HDTenEightyP/NetNews huggingface dataset:
From: ctlant@lims01.lerc.nasa.gov (CHRISTIAN LANT)
Newsgroups: rec.audio.high-end
Subject: Need a replacement Polk tweeter
Date: 22 Jan 1993 08:32 EST
Organization: NASA Lewis Research Center
NNTP-Posting-Host: 129.89.7.4
News-Software: VAX/VMS VNEWS 1.41    
Originator: tjk@csd4.csd.uwm.edu

Hi folks,

I've been helping a friend find an inexpensive replacement for a blown 
tweeter on one of his Polk PC-5 Junior (roughly correct) speakers (c.1988).  
He can't afford the $75 the dealer charges for the tweeter, so I thought 
there might be another source available (even used).  

The tweeter model number is SL 2000, a "Silver coil dome designed and 
manufactured by Polk Audio."  It looks like a 1" tweeter.

If anybody is familiar with this driver and has any helpful ideas we 
would be very appreciative.

BTW, one of the reasons I'm doing this, including posting on r.a.h-e, 
is that it seems like a great real-world learning experience for me.  
I've spent the last year reading alot and putting together a system that 
I'm overjoyed with - but it works "perfectly," and there is nothing on 
which I can get my hands dirty!  Hopefully, some of you can enlighten 
me on, for example, the pros/cons of a third-party replacement driver, 
and any other nuances that might relate to this endeavor.

Thanks for any advice you can give,

Chris Lant  - ctlant@lims01.lerc.nasa.gov
              NASA Lewis Research Center
              Cleveland, Ohio
From: Craig Stark <cs6h+@andrew.cmu.edu>
Newsgroups: rec.audio.high-end
Subject: Re: info on homemade interconnects
Date: Mon, 25 Jan 1993 21:37:51 -0500 (EST)
Organization: University of Wisconsin - Milwaukee
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

Quinn,

I just absconded with a 10' length of Mogami Neglex cable that my
father got from Old Colony Sound Labs and claims is quite good cable,
especially for the money (a few bucks a pair).  Neglex is 4 conductor
plus shield, so one pair of conductors is your hot, one pair your
ground (connected on both ends) and the shield remains connected at
only one end.  Apparently, it's a bit of a pain to work with, but I
can't vouch for that just yet as I haven't made up a pair yet.
I'll keep folk posted as to how the sound against my Monster IL400 and
Audioquest Topaz if people are interested.

One question I have for the board is considering grounding.  Ideally,
there would be only one ground that goes between two pieces of
equipment, thus preventing ground loops and possible hum.  However,
this doesn't seem to be done, even in the best of cables, perhaps for
a matter of convenience (since you would have to know which cables
carried a ground and which didn't).  The converse argument is, of
course, that although multiple grounds create loops, they also lower
the impedance to ground between the two pieces of gear.

The question is simply, who's right?

Craig Stark
From: Marc Dionne <dionne@SUNCIS.YCC.YALE.EDU>
Newsgroups: rec.audio.high-end
Subject: Comments on Thiel CS2's?
Date: Sun, 24 Jan 1993 20:25:39 GMT
Organization: W.A.S.T.E.
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

I have been looking at speakers lately and have found almost 
nothing acceptable in my price range. However, I have now found a
pair of Thiel CS2's used for what seems like an incredible price.
Note that these are not the new CS2 2's, but rather their
predecessor model, and are several years old to boot.

I have not yet listened to them, and would like some general
comments. My highest priority is an accurate midrange - I'm very
fussy about this, and cannot tolerate any boxiness, thinness, or
other coloration. The rest of the range of the speaker should be 
tonally very accurate, as well, but I am willing to forgive some 
slight muddiness in the bass. Soundstaging is a secondary
consideration, not nearly as important as tonal accuracy.

Are Thiel speakers generally dependable? Are they going to break 
as soon as I get them home? What kind of power is required to
drive these babies?

Thanks,
Marc
--
(bababadalgharaghtakamminarronnkonnbronntonnerronnt-
uonnthunntrovarrhounawnskawntoohoohoordenenthurnuk!)
From: ctk4739@hertz.njit.edu (Tom Kozel EE)
Newsgroups: rec.audio.high-end
Subject: Re: Two great mysteries of audio
Date: Thu, 28 Jan 1993 00:45:05 GMT
Organization: New Jersey Institute of Technology, Newark, N.J.
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

Well actually, Metal Dolby C perrecorded tapes were available several years
ago, before Telarc began their own tape production.  They were made from
Telarc's masters by Nakamichi on their high-end home decks.  These were actuallyrecorded real time (not the super high speed duplication used for all mass
market tapes produced today).  

For people without access to CDs, these are (were) the next best thing. :)

Unfortunately, Telarc started their own tape production several years ago,
and consequently no longer gives (licenses) access to the masters.

-Tom

-- 
hi there
From: peterca@ento.csiro.au
Newsgroups: rec.audio.high-end
Subject: Re:Moving Coil "Fluxbusters"
Date: Wed, 27 Jan 93 10:42:29 EST
Organization: University of Wisconsin - Milwaukee
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

>Several people have expressed the opinion that "fluxbusters" can be of
>use in improving the deteriorated sound of moving coil cartridges.
>The idea is that a magnetic flux builds up in the coil windings of
>these cartridges, adversely affecting their sound.  Periodic
>degaussing is supposed to remove this flux and restore the sound.
>I must admit to being both skeptical, and ignorant of the theoretical
>reasons why it might (or might not) work.  Seems to me it would be
>interesting to hear both theoretical and empirical points of view.

I too have been assured by people who have tried it that it works but was
sceptical.  I have an Ortofon MC3000 so I wrote to Ortofon to ask their
opinion.  I felt that as silver (the coil material for the MC3000) or
copper (what many others would have) and the body of my cartridge (ceramic)
are non-ferrous materials it was unlikely that they could become magnetised
(the implied problem).  Ortofon agreed and said demagnetisation made no
difference as there was nothing to demagnetise.  

----------------------------------------
Peter Campbell
C/O Div. Entomology, C.S.I.R.O.
Box 1700 Canberra A.C.T. 2601
Australia  (peterca@ento.csiro.au)
Ph.61-6-2464158 (w), 61-6-2516213 (h),
61-6-2464173 (fax)
----------------------------------------
From: ccw8u@poe.acc.Virginia.EDU (Carl Wuellner)
Newsgroups: rec.audio.high-end
Subject: Re: Oracle Alexandria Belt
Date: Mon, 25 Jan 1993 13:01:03 GMT
Organization: University of Virginia
Distribution: rec
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

In article <1jusfkINNl6j@uwm.edu> ezad133@hermes.chpc.utexas.edu (Jim A. Andrews) writes:
>
>Does anyone know where I can get a replacement belt for my
>Oracle Alexandria (II?) table?  My local audio shops have
>been unable to help.  I think Oracle has had numerous 
>problems in the past -- are they still in business?  Thanks . . .
>
>

Concerning a source for turntable belts, I saved the
following from the net some time ago.  While I can't
guarantee that it's accurate or still up-to-date, I thought
I'd pass it along, figuring it's worth a try:


    MCM has belts of 20.7, 23.6, 25.0, 35.1, and 38.8 inner
    circumference specifically for turntables......but if
    that doesn't do it, some of the VCR belts will fit as
    well.

    They even have a "Belt-o-Meter" for measuring the old
    one (or a piece of string in case it is deceased).

    If you don't have a current catalog, they are at
    800-543-4330.


This is not an endorsement, and I have no connection with
MCM.  I'm just passing on information others have passed on
earlier.

Carl Wuellner
ccw8u@virginia.edu
From: dbarker@spang.Camosun.BC.CA (Deryk Barker)
Newsgroups: rec.audio.high-end
Subject: Re: Great Vinyl Lists?
Date: Fri, 22 Jan 1993 22:31:27 GMT
Organization: Camosun College, Victoria B.C, Canada
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

derby@sequent.com (Dan Derby) writes:
: In the December issue of TAS, one Roger S. Gordon wrote that he had
: gone back through all the back issues of TAS and noted "every mention"
: of great records into a computer data base.  He then did the same
: thing with Stereophile and SoundsLike (?). This gave him basically a
: filter to help him buy music on vinyl that at least stood a reasonable
: chance of being good sound if not good music.

You run a real danger of confirming the prejudiced view of an
audiophile who cares nothing about music and everything about sound.
Recording quality is about the *last* consideration when I'm buying.

--
Real:  Deryk Barker, Computer Science Dept., Camosun College, Victoria B.C.
Email: (dbarker@spang.camosun.bc.ca)
Phone: +1 604 370 4452
From: ezad133@hermes.chpc.utexas.edu (Jim A. Andrews)
Newsgroups: rec.audio.high-end
Subject: KEF SPEAKERS
Date: Wed, 20 Jan 93 16:29:21 GMT
Organization: The University of Texas System - CHPC
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

Can anyone tell me what a fair price is for a pair of older KEF 104/2 speakers?
I bought them new in 1986 (no KUBE or whatever it's called), they're in great
shape, and I still have the boxes.  Any offers?

(By the way, this is my first post, so I hope I haven't messed up and gone to
the wrong group or something . . .)
From: chrz@tellabs.com (Peter Chrzanowski)
Newsgroups: rec.audio.high-end
Subject: Re: Digital Amps.. Possible?
Date: Sat, 23 Jan 1993 00:28:09 GMT
Organization: Tellabs, Inc.
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

In <1j3sb5INNskm@uwm.edu> mcarr@austin.onu.edu (Michael Carr (x1723)) writes:

> 
>	I am only a freshman in Electrical Engineering (wish me luck) so some
>of my terminology here might be incorrect. However, a friend of mine and
>I have been discussing the possibility of a digital amplifier relying on
>such a high frequency audio output that the speakers themselves behave as
>a digital to analog converter and reproduce the sound as it is supposed to
>be. Such a digital design would have the power output transistors in only
>two different states: completely on, aka no resistance and therefore no
>heat buildup, or completely off, aka full resistance (no current flow) and
>therefore still no heat buildup. Theoretically, such an amp could run at
>extremely high wattages and not worry about "melting" like analog amps...
>	I realize that I am probably mistaken in several points here, but
>I'm just interested in any ideas any of you would have on this possibility.
> 
>		Michael Carr
>		m-carr@onu.edu

Sony actually marketed a pulse-width-modulated amplifier in the U.S.A. in
the late '70s (model TA1000?).  The idea wasn't original with Sony, however,
and has been around for a long time.

The width of the high frequency pulses (the Sony's basic pulse freq.
was about 100Khz) is narrow for low-amplitude analog inputs, wide
for large inputs.  The original waveform can then be recovered by
integrating the pulses, which can be done with reasonable accuracy
using a series inductor followed by a bypass capacitor (choke input
lowpass filter).

These amplifiers are much more efficient than regular class-AB types.
The main problem is that those large-amplitude, fast risetime pulses
contain a good deal of radio frequency energy, and regulatory agencies
take a dim view of amplifiers that also function as powerful radio
transmitters.

The Sony had a box-within-a-box construction, but it still produced
noticeable noise on nearby AM radios.  This extra shielding adds
significantly to the cost of building these things; as I recall,
the Sony cost about twice as much as more conventional products
with similar capabilities.  It was very small, however (it also
used a high frequency switching power supply).

If you're interested in this stuff, you might try locating the
Sony schematics, or building something yourself.  One way to
build the pulse-width-modulator is by applying a high freq.
triangle wave to one pin of a comparator and the input signal
to the other.  Try not to generate so much radio frequency
interference that you jam essential services like air traffic
control, please.
From: youngd@Panix.Com (David Young)
Newsgroups: rec.audio.high-end
Subject: 100 to 120 Volt step up transformer
Date: Mon, 25 Jan 1993 22:34:34 GMT
Organization: PANIX Public Access Unix, NYC
  (5.65c/IDA-1.4.4 for uunet!rec-audio-high-end); Mon, 25 Jan 1993 17:34:36 -0500
NNTP-Posting-Host: 129.89.7.4
Keywords: transformer
Originator: tjk@csd4.csd.uwm.edu


	I am being relocated to Tokyo Japan. the place runs on
	different AC freq. (50 vs 60) and they run on 100V. the
	problem is US eq. (tube gear) runs on 110-120Volt range.

	do you guys now any good audio grade step up transformer
	from 100 to 120 ??? 

thanksyou

dy
From: mvcjp@cbnewsf.cb.att.com (charles.j.pouliot)
Newsgroups: rec.audio.high-end
Subject: FOR SALE: Apt/Holman Preamp (also Pioneer "Processors")
Date: Wed, 27 Jan 1993 18:08:37 GMT
Organization: AT&T
Distribution: usa
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu


Hi - I've been "redecorating" my house and I've found that I either don't use,
	or need these units.
				Thanks,
					Charlie Pouliot
					mvcjp@mvgpk.att.com
					508-960-3422 (days)
					508-373-7655 (eves)
					Haverhill, Massachusetts

*----------------------------------------------------------------------------*

"The" Apt/Holman Stereo Preamplifier   - $350 + UPS-COD Shipping Costs

	This preamp was ahead of it's time and still sonically is one of the
	best! Almost any possible switching is available, 2 tapes, 2 aux, 
	tuner, 2 phono, 2 main out, external processor loop, variable 
	attenuator instead of a volume pot, a variable mode control to control 
	the stereo imaging (in the center, normal, far right cancels mono 
	information, far left blends channels into mono - very interesting 
	feature), L/R channel assignment switches, bass, treble, balance, mute 
	button, bass contour switch, high filter switch, tone defeat, and tape 
	dubbing switches (either direction). A factory upgrade was performed a
	few years ago (I lost the receipt but have the spec sheet) and I have
	the original box and manual. I believe it's about 10 years old in
	positively mint condition.

*----------------------------------------------------------------------------*

Pioneer RG-9 Stereo Dynamics Processor
	This unit will make louds louder and softs softer. It has a variable
	control, and tape monitor jack, and a floroscope meter - a simple unit 
	that works very well with albums. It's not very useful with CD's 
	needless to say, due to their dynamic range but it restores dynamics 
	to albums and radio - works well with video-audio too.

Pioneer SR-60 Stereo Reverberation Amplifier
	This unit is a bucket-brigade type reverb/echo unit that gives a nice
	subtle (or outrageous) reverb to the sound - great for movies. It also
	has a "time tunnel" lighted display that shows the amount of delay
	according to the input signal - a conversation piece. Also with a tape
	monitor jack, switch for 3 types of delay, and a input level control.

	I have the manuals and boxes for these and am looking for $150 or the
	best offer for both, or $75 each and UPS-COD costs.

*----------------------------------------------------------------------------*
From: stette@csulb.edu (Frode Stette)
Newsgroups: rec.audio.high-end
Subject: FOR SALE: Centaur Minors, Muse 100, ...
Date: Sun, 24 Jan 1993 20:21:02 GMT
Organization: Cal State Long Beach
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

My student loan didn't come through this semester.  :-(
So, since tuition and rent won't wait, I have no choice but
to sell the only thing of value that I own - my audio system.

Please note that all asking prices are negotiable; I really
do need cash for tuition and rent. Everything is in absolutely
perfect condition - not a scratch - and I have all manuals and
original boxes. Speakers were purchased new in late 1991, the
rest in early 1992.

FOR SALE:
    Apogee Centaur Minors with matching stands  $1,170 OBO
    Muse Model 100 amplifier                      $975 OBO
    Rotel RCD-955AX CD player                     $365 OBO
    EVS passive attenuators                       $165 OBO
    Symo LS5-SX speaker cable (6ft pair)          $285 OBO
    Cardas 300-B Micro interconnect (1m pair)      $75 OBO

I can be reached as follows:
   Phone: (310) 987-4081
   Email: stette@csulb.edu

I may even be convinced to deliver in the Southern California area.
Frode.
-- 
Frode Stette
School of Business Administration
California State University, Long Beach
stette@beach.csulb.edu
From: d89marho@und.ida.liu.se (Martin V. Howard)
Newsgroups: rec.audio.high-end
Subject: Re: Two great mysteries of audio
Date: Wed, 27 Jan 1993 12:08:29 GMT
Organization: CIS Dept, University of Linkoping, Sweden
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

   In article <1jov32INN53@uwm.edu> ken@isgtec.com (Ken Newman) writes:
   >2) Why do they not "record" or "press" or "download" :) or whatever
   >   the appropriate term is, on both sides of a CD? Again, this would
   >   be more expensive, sure, but probably much less than two CD's?
   >   I certainly wouldn't mind flipping a CD over if I could save 
   >   several bucks and obtain the several other obvious advantages
   >   of this.

	   a) It would essentially be made the way a laser disc is made,
	      that is, two CD's glued together.
	   b) It would be too thick for most players, especially high-end
	      players with special transport designs.
	   c) The quality control problems would make it more expensive than
	      two CD's.
	   d) Where would you put the "label" ??

Not only this, but record companies seem to have a hard time filling
up the 70 odd minutes of music that you can cram into a CD today.
What would they put on double sided discs?  We'd probably just see 42
minute discs with 21 minutes on each side for 1.6 times the current
price of a CD, rather than (as we have today) 42 minutes of music on
one side.  I don't see any advantage.

/mvH



--
Programming isn't a science,        | Foo:    mvh@lysator.liu.se
it's an art.                        | Bar:    d89marho@und.ida.liu.se
Why is it called common sense,      | Who:    Martin V. Howard
when so few possess it ?            | Voice:  Int +46 (0)13 261 283 (GMT + 1h)
From: BARRON@RHQVM14.VNET.IBM.COM
Newsgroups: rec.audio.high-end
Subject: Patent Applications and HDCD
Date: Fri, 22 Jan 93 07:47:14 EST
Organization: University of Wisconsin - Milwaukee
Reply-To: barron@rhqvm14.VNET.IBM.COM
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

There was a posting regarding the disclosure of patent applications...

FYI...
In the United States, all pending patent applications are strictly
confidential.  If a patent is not issued, the applicant may elect to
treat the invention as a trade secret as an alternate form of
intellectual property protection.

A question I have regards when the HDCD patent applications were filed.

I am guessing that it had to be sometime after 10/91.  Applications can take
1-n years to prosecute, so it may be awhile before the information is public,
however, this does not prevent the inventor from praticing his/her invention.

Let me explain.....In the U.S. there is a one year statutory bar on
prior commercial use or sale that precludes granting of a patent.
In other words, you can't sell your invention more than a year before
filing a patent application or you're immediately out of luck.

But....once the application is filed, you can do whatever you want.
The only risk is that if the patent is not granted, your invention
becomes essentially public domain if you place the relevant
information in the public domain. (note:not very legally accurate)

Ok...the net...The issue of HDCD decoder silicon may already be in
progress with various chip houses, but....if the inventor waits until patents
are granted, they have a stronger hand in the negotiations.

This is therefore a business decision to be made by the inventor.
(I'm also pretty certain that any of these negotiations will not be
public).

Finally....Once the patent is granted, anyone making a silicon implementation
will need to make some arrangement with the patent owner or else they
become an infringer.


Note: This is a very broad and loose summary of relevant patent law.
Please see misc.legal.computing or comp.patents to pursue.
From: Peter Leone <IO20823@MAINE.MAINE.EDU>
Newsgroups: rec.audio.high-end
Subject: Type III Tape?
Date: Wednesday, 27 Jan 1993 17:15:45 EST
Organization: University of Maine System
   with BSMTP id 1179; Wed, 27 Jan 93 17:18:53 EST
 5558; Wed, 27 Jan 93 17:18:52 EST
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

Hey now! Does anybody know if there is (was) such a thing as Type III audio
tape. This was a question recently posted on rec.music.phish, I thought I might
be able to get an answer here. If anybody does know, could you please e-mail me
a response, or post it to rec.music.phish as I don't read this newsgroup on a
regular basis. Thank you for your help!

                                   Peace,
                                         Peter Leone
:IO20823@MAINE.MAINE.EDU                      TRUCKIN' UP TO BUFFALO..... :
:T. PETER LEONE                                GO SABRES!!                :
:BUFFALO BILLS AFC CHAMPS 3RD YEAR IN A ROW!!  GO BANDITS 1992 MILL CHAMPS:
|            "GOD DAMN WELL I DECLARE HAVE YOU SEEN THE LIKE........."    |
From: cal@gsbux1.uchicago.edu (Cal Lott)
Newsgroups: rec.audio.high-end
Subject: Re: What about Amplifiers?
Date: Sat, 23 Jan 1993 00:53:54 GMT
Organization: University of Chicago Computing Organizations
NNTP-Posting-Host: 129.89.7.4
Return-Path: <news@wakinyan.uchicago.edu>
Originator: tjk@csd4.csd.uwm.edu

LEON@biosci.arizona.edu writes:


>I currently have a receiver with line-level outputs for a center speaker.
>The main speakers on the receiver are at a houndred (100) watts each and
>I would like to obtain an amplifier with about the same amount of power
>for a center speaker.  What should I consider when looking at amplifiers,
>I once heard that overall they are basicly the same. Can someone out
>there please comment on this and recommend some amplifiers.

	Well, Vince, I doubt that you'd find many people agreeing that all
amps sound the same. Perhaps all the amps that your friend has listened to
sound about the same, but it would be mistake to extrapolate that opinion
to amps in general.

	Is the center speaker going to be used in some sort of surround
setup? In that case, you might also have outputs for a subwoofer or a
surround channel in addition to the center speaker. You might profit the
most in the long run from buying a stereo amplifier. Use one channel for
the center speaker and the other for another surround or subwoofer output.

	In any case, you may find it difficult to find a good, inexpensive
mono amp. (Perhaps somebody else may know of one and will comment.) There
are several models of decent stereo amps for under $400-$500 dollars that
should perform quite nicely, and will may sound better than your receiver!

	In fact, your money may be better invested in improving your
simple stereo reproduction before adding additional channels. It is an
idea worth considering.

	You will want an amp with adjustable gain controls, so that you
can match levels with the left and right channels. For this reason, I
would suggest the Parasound HCA-800, a 100wpc amp with adjustable gain
controls that lists for $425.

						Good luck,

						-Cal
--
----------------------------------------------------------------------
Cal Lott          "Oh, I see-- I thought 'no' meant 'spoon'!" --Dan
Email me, baby!   cal@gsbux1.uchicago.edu   cjl1@midway.uchicago.edu
----------------------------------------------------------------------