HDTenEightyP/NetNews huggingface dataset:
From: rcheek@uceng.uc.edu (Rob Cheek)
Subject: WANTED: Delco AM/FM Cassette
Keywords: wanted, GM, Delco
Organization: University of Cincinnati
Date: Tue, 29 Dec 1992 01:08:12 GMT

I'm looking for a circa 1984 Delco AM/FM stereo cassette player, the
kind General Motors puts in most of its cars. You know, the big rectangular
thing? Anyway, I currently have the AM/FM  unit, and would like to keep
the interior stock. Recently, however, I bought a portable Discman and need
a way to play it through the car stereo system.

It came with the tape adapter, so that's not a problem. I looked into
a FM transmitter that hooked to the headphone jack, but to no avail. So,
I'm requesting the help of anyone out there who has recently yanked their
unit for a better one. I'll pay any shipping, and a small price on top of
that, if desired. I can pick up anything in the western part of Ohio, as
well.

Please respond via email to rcheek@uceng.uc.edu or rcheek@ddt.occ.uc.edu

Thanks,
Robert Cheek
-- 
Robert Cheek - rcheek@uceng.uc.edu
From: kz08+@andrew.cmu.edu (Ken Zuroski)
Newsgroups: rec.audio
Subject: Re: questions on new digital formats
Date: 30 Dec 92 16:29:40 GMT
	<1992Dec24.184453.11969@dgbt.doc.ca>
	<BzwJ97.HKK@cs.columbia.edu> <1992Dec29.204744.7518@adobe.com>
Organization: Doctoral student, English, Carnegie Mellon, Pittsburgh, PA

Speaking of the new digital formats, I've yet to see either DCC or MD
pre-recorded media for sale in music shops. My questions: how are they
gonna package these things? I assume the DCC can fit into the old analog
cassette containers, but what about the MD diskettes? With all the fuss
from the record stores about CD packaging, I'm interested in what the
record companies have planned for the new formats. 

ken

---
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Ken Zuroski
Department of English
Carnegie Mellon University
Pittsburgh, PA 15213 USA
kz08@cmu.edu
~~~~~~~~~~~~~~~~~~~~~~~~~~~
Newsgroups: rec.audio
From: yount@fox.ece.cmu.edu (Charles Robert Yount)
Subject: Needed: adjustment specs for Yamaha CD player
Organization: Electrical and Computer Engineering, Carnegie Mellon
Distribution: rec
Date: Tue, 22 Dec 1992 15:09:47 GMT

Hi,

I need the electrical adjustment specs for a Yamaha CD-26.  If you
have access to them, please email me; I'll pay for photocopying,
postage, time, etc.

Chuck
Newsgroups: rec.audio
From: elmquist@pez.ssesco.com (Chris Elmquist)
Subject: Re: Velodyne ULD-12 hums - why, and can it be fixed?
Organization: SSESCO
Date: Wed, 30 Dec 1992 21:41:09 GMT

In article <1992Dec29.203034.9337@news.ysu.edu> lou@yfn.ysu.edu (Lou Anschuetz) writes:
>Mike Benna (Mike_Benna@mindlink.bc.ca) wrote:
>: > Cal Lott writes:
>: >
>: >         Is the sound coming from the woofer itself? If so, it is
>: > possible that the active servo circuit of the Velodyne thinks that it
>: > is receiving an input signal.
>
>: Yes, it is. From what you say it sounds like this is an abnormal "feature"
>: and I should get it repaired.
>Curious :-)  I have a Velodyne F1000, and it too hums (softly)
>when all else is off and/or disconnected.  I think I've convinced
>myself that it is the servo motor - which normally you would never
>hear during actual sound production.  BTW, hearing this requires
[ deletions ]

Could this be the transformer in the power supply ?  The plates are sometimes
loose and can vibrate when 60 Hz is applied...   Just a thought...



--
Chris Elmquist, N0JCF
elmquist@SSESCO.com
73267.2711@Compuserve.com
(612)342-0003@work (8am-5pm CST6CDT)
Newsgroups: rec.audio
From: gmw1@cunixa.cc.columbia.edu (Gabe M Wiener)
Subject: Re: questions on new digital formats
Reply-To: gmw1@cunixa.cc.columbia.edu (Gabe M Wiener)
Organization: Columbia University
Date: Fri, 25 Dec 1992 06:09:50 GMT

In article <1992Dec23.234533.16495@adobe.com> caro@adobe.UUCP  (Perry A. Caro) writes:
>
>Correction.  No *current* DCC decks support ACC recording, but there
>is nothing in the technology or specification for DCC that prevents
>analog recording in the same deck.  At least, that's what magazine
>articles in Audio and Stereo Review said.

At the recent New York City SPARS meeting, the presentation was by
BASF and was about DCC manufacture, and the word I heard that the 
lack of record ability for analog is part of the Philips license 
agreement.  They obviously want to push the old analog cassettes
into the grave as fast as possible.

>Why don't these early DCC decks do ACC recording?  I dunno.  All I know
>is that the next generation of home decks will probably include ACC
>recording, as a high end feature, no doubt. :-)

Not likely.

>While I'm at it, I can't sympathize with all the *a priori* angst about
>PASC encoding.  So it loses data?  So what?  So does every analog
>recording I've ever made!  I'll believe people can hear a difference
>when someone, anyone, can do a double-blind A/B/X test and beat 50/50
>chance.

Well, you'll hear the difference if the system is revealing enough.
DCC and other formats of that ilk have no application in the pro world
anyway.  I wholeheartedly support them as a replacement for the
cassette however (NOT for the CD though, and I'm glad no one is
marketing it that way).

>We'll see who wins.  My bet's on backwards compatability.  

My bet is that the consumer market will not grasp the backward
compatibility issue.  They'll think that the new decks can record
regular cassettes and they won't care about the digital ones because
their friends can't play them.  The CD didn't sell because of its
sound quality.  The CD sold because it looked different and because it
was more convenient than the LP.

We could very well see both DCC and MD die on the vine a la quad.


--
Gabe Wiener - Columbia Univ.     "This 'telephone' has too many shortcomings 
gmw1@cunixa.cc.columbia.edu       to be seriously considered as a means of 
N2GPZ in ham radio circles        communication. The device is inherently of
72355,1226 on CI$                 no value to us." -Western Union memo, 1877
From: kosmatoo@JSP.UMontreal.CA (Kosmatos Odisseas)
Newsgroups: rec.audio
Subject: Re: DCC vs MD compression schemes?
Date: 27 Dec 92 01:28:52 GMT
Organization: Universite de Montreal

In article <1hikcmINNls0@life.ai.mit.edu> gts@gnu.ai.mit.edu writes:
>a friend of mine and i were just wondering:
>
>is the lossy compression scheme on DAT the same as that found on MD?

You mean DCC. (DAT does not use compression)

>
>one answer we found was 'of course not, that would make sense.' 
>does anyone have a more authoritative answer, i.e., perhaps seen some
>of the specs or whatever?

DCC and MD have different compression schemes.

>
>and i DO like the idea of an MD-based answering machine...

yes, interesting. But it sounds expensive to me.

>--
>Greg Samson / Dr. Evil Microwizard (gts@gnu.ai.mit.edu)


-- 
___                                ___               ,   ^             ,
=*=        Odisseas Kosmatos       =*=  "Cul bien vide, tete plein d'idees."
=*=    kosmatoo@jsp.umontreal.ca   =*=
=*= shammer@mafalda.math.mcgill.ca =*=
From: msiegall@OAVAX.CSUCHICO.EDU (MARC SIEGALL)
Newsgroups: rec.audio
Subject: Re: 'Bookshelf' Speakers???
Date: 21 Dec 92 22:51:26 GMT
Reply-To: msiegall@OAVAX.CSUCHICO.EDU
Organization: California State University, Chico
NNTP-Posting-Host: oavax.csuchico.edu

In article <perry-211292155452@bperry.gsfc.nasa.gov>, perry@lheavx.gsfc.nasa.gov (Brendan Perry) writes:
>I'm in the market for a pair of so called 'Bookshelf' speakers in the $200
>to use as my secondaries. I have a 33 WPC Denon DRA-300 I bought in 1984
[stuff deleted]

See if you can listen to some Paradigm Titans.  I'm about to get a pair
myself, after listening to various models of Boston Acoustics, Yamaha,
and (some others I don't remember).  BIC's Venturi 62s also sounded
pretty good.  Both models retail for $199.  The Paradigms sounded as good
as some other manufacturers' $300 speakers of the same size.
******************************************************************************
Marc Siegall                     MSIEGALL@OAVAX.CSUCHICO.EDU
Department of Management
California State University      (916) 898-5421
Chico, CA 95929-0031
******************************************************************************
Newsgroups: rec.audio
From: evan@top.cis.syr.edu (Evan Cheng)
Subject: re: Is an expensive CD player worth the money?
Organization: Syracuse University, CIS Dept.
Distribution: usa
Date: Thu, 24 Dec 92 00:56:19 EST

I hate getting in this kind of argument, especially when I am leaving
for my vacation tomorrow. But I can't take it anymore, I just have to
say something.

Claude,

True. If I have 8 thousand dollars on a stereo system, I wouldn't give
a NAD CD player any kind of consideration. But that doesn't mean I think
NAD cannot make a CD player. And it sure wouldn't prompt me to think
that NAD cannot possible make anything decent.

Ok. A NAD CD player does not compare favorably against a Cal player. But
think about this: a top-of-the-line NAD 5000 is listed $500 while a
entry-level Cal is listed $850 (if my memory serve me correctly.) Have
you compared the NAD player to the other players in the price category?
Or maybe you think all CD player that does not measure up against your
Cal player is a piece of junk regardless of its price?

If I would follow your logic, I can probably declare Spica TC-50 is a
piece of junk because its performance is far from that of Thiel CS1.2.
And Spica is lucky that they do not make any other stereo products 
otherwise I can probably declare that they are all worthless, too.

Don't forget, an expensive stereo system is very unforgiving. You don't
insert a PSB Alpha into a 10k reference system to see if it performs
well. Nobody does that. People who buys a NAD player are probably those
who are thinking about building a 1k to 2k system. (Perhaps a student?)

Even if you still think that the NAD player is a bad news, don't declare
their other products dead. Just about every audio company out there had
made something less than perfect sometime along the line. But most of
them still have good products (otherwise they won't be in business.)

Well, this is all I have to say. I am sure this post will induce a
couple of flames. Thank goodness I won't be here to read them.

Evan Cheng
evan@top.cis.syr.edu
Newsgroups: rec.audio
From: sbradley@scic.intel.com (Seth "Gimpy" Bradley)
Subject: Sumo Discounter Sought
Organization: Intel SCIC, Beaverton, OR
Distribution: usa
Date: Fri, 1 Jan 1993 21:53:04 GMT

Subject pretty much says it.  I'm looking for a dealer that discounts
Sumo products.  Any leads would be appreciated.
-- 
Seth J. Bradley, Senior System Administrator, Intel SCIC
Internet: sbradley@scic.intel.com   UUCP: uunet!scic.intel.com!sbradley
----------------------------------------
"A system admin's life is a sorry one.  The only advantage he has over
Emergency Room doctors is that malpractice suits are rare.  On the other
hand, ER doctors never have to deal with patients installing new versions
of their own innards!"  -Michael O'Brien
From: kirk@hpcc01.corp.hp.com (Kirk Lindstrom)
Date: Tue, 22 Dec 1992 16:21:49 GMT
Subject: Re: quiet current sources.  Any ideas?
Organization: Shredding the water of SF Bay, HP-OCD
Newsgroups: rec.audio

>I need to modify an input buffer for lower noise.
>
>Can anyone suggest a method for making a _quiet_
>15-ish mA constant current source?  The olde zener-
>bipolar solution is proving noisy.
>
>gfl@hera.cc.bellcore.com
>Grant
----------

My favorite current source is:

        V+
       ---
        |
        |

        R1                         Q1 & Q2 are NPN (and matched)
                    Iout           
        |            |             ICq1= [(V+)-(V-)-0.7]/(R2+R1)
        +---+        |Vy
        |   |        |             As long as you make 
         \| | Vx   |/              ICq1*R2 and Iout*R3 > 200mv or so,
        Q1|-+------| Q2            Then 
         /|        |\/                  Iout ~ = R2/R3 * ICq1
        |            |
                                   Let R2=R3 and ICq1 then equals Iout
        R2           R3            (as long as Q1 and Q2 are reasonably
                                    well matched)
        |            |
      -------------------
             V-

Say you use V+=12V and V-=0V.  
The compliance voltage of the current source is roughly Vx, but add 0.5 Volt
for headroom for Vy.  Lets say Vy can go to 2 Volts.  Then Vx = 1.5 V meaning 
V|r3~0.8 Volts   0.8/.015= 53 Ohms = R3  (use std 51 Ohm resistor)
Use 51 ohms for R2 and R1 is  
         [(V+)-(Vx)]/ICq1 = [12V-1.5V]/0.015A = 700 Ohms = R1

There are hundreds of variations on this current source, some can be
independent of bias and temperature (but use more parts).  Let me know
if you need any references.

Kirk out


Newsgroups: rec.audio
From: moskowit@panix.com (Len Moskowitz)
Subject: Re: 'Bookshelf' Speakers???
Date: Tue, 22 Dec 1992 13:57:19 GMT
Organization: PANIX Public Access Unix & Internet, NYC

Brendan Perry writes:

>I'm in the market for a pair of so called 'Bookshelf' speakers in the $200
>to use as my secondaries. ...  Any suggestions?

PSB Alpha and Celestion 3.


-- 
Len Moskowitz
moskowit@panix.com
Newsgroups: rec.audio,rec.music.misc,rec.music.cd
From: guru@camelot.bradley.edu (Jerry Whelan)
Subject: Dolby Surround CDs
Organization: The Smelly Ditch
Date: Thu, 31 Dec 92 01:43:14 GMT

	I've seen this question come up thousands of times (well, maybe
like 4 or 5) before.  But the answer always seems to be `go look in
x magazine, they had a recent article.'  But I don't have reasonable
access to x magazine.  So I'm asking if there is someone out there
with a computerized list of dolby surround encoded CDs and if so,
would you please post it?

-------------------------------------------------------------------------------
``written by a drunken insane pathological liar''        guru@stasi.bradley.edu
Newsgroups: rec.audio
From: ghost@netcom.com (Jay Adelson)
Subject: Re: Paradigm
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 
Date: Sat, 26 Dec 1992 21:06:20 GMT

jcm11@po.CWRU.Edu (John C. Mackey) writes:

>I've been looking around recently for a center channel speaker for my
>ProLogic Surround receiver. 
[stuff deleted]
>Anyway, I've received a number of suggestions from people here on the
>system, and one person recommended a pair of Paradigm Titans, which aren't
>shielded.  After calling around town (here in Columbus, Ohio), I learned
>that Paradigm is releasing a true center speaker within the next week or
>so.  Now, I'm not much of an audiophile, and to be quite honest, I had never
>heard of Paradigm until a few days ago.  
>The salesman seems to think the Paradigm would be the way to go, and
>that isn't even the store's most expensive speaker.
>Does Paradigm generally produce a good product?  Any idea how they might
>sound in a system with a pair of mid-end Bose speakers (301 III's)?

Well I can only speak from experience. My Paradigm 5se's are absolutely
the best speakers I've ever owned, though the 7se's get great bass
response.  I also am looking for a shielded center speaker, in fact, I have
been looking for one four about a year now.  Nothing seems to match the
Paradigms I own properly.  I hadn't heard about this new speaker they are
releasing, but I must tell you, I'm ECSTATIC!  I can't say how well it
would mach the Bose speakers, but I'd be willing to lay money on it sounding
great.  Paradigm is a (from what I've heard) speaker company out of Canada
that got it's start through some university's research on acoustics and such
(or something like that)..and everything I've heard through these speakers
sounds remarkably accurate and pleasant.  My only gripe has been imaging
in comparison to Celestions, but otherwise they are very good.

Please post when you know more about this center speaker!

-Jay Adelson (ghost@netcom.com)

>-John
>-- 
>John C. Mackey  -  Music Composition major at Cleveland Institute O' Music
>-----------------

-- 
[ Jay Steven Adelson      |  Internet: ghost@netcom.com            ]
[ 340 Channing Way, #251  |  ------------------------------------- ] 
[ San Rafael, CA.  94903  |  Amnesty International: 1-800-552-6637 ]
Newsgroups: rec.audio
From: stana@demetrius.corp.sgi.com (Stanley Anderson)
Subject: Polk RM3000 speakers
Organization: Silicon Graphics, Inc.
Date: Tue, 29 Dec 1992 23:46:46 GMT

Does anyone have any information on this speaker system which consists
of two satellite speakers and a subwoofer.  It seems to have been well 
regarded by some people in the industry since Polk advertises that this 
system has won the Audio/Video Grand Prix award twice.

I'm thinking about using a pair of the satellites (minus the sub) as the
rear channel in my home surround sound system.  I have a pair of Polk 
Audio SDA 1C's as the front mains.  I just bought a Polk CS100 for the
center channel. Do you think the subwoofer is necessary to round out the
sound for the system even though the speakers are relegated to rear channel
status? BTW, I'm using a Lexicon CP-1 as my processor with Adcom amps
driving the center and rear channels (60W per).

Thanks in advance for your feedback.  E-mail or post.

-- 
   ----------------------------------------------------------------
   stana@corp.sgi.com    Stanley Anderson     Phone  (415) 390-5867
   Silicon Graphics   Channel Marketing, NAFO   Fax  (415) 390-6108
   2011 N.Shoreline Blvd.,  Mountain View,  California, USA   94043
   ----------------------------------------------------------------

Newsgroups: rec.audio
From: phr@telebit.com (Paul Rubin)
Subject: Re: Analog CDs (was: CD Sound Quality)
Organization: Telebit Corporation; Sunnyvale, CA, USA
	<BzoKMn.4oB@ssesco.com> <1992Dec24.180134.9008@tc.fluke.COM>
Date: 25 Dec 92 15:30:15

    You're too pessimistic.  Analog recording on a 12cm disc could hold as
    much as 26 hours of CX encoded sound.  

Something like this would probably send record company executives
through the roof, especially if it were consumer recordable.  :-(

From: tomb@hplsla.hp.com (Tom Bruhns)
Date: Thu, 24 Dec 1992 16:16:27 GMT
Subject: Re: Mr. Pierce responds to Re: Class C amplifiers, says Mr. Pierce.
Organization: HP Lake Stevens, WA
Newsgroups: rec.audio

henry@monod.biol.mcgill.ca (Henry A. Pasternack) writes:

>   The term "Class C" always suggests to me a circuit in which the
>device conduction angle is significantly less than 180 degrees.  I
>automatically think of CW transmitters when I hear the term.  Such
>an amplifier is wholly unsuited to linear operation, whether at
>audio frequencies, or at RF, as in an AM transmitter output stage.

Yep, class C is generally biased well below cutoff...

They are used commonly for FM transmitters, and as limiters in
FM receivers as well.  

But also... there was an article in "RF Design" magazine, perhaps two
years ago now, that described a technique for generating an AM
radio signal using two class C amplifiers fed with, basically,
FM modulation from audio signals that were derived from the input
audio signal in a very special way.  The advantages for a 50kW or
larger transmitter should be obvious.  You can afford to spend quite
a bit on getting the right audio signals when you save 10% or more
on that kind of power bill.  Dunno if anyone is producing the thing
commercially yet.  (Or if it was perhaps even incorrect or a hoax; I 
didn't go through the math, since building AM transmitters isn't in
my plans these days.)
From: tom@afthree.as.arizona.edu (Thomas J. Trebisky)
Newsgroups: rec.audio
Subject: Re: Subwoofer amplification
Date: 22 Dec 92 00:58:05 GMT
Organization: University of Arizona, Tucson, AZ

In article <1992Dec21.125142.1@tnclus.tele.nokia.fi> lauusitalo@tnclus.tele.nokia.fi writes:
>In article <1992Dec21.111548.1@tnclus.tele.nokia.fi>, lauusitalo@tnclus.tele.nokia.fi writes:
>> You do need an LP filter. You should use active filter before amp. This
>> filter sums both channels. For 12" element you need about 100 litre
>> box. 
>> 
>> And as said before that supply needs reconsideration. For full swing
>> you need about +-24V supply with enough current capacity.
>> 
>
>Few things more. If you are using car amp or some other amp that has
>switching power supply, then you can use that 12V but you would need
>much more current than 2.5A. At least 15A. You can get clue from fuses
>in the amp.

This is probably obvious to many, but when building a power amp and
designing the power supply, there is an intimate relationship between
the voltage levels and the current it can deliver into the load.

For example (as a first cut, just think DC and view the speaker as a
resistive load).  Put 12V across 8 ohms and the max current flow is
12/8 = 1.5A.  It doesn`t matter if the supply can deliver 100A, only
1.5A is going to flow into that load no matter what you do given 12V.
So, you need to scale up the supply voltages.  Get a split +-36 volt
supply and you can start getting currents up to 4A or so and push
towards 80 or 90 Watts RMS into 8 ohms.  Get a split +-50 volt job
and you can get into the 125 Watt area.  Get +- 85 volts and you can
get into the 500Watt per channel arena.
--
	Tom Trebisky	ttrebisky@as.arizona.edu
"Did you know that 500,000 trees are consumed in America each week
to produce our Sunday newspapers.  Never mind recycling, why even
take the paper?"
From: moskowit@panix.com (Len Moskowitz)
Newsgroups: rec.audio
Subject: Re: Horn Design Help Needed!
Date: 29 Dec 92 22:57:59 GMT
Organization: PANIX Public Access Unix & Internet, NYC

In article <demaine.725617617@ee.ualberta.ca> demaine@ee.ualberta.ca
(Cal Demaine) writes:

>For reasons of no interest to anyone including myself, I've been wondering
>how to design accoustic horns for conventional drivers of any type.
>
>If anyone has knowledge in this area, or can recommend a source or reference,
>please let me know.  I'm open to Email, but responding on Rec.Audio gives all
>those lurkers a chance...

There have been a handful of articles in Speaker Builder magazine over
the last few years about designing horns.  They're in Peterborough, NH
(603-924-9464).

-- 
Len Moskowitz
moskowit@panix.com
Newsgroups: rec.audio
From: strong@tc.fluke.COM (Norm Strong)
Subject: Re: Analog CDs (was: CD Sound Quality)
Organization: John Fluke Mfg. Co., Inc., Everett, WA
Date: Thu, 24 Dec 1992 18:01:34 GMT

In article <BzoKMn.4oB@ssesco.com> nau@ssesco.com (William Nau) writes:
}Bob Myers writes:
}> Yes, that IS what LDs are; now why do you think this would be better than
}> any existing format?  The bandwidth?  They're certainly not very convenient
}> (too big), nor are they as durable as CDs (given the analog nature of the
}> signal, they're not nearly as forgiving of defects as the error-corrected
}> digital CD format).
}
}I believe he ment to indicate that the method used to record 1 hour of video
}on a LD could be condensed to a much smaller (5") disk for 75 minutes of
}audio.  This would give you an analogue recording with the convience of
}a CD.  I find the idea interesting and would be interested in the audio
}quality.

You're too pessimistic.  Analog recording on a 12cm disc could hold as
much as 26 hours of CX encoded sound.  

-- 

Norm Strong  (strong@tc.fluke.com)
2528 31st S.   Seattle WA 98144   USA