   and holes to drill.  This will also make PCB layout a little tougher
>   and a more expensive process.
> 
>2) The 87c51's cost way more than 8051/EPROM/latch but it will still be
>   cheaper to do it this way because the added cost of the PCB (using
>   8051/EPROM/latch) will be greater.

	You've overlooked a few terms in the equation.  
	1.  The cost of programming the EPROM vs the 87C51
	2.  The additional costs associated with the EPROM,
	    such as the address latch, sockets, assembly, procurement
	    costs, additional bypass caps, and possibly greater
	    power supply costs.  There may be other costs I've
	    overlooked.
	3.  Field upgradabilty.  Cheap with EPROM, expensive with
	    87C51.  Also, you can build the device with the possibilty
	    of using various EPROM sizes, and purchase based on
	    best cost more easily.  Same goes for the CPU if it's
	    decoupled from the PROM.
	4.  The quality of the device will *generally* be better if
	    it has fewer parts.
	5.  The 1000 part number is about where mask programmed parts
	    start to become viable.  These will be a lot cheaper than
	    EPROM CPUs.  Also, one-time-programmable (OTP) EPROM CPUs
	    are available, which can significantly reduce the cost.
	6.  An alternative to the ordinary EPROM is the Intel 87C64
	    and 87C257 EPROM parts, which have built-in address latch.

	Hope this gives you something to chew on...

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  Rod Nussbaumer, Programmer/Technologist       Bitnet: BOMR@TRIUMFER
  TRIUMF --- University of British Columbia,  Internet: bomr@erich.triumf.ca
  Vancouver, BC, Canada.                         Phone: (604)222-1047 ext 510
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Newsgroups: sci.electronics
From: elmquist@pez.ssesco.com (Chris Elmquist)
Subject: wired IR repeater?
Organization: SSESCO
Distribution: na
Date: Mon, 14 Dec 1992 20:22:05 GMT

This may have been discussed here recently... if so, perhaps someone
can point me to the archive.

What's involved in building a wired IR repeater ? (to control equipment
inside a closed cabinet for example).  Is there more to it than just
a receiver, amp, and transmitter LED ?  I seem to remember some discussion
where a 555 timer was being used (to re-time perhaps ?)

Does anyone have a circuit for such a beast ?  I know where to buy them
(for $50+) but I'm interested in integrating a homebrew circuit...

Thanks.

Chris


--
Chris Elmquist, N0JCF
elmquist@SSESCO.com
73267.2711@Compuserve.com
(612)342-0003@work (8am-5pm CST6CDT)
Xref: sparky sci.electronics:21106 sci.energy:6247 rec.autos.tech:16881
From: smckinty@sunicnc.France.Sun.COM (Steve McKinty - Sun ICNC)
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Date: 17 Dec 1992 15:15:53 GMT
Organization: SunConnect
Distribution: world
NNTP-Posting-Host: hardy.france.sun.com

In article <1992Dec17.010235.986@cmkrnl.com>, jeh@cmkrnl.com writes:


> 
> And even if the container does hold, we're not out of the woods yet.  
> If the container doesn't break, it is because it is able to absorb the energy.
> Which means that the energy STILL gets turned into heat -- it's just that it
> isn't enough heat to break the container.  The container, nonetheless, is going
> to get damned hot.  
> 
> The only way around this is to make the container so sturdy that the flywheel
> keeps spinning in the worst collision imaginable. 

Not really, just up to the point where the collision is so bad that a few
dozen kWh of flywheel energy isn't going to make a significant difference ;-) 

Steve
From: louis@aupair.cs.athabascau.ca (Louis Schmittroth)
Newsgroups: sci.electronics
Subject: Re: DOES AMERICA SAY YES TO JAPAN? - Off track!!
Date: 19 Dec 92 02:16:03 GMT

burke@tss.com (Jim Burke) writes:

>This is not Japan bashing.  It is U.S. government policy bashing.  There
>are many ways our government could help our industries to compete without
>creating abusive monopolies.  Did anyone here benefit from the AT&T
>break-up?  How much farther along might we be in high-tech digital communications
>if one company was running the show?  How much cheaper might our phone bills
>be?  

Right on.  Why is legal for Toyota and GM to collaborate (i.e. built a
joint assembly plant in Fremont, CA) and not Ford and Chrysler, for
example.  BMW and Daimler-Benz in Germany cooperate in joint factories,
not for assembly of complete cars, but in specific components to get an
advantage *over the foreign competition*.

A real tragedy for America was the breakup of AT&T.
--
Louis Schmittroth louis@cs.athabascau.ca
NW 1/4 18 67 21 W4 Alberta.  
Newsgroups: sci.electronics
From: markz@ssc.com (Mark Zenier)
Subject: Re: Where to get 8097/7 microcontrollers
Organization: SSC, Inc.,  Seattle, WA
Date: Sat, 12 Dec 1992 21:19:39 GMT
X-Newsreader: TIN [version 1.1 PL6]

jhwhit01@ulkyvx.louisville.edu wrote:
: In article <Bz5528.4HI@newsserver.technet.sg>, kewta@solomon.technet.sg (Kew Tow Ann) writes:
: > Would appreciate if anyone knows of a mail order source for Intel 8096/7
: > micrcontroller? 
:  
: Try JDR Microdevices.  They have the 80C96 and 80C97 listed for 95cents each.

Those are tristate bus buffers made by National, 
not a 16 bit microcontroller.

Great choice of part number ;-).

Mark Zenier  markz@ssc.wa.com  

From: stanb@hpnmdla.sr.hp.com (Stan Bischof)
Date: Fri, 11 Dec 1992 20:04:57 GMT
Subject: Re: battery capacities?
Organization: Hewlett-Packard, Santa Rosa, CA
Newsgroups: sci.electronics

In sci.electronics, jmorriso@ee.ubc.ca (John Paul Morrison) writes:

    Does anyone know ballbark numbers for battery lifetime @ given currents?
    Or mAh numbers the way rechargeables are always quoted? I assume I'll be
    ising alkaline cells.

You may want to check out the Dec 92 issue of Electronic Products.

They have a fairly broad comparision of various battery technologies, 
including ratings and the like.

Stan Bischof
HPSR
From: walvdrk_r@research.ptt.nl (Kees van der Wal)
Newsgroups: sci.electronics
Subject: Re: 486DX2 Crystals
Date: 20 Dec 92 14:45:39 GMT
Organization: PTT Research, The Netherlands

> In article <1992Dec16.011918.25341@eng.ufl.edu>, iqbal@omaha.eel.ufl.edu
> (M.Iqbal) writes: 

> > In article <1992Dec12.003507.1@research.ptt.nl>, walvdrk_r@research.ptt.nl
> >(Kees van der Wal) writes: 

> > |> [about clock frequency to be fed to 486DX2]

> > |> Though I still wonder where my DX2 get's its 66MHz
> > |> clock from if the crystal runs at 33MHz only. Does it contain some
> > |> internal clock doubler circuitry? 

> > Square wave have infinte number of frequencies: a fact explained in 
> > any introductory communication book. If you do not believe me than 
> > try finding Fourier Transform of a pulse train or see a specturm
> > of a pulse train on a spectrum analyzer. 

I believe the book. The book say that symmetric waveforms have no even
harmonics, so the probably symmetric 25 or 33MHz clock has to be converted into
something asymmetric to be useful. 

It would require some kind of filtering to select the second harmonic. As 
having some LC-filtering on-chip doesn't seem very likely, I'm still wondering 
how the 486-designers made it work.

Regards, <kees>
From: smithr@teecs.UUCP (Robert Smith)
Newsgroups: sci.electronics
Subject: Re: Static electricty problem
Date: 15 Dec 92 18:47:13 GMT
Organization: Litton Systems, Toronto ONT

ESD is nasty stuff. Don't forget that as well as the arc when static
jumps it also carries a field; this is probably what is locking up
your macjhine. A typical buildup on carpets is in the 12Kv region and
vinyl tile is around 4Kv. Both direct injection (discharge) and ehnhanced
field produce a double exponential pulse. The peak cuurrent for a
discharge at 12Kv is in the area of 8 amps; the field can produce a
peak current of up to 22 amps. I don't know what's in your keyboard
but I'd bet the pulses are seytting up an undefined condition that you
reset by powering down. when you unplug the keyboard. Eventually the
machine will probably fail if you don't control the static; bipolar
devices will burn or melt due to the current and MOS will melt when
the voltage is high enough to puncture the oxide layer. BTW the duration
of a stsatic pulse is in the area of 50 to 150 nanoseconds.

Bob.
Newsgroups: sci.electronics
From: henigan@quando.quantum.de (Kevin Henigan)
Subject: How full is a nicad
Organization: Quantum Software GmbH, Dortmund, Germany
Date: Tue, 15 Dec 1992 10:39:54 GMT

I believe you can tell how full a nicad is from it's Voltage, so does
anybody have a table with voltage & capacity in % full?

With an automatic NiCad charger, at what voltage do they shut off or 
lower the Amps?.

Many Thanks.

-- 
 Kevin Henigan. UUCP:     {backbone}!unido!quando!henigan OR henigan@quando.uucp
  Quantum GmbH  Bitnet:   henigan%quando@UNIDO(.bitnet)
    Dortmund    internet: henigan@quantum.de, or henigan@quando.quantum.de
    Germany     advert  : PEDIGREE - the only genealogy IIGS prog with a GUI
From: ame@matt.ksu.ksu.edu (Abdulrahman M El-Koubysi)
Newsgroups: sci.electronics
Subject: what is V107J(G)573-8514 and where can I buy it????
Date: 14 Dec 1992 08:13:38 -0600
Organization: Kansas State University
NNTP-Posting-Host: matt.ksu.ksu.edu
Summary: Trying to find out what is V107G573-8514 and where I could buy it....
Keywords: KX-T2340, INTEGRATOR, TELEPHONE, PANASONIC

I got this NATIONAL-PANASONIC telephone that quit working.  I believe the 
part I need is V107G573-8514.  I think it is an AC-integrator, but I am not
sure. Does anybody know what this part is and where I could buy it. Thank you 
in advance.


A. R. El-Koubysi          | Internet: ame@matt.ksu.ksu.edu
College of Engineering    | Bitnet  : ame@ksuvm
147, Seaton Hall, KSU     | Phone   : (913) 532-5580 
Manhattan, KS 66506       | Fax     : (913) 532-6944
From: mont@netcom.com (Mont Pierce)
Newsgroups: sci.electronics
Subject: WANTED: Pspice 5.1 libraries
Date: 20 Dec 92 03:14:21 GMT
Organization: Netcom - Online Communication Services  (408 241-9760 guest)

I have downloaded pspice 5.1 evaluation version for windows but there 
seems to be several libraries missing.  The following libraries are 
mentioned in the readme file but were not in the zipped ftp files.

    burr_brn.slb
    dig_ecl.slb
    opto.slb
    misc.slb
    special.slb
    swit_rav.slb
    swit_reg.slb
    thyristr.slb
    xtal.slb
    dig_pal.slb
    dig_gal.slb
    europe.slb
    marker.slb

Can someone send these to me, or let me know if they are available
on any ftp site?

Thanks,

-- 
Mont Pierce

+-------------------------------------------------------------------------+
| Ham Call: KM6WT             Internet:  mont@netcom.com                  |
|    bands: 80/40/20/2        IBM vnet:  mont@vnet.ibm.com                |
|    modes: cw,ssb,fm                                                     |
|      qth: Fremont, CA       Religion:  Jehovah's Witnesses    9/72      |
+-------------------------------------------------------------------------+
Newsgroups: sci.electronics
Subject: EDUCATION
From: mellob@warren1c.its.rpi.edu
Date: 13 Dec 92 14:22:07 +1000

 I think Mr. Kolstad has hit the nail right on the head.
  	We have learned and practiced prolifically throughout
	the eighties, the method of "passing the buck." You can't
	blame it on the schools. You can't teach someone who doesn't
	want or know how to learn. The educatioal problems of this
	nation, in my opinion, start at a very early age in the home.
	When children are impressionable, they should be encouraged
	to learn and to develop a curiousness about the world aruond him/her.
Reply-To: mellob@rpi.edu
Organization: Rensselaer Polytechnic Institute, Troy, NY.
Date: Sat, 12 Dec 1992 20:46:53 GMT

 As for the japanese school system, I, like Joel, don't think i would
	particularily enjoy it there. All hard work and little play
	makes me cranky and not WILLING to learn. This is the impression
	I get of Japanese and Chinese school systems.

 Does anybody know anything about the German school system? A freind of mine
	spent some time in school in Germany and told me that they were
	"wicked smart", mostly because of the competetiveness of the students.

 Not to say that competetiveness among students can't become excessive. I
	have been told (rumors?) that at MIT one time, a student asked his
	roomate for help on a specific problem. The roomate refused simply
	because he felt he was in serious competition with everyone else.

 When the Buck finally stops goin round, we'll be able to see where the real
 problem lies.
			-BRETT MELLOR
From: weisberg@ee.rochester.edu (Jeff Weisberg)
Newsgroups: sci.electronics
Subject: Re: Nuclear Magnetic Resonance (NMR/MRI)
Keywords: Think Snow!
Date: 17 Dec 92 17:21:20 GMT
Organization: Univ of Rochester, College of Engineering and Applied Science

In article <BzDI7y.53I@cantua.canterbury.ac.nz> geoffrey@cosc.canterbury.ac.nz (Geoff Thomas) writes:
/* 
/* I am wondering whether an NMR machine could be run 'inside-out'. As
/* far as I understand them, NMR imagers consist of a toroidal magnet
/* system, through which the subject is placed. Would it be possible to
/* use a bar magnet type of configuration so that the subject didn't
/* need to be placed within the physical magnet structure?
/* [ascii graphic deleted] 
/* 
/* Can it be done? What range would the system typically be capable
/* of measuring? How big would it be? How much power would be required?
/* 
/* Any help much appreciated. Thanks in advance,
/* Geoff Thomas

From what I understand about MRI, your object must be within a
uniform field. The cylindrical magnet produces an extremely
uniform field. A bar magnet produces a non-uniform field, and thus
would need be awful large to produce a field which is sufficintly
uniform over the region containing the object.

-jeff
Xref: sparky sci.electronics:21239 sci.energy:6296 rec.autos.tech:16976
From: carl@SOL1.GPS.CALTECH.EDU (Carl J Lydick)
Newsgroups: sci.electronics,sci.energy,rec.autos.tech
Subject: Re: Flywheel batteries as EV power source
Date: 20 Dec 1992 23:17:29 GMT
Organization: HST Wide Field/Planetary Camera
Distribution: world
Reply-To: carl@SOL1.GPS.CALTECH.EDU
NNTP-Posting-Host: sol1.gps.caltech.edu

In article <1992Dec18.032310.12293@ast.saic.com>, gregor@kafka.saic.com (gregg hanna) writes:
=
=I've wondered about this in other contexts, but I think it applies
=to the flywheel discussion quite well...
=
=Since Halon works by interferring with the burning process, what
=would happen if a mass of gassified flywheel housing breached a Halon
=tank, thus releasing Halon, on the way to mixing with the air?

Then you'd have the additional energy from the release of the Halon added in.

=At least some energy would be absorbed heating up the Halon as it
=expands from the tank, and then the mixture would hit air.

A trivial fraction of the energy involved.  A big problem in this discussion is
that many people simply don't seem to have the vaguest idea as to just how much
energy is involved.

=What would this look like?  I know the heat has to go somewhere,
=but since the Halon interferes with combustion would it mitigate
=the damage?

What combustion?  We haven't even considered what combustion might do.
--------------------------------------------------------------------------------
Carl J Lydick | INTERnet: CARL@SOL1.GPS.CALTECH.EDU | NSI/HEPnet: SOL1::CARL

Disclaimer:  Hey, I understand VAXen and VMS.  That's what I get paid for.  My
understanding of astronomy is purely at the amateur level (or below).  So
unless what I'm saying is directly related to VAX/VMS, don't hold me or my
organization responsible for it.  If it IS related to VAX/VMS, you can try to
hold me responsible for it, but my organization had nothing to do with it.
Newsgroups: sci.electronics
From: jbs4930@usl.edu (Scott Jeffrey B)
Subject: Re: Is there a FAQ file for sci.electronics?
Organization: University of Southwestern Louisiana
Distribution: usa
Date: Sun, 13 Dec 1992 09:45:40 GMT

In article <1992Dec12.163816.4879@ncar.ucar.edu> ren@rap.ucar.edu (Ren Tescher) writes:
>In article <mcfearin.724104696@dhostwo> mcfearin@convex.com (Lee Mcfearin) writes:
>>jbs4930@usl.edu (Scott Jeffrey B) writes:
>>
>>>If there is, could someone please e-mail it to me or
>>>tell me where I might be able to ftp it?
>	The original question was, 'Is there a FAQ (Frequently Asked 
>Question) for this newsgroup?'
>	The answer is,
>YES! and you just asked it!
>B^)
>ren n0pvi
>dona nobis pacem


Nope.  My original question was, "Is there a FAQ *FILE*"
--
Brett Scott
jbs4930@usl.edu
Newsgroups: sci.electronics
From: dbushong@wang.com (Dave Bushong)
Subject: Re: Nuvistor audio amplifier schematic
Organization: Wang Labs, Lowell MA, USA
Date: Sun, 13 Dec 1992 19:02:18 GMT

mjohnson@netcom.com (Mark Johnson) writes:

>I've heard that someone designed line-level audio
>amplifiers using Nuvistors (!) and that the results
>were impressive (!!).  I'd appreciate any information
>about these, ideally a schematic.  Thanks!

It sounds like it was a project that had a requirement that
all parts must be from a junkbox. VHF/UHF parts are probably the
last active element that I'd select for in an audio amp.  Unless
I had no choice (like I was the professor on Gilligan's Island,
for example).

Dave
-- 
Dave Bushong, Wang Laboratories, Inc.   Amateur Radio Callsign KZ1O
Project Leader, OCR products            kz1o@n0ary.#noca.ca.na
Internet: dbushong@wang.com
From: sehat@iitinc.uucp (Sehat Sutardja)
Newsgroups: sci.electronics
Subject: Re: 486DX2 Crystals
Date: 16 Dec 92 19:47:06 GMT
Organization: Integrated Information Tech.

From article <1992Dec16.011918.25341@eng.ufl.edu>, by iqbal@omaha.eel.ufl.edu (M.Iqbal):


> Anyways, one should be able see that square wave have harmonics all over 
> the frequency band. What CPU is doing is picking up a harmonic of the input
> clock frequecny. Therefore, second harmonic of 25 mhz is 50 mhz and similarly
> second harmonic of 33 mhz is 66 mhz. Usually, a CPU has a Phase lock loop
> to lock on the second harmonic of the clock frequency; thus, running 
> the internal circuitry of the porcessor at 50 or 66 mhz. One can, however,
> pick up second harmonic by using a filter, but, it is much easier to build 
> a Phase lock loop on a silicon wafer than passive components like R, L, 
> and C.
> 

Actually, A CPU PLL normally does not pick up any harmonic component of the
input signal. In fact, the way the CPU PLL works is to compare one edge (for
example rising edge) of the input clock to the edges of the internal oscillator
circuit. In order to get 2x internal clock, the internal oscillator is divided
by 2 before the edge comparison. The frequency of the internal osc is then
adjusted such that for every input edge there is corresponding edge of the
divided internal osc (a phase-freq detector is normally used to do this).
If you need to find more information on the circuit used in the 486DX2, pick
up a copy of the latest JSSCC.
-- 
Sehat Sutardja,

sehat@iit.com				| INTEGRATED INFORMATION TECHNOLOGY
					| 
Newsgroups: sci.electronics
From: acampane@magnus.acs.ohio-state.edu (Angelo Campanella)
Subject: Re: Waveguide question
Organization: The Ohio State University
Date: Sun, 13 Dec 1992 08:08:40 GMT


Standard waveguide question!!


1/  If the outer end is open, you get a reflection in phase.  for a period of 
time equal to the elctrical length ofthe waveguide, the voltage at the other 
end is doubled.

2/ If you attach a 50 ohm resistor to that outer end, (or a resistor equal to 
the charactereistic impedance of the waveguide, the voltage hops up to the 
applied voltage and stays there.