HDTenEightyP/NetNews huggingface dataset:
From: <MPA15C!ARTHUR@TRENGA.tredydev.unisys.com>
Newsgroups: rec.audio.high-end
Subject: Well Tempered Turntable
Date: 29 DEC 92 12:24
Organization: University of Wisconsin - Milwaukee
NNTP-Posting-Host: 129.89.7.4
Comments: Automatic Return Receipt Requested
Originator: tjk@csd4.csd.uwm.edu

I picked up a WTT Classic of about four years' vintage last night, thanks to
Audiomart.  Looks like a nice unit, complete with the VanDenHul silver wire
upgrade.  (What's that alleged to do?).  Alas, the seller couldn't find the
manual, although he's promised to tear the house apart.  I suspect a number
of you could answer several questions:

a).  There appear to be three adjustments on the arm- a rotating weight in the
     center of a threaded rod on top, and a couple turnable knobs.  They
     all can't be antiskating adjustments, and I don't think this has adjustable
     VTA, so what gives?

b).  I currently use a VPI isolation platform under the turntable.  Would that
     be recommended for the WTT?  Obviously that separate motor is a different
     design philosophy from most competitors, so I'm not intuitively sure
     whether having them together on the sprung isolation platform is an
     advantage in this case.

c).  He threw in a Monster Alpha Genesis 1000 cartridge, always Stylasted and
     with only about 300 hours on it.  What's the scuttlebutt on this guy?  I
     currently use a Talisman S, getting up in hours, and had envisioned
     purchasing a Blue Point Special.  With my limited LP use these days
     (despite the better sound than my EAD Ultra Rotel), it's hard to justify
     a Clavis!  Anyway, how would the conventional wisdom rank those three
     cartridges?

d).  I don't recall ever seeing a WTT with a dust cover.  Does it exist?
     Otherwise I'll build one out of plexiglass, just as I did for my Nitty
     Gritty.  I have one cat who loves to sit on turntables, despite my
     pleadings.

Any miscellaneous thoughts on the WTT would be gratefully accepted.
                                                                               ]

  Arthur L. Shapiro        ARTHUR%MPA15C@TRENGA.TREDYDEV.UNISYS.COM
  Software Engineering
  Unisys Corporation       Speaking as a civilian, rather than for
  Mission Viejo, CA        Unisys, unless this box is checked: [ ]
From: matthews@eecs.ucdavis.edu (Thomas W. Matthews)
Newsgroups: rec.audio.high-end
Subject: Re: CD tweaks
Date: 22 Dec 92 23:06:04 GMT
Organization: Division of Electrical Engineering and Computer Science, UC Davis
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu


For those following the  work of  peterca@ento.csiro.au in message
 <1h4i1bINN8vl@uwm.edu>, here are some quotes with my comments:

>follows:  Current output DACs like the TDA1541A don't like to see a voltage
>on their output and ideally would like to see a very low impedance to
>ground.

The current output of a DAC has a low output conductance ( dI/dV ).
Hence its output current changes only a little if the output voltage
changes.  It is true that an absolutely constant output voltage
would eliminate some error, but it would be very, very slight.

>for current to voltage conversion.)  I then wondered what impedance opamp
>I/V converters present to DACs in usual applications and was told by a
>friend that it is generally 50ohms to several kiloohms.  [however I have
>also been told an opamp set up for I/V conversion presents a virtual earth
>to the DAC as its output fedback works to keep its inverting input (DAC
>connection) at earth potential -so I'm not sure which is correct] These

It is true that for the op-amp circuit commonly used for I/V conversion
the input impedance is reduced by the loop gain and is "small".  However
the loop gain (the open-loop gain divided by the closed loop gain) is a
function of frequency, reducing as frequency increases.  Hence the input
impedance of the I/V converter increases with frequency.  To guess at the
effectiveness of the op-amp at keeping its input voltage constant, I would 
look at the settling time.  Looking at the AD data book, let's say that the
AD 827 settles in 120 ns.  When the output settles to the voltage it should
have, the input has settled to the voltage it should have (which is the
voltage commensurate with the very low input impedance due to feedback).
120 ns is about 1/5000 of a sample time at 44.1 k samples/sec, so I
would say that the AD 827 should do a very good job of keeping the
DAC's output voltage constant all by itself.  The resistor and capacitor
across the output of the DAC do lower the impedance seen by the DAC
output, but they simultaneously degrade the op-amps abiltiy to present
a low impedance to the DAC.  The presence of these parts also raises the
noise gain of the op-amp but my quick calculations confirm that the 27
Ohm resistor is not so low as to hurt the SNR, even though it raises
the noise gain from 1 to 37 (assuming Rf  = 1K).

You might want to try the AD 827 with/without the extra impedances across
the DAC output (I can't tell if you tried this yet).  The differences
you notice may not be due to changes in the DAC's output voltage.

Tom Matthews
From: ereiss@ocf.berkeley.edu (Edward Reiss)
Newsgroups: rec.audio.high-end
Subject: Complete system for $7.5K
Date: 28 Dec 1992 09:26:53 GMT
Organization: U.C. Berkeley Open Computing Facility
Distribution: world
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

This request is (unfortunately) not for myself, but for a friend.
He wants to build a complete system for $7.5K +- $1K.  The system 
is to consist of: Amp, Preamp, Speakers, CD Player (or D/A & Transport),
and a moderately priced Tuner. He'd rather not spend a mint on interconnects.

So far, speakers under consideration:

Mirage M3-si
Vandersteen 3's
Vandersteen 2CE
Snell Type C:/IV
Thiel CS2.2
PSB Stratus Gold

Amps and Preamps:

So far, Brystons and VTL - but need suggestions

Ditto regarding CD components.

Ditto regarding interconnects.


I'll post a summary of responses to the newsgroup.  (To all of you kind
enough to reply, please let me know if I can post your email response in
the summary).

Thanks,

Ed Reiss
From: barothwe@floyd.cca.cr.rockwell.com
Newsgroups: rec.audio.high-end
Subject: Tax DEDUCTIONS for 1992 MIDI Donations
Date: 16 Dec 92 14:51:48 GMT
Organization: University of Wisconsin - Milwaukee
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu



		------======<<<<<<(((((     )))))>>>>>>======------

		   You can get TAX DEDUCTIONS on MIDI/Audio Gear
		        if you donate by the end of 1992

		------======<<<<<<(((((     )))))>>>>>>======------

		     Got MIDI/Audio Gear you don't use anymore?

		------======<<<<<<(((((     )))))>>>>>>======------

		Got enough money that you can afford to be generous
		    with that which others can put to good use?

		------======<<<<<<(((((     )))))>>>>>>======------


        I am co-chairman of the "PTF Education Committee" (PTF is
Parent-Teacher-Fellowship) for a private, non-profit, Christian elementary/
middle school in Cedar Rapids, Iowa. We have two known-to-be-working Apples
and one IBM PC. We also have an Apple that I have not looked at yet. The
school's name is Isaac Newton Christian Academy. Money is tight, and
the roof needs repair, so usually fund raising tends to be directed towards
things other than computers. :-(

        We are, right now, working on establishing a "Computer Lab", which
will include at least 1 of the systems set up for MIDI applications, and have
been talking about soliciting donations.

	We ask that if you have ANY Apple II or MS-DOS MIDI/Audio items, that
you would SERIOUSLY consider donating these to our school. Even if it is an 
item that needs repair, we'd be happy to accept it IF we know the repair costs
involved before it is shipped to us. We currently have one Yamaha (forget the
model) basic full-size, 61 key, 4-voice piano that has MIDI in/out/thru.

	Even though we will appreciate any donation, here are some specific
	things we are looking for at this time:

		o  MIDI Capable Full-Size Keyboards
		o  MIDI cards
		o  Music Education software such as Ear training, music
		    reading, music theory, keyboard skills, etc.
		o  Sequencing software
		o  Sound modules or cards (perhaps someone is sick of
		    their MT-32?)
		o  Amplifier/Speakers for Audio monitoring
		o  Programmable Drum machines with built-in sounds

	REMEMBER... this is a BONA FIDE non-profit organization!

Thank you for your consideration and support,

Bruce Rothwell

===============================================================================
  Bruce Rothwell                            \ /~~~~~~\     Opinions expressed
  barothwe@floyd.cca.cr.rockwell.com         X        )    are mine, but they
  Rockwell Int'l - CCA                      / \______/     might be shared by
  Cedar Rapids, IA                                              multitudes !!
===============================================================================
From: ole!ray@uunet.UU.NET (Ray Berry)
Newsgroups: rec.audio.high-end
Subject: FOR SALE: 50 w/ch tube power amp
Date: Tue, 22 Dec 1992 07:06:42 GMT
Organization: Cascade Design Automation, Bellevue, WA
Distribution: na
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu


   FOR SALE:

    Eico HF-89 Power amplifier.  50 watts RMS/channel.
    This amp weighs in at 42 lbs.  The dark gray chassis is dominated by
    three transformers (power xfmr & 2 output xfrmrs).  It's had very light
    use over the last 10-15 years.  Tube complement: 2 6SN7GTB, 1 12AX7,
    4 6CA7/EL34 (outputs, 2/ch).

  OK, Eico is not a name that traditionally invokes reverence, but this is
  an honest basic tube power amp for devotees of that persuasion.

  Asking price is $400, FOB Detroit.  All offers considered.
-- 
Ray Berry kb7ht ray@ole.cdac.com 73407.3152@compuserve.com /*inquire within*/
From: markt@cup.hp.com (Mark Thompson)
Newsgroups: rec.audio.high-end
Subject: Re: Dynakit 70 Tube Amp
Date: Fri, 18 Dec 1992 17:48:37 GMT
Organization: Hewlett-Packard
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

One other way to get around the 7199 availability problem is to convert
the st70 to 6an8, the type used in mk3s.  I'm not sure what is required
but it isn't too hard, maybe someone will pull out their tube manual and
give us a hint.  The 6an8 is still available for reasonable prices, i saw
that RUBY tubes sells them for about $8 each.

Just a little more input.

Mark
From: owen@emds.enet.dec.com (Steve Owen)
Newsgroups: rec.audio.high-end
Subject: ADCOM GCD-600 5-Disc CD changer
Date: Mon, 28 Dec 1992 19:28:27 GMT
Organization: Digital Equipment Corp.
NNTP-Posting-Host: 129.89.7.4
Organisation: Digital Equipment Corporation, Maynard MA
Originator: tjk@csd4.csd.uwm.edu


Santa was very good to me this year... he (she) left behind an Adcom GCD-600 
5-Disc CD changer!

Features
-5 CD carousel changer with access to 4 discs while the 5th is playing
-Random play.
-Outputs include fixed output, variable output, and digital (coax) output.
-All 3 outputs can be used at the same time.
-Remote can control all front panel functions including drawer opening, and 
includes volume control.
-Volume control has 50 discrete steps of ~1.5db each (steps numbered from -50 
to 0).
-3" CD capability
-user selectable polarity inversion

So far, I absolutely love the thing... sounds GREAT.  MUCH better than the 
bottom-of-the-line Sony I've had for the last 4 years or so. 

A couple of (minor) problems I have with it:
	-The drawer seems a bit flimsy.  It sticks out quite far so as to be 
	 able to access 4 of the 5 discs.  I'm afraid that if I accidentally 
	 bump it hard with the drawer open, I'll break it.

	-Since the CD player is at the bottom of my rack (about 10" from the 
	 floor), if I hit the drawer open button on the remote, the door opens 
	 and covers up the remote sensor and I can't close it again (without 
	 bending down and putting the remote close to the floor).  Of course 
	 I should be opening it up for a reason, shouldn't I?
	
After I listen to it for a while, I'll try to put some of my impressions down 
"on paper".  But for now, I highly recommend it (and it's currently on sale at 
Tweeter for $550).  I think the Adcom GDC-600 is the only choice for upper-end 
CD changers in this price range.

Later...
Steve

**************************************************************************///*
Steve Owen                                                               /// 
owen@emds.enet.dec.com                                               \\\/// 
                                                                      \XX/
*******************************************************************************
From: jap1@ns1.cc.lehigh.edu (JOSEPH ALEXANDER PADULA)
Newsgroups: rec.audio.high-end
Subject: Re: High-end dealers in Phila. area
Date: Thu, 24 Dec 1992 15:54:26 GMT
Organization: Lehigh University
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

In article <1h9rosINN6um@uwm.edu>, MIZUTANT@fred.wharton.upenn.edu (Taka Mizutani) writes:

(text edited)
>... I was wondering
>if anyone could suggest reputable high-end dealers in the Philadelphia
>area.
>
>I have received recommendations for Savant Audio and Woodbridge Stereo,
>both in the Princeton, NJ area. I have also heard that Soundex and Sound
>Service are not good. Any other places to go?
>

I don't know the nature of the criticisms Taka has heard about Soundex, but
I would like to offer a contrary opinion.

I have dealt with the people at Soundex for a several years now and have had 
nothing but positive experiences.  In fact, Soundex is the only audio
retailer that I feel comfortable in recommending, and I have dealt with
several over the years.  I have found them to be very knowledgeable, 
completely reputable and literally a pleasure to do business with.
They carry an extensive line of high-end equipment and have been in 
business for over 30 years.  In my experience, they provide
excellent service, stand behind what they sell and will usually even 
offer some reasonable (not large) discount on equipment.  Highly recommended.

Happy Holidays,
Joe Padula
From: trc.tellabs.com!ken@uwm.UUCP
Newsgroups: rec.audio.high-end
Subject: Question about DCC encoding/decoding
Date: Tue, 22 Dec 1992 13:59:30 +0000
Organization: University of Wisconsin - Milwaukee
	(queueing-rmail) id 200732.26487; Tue, 22 Dec 1992 20:07:32 EST
	(Smail3.1.28.1 #5) id m0n4FaB-0003qDC; Tue, 22 Dec 92 13:47 CST
	by trc.trc.tellabs.COM (4.1/smail2.5/09-08-89)
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

How unique is the encoding/decoding process of DCC.  More specifically, if
I record a CD with two different DCC decks, will the info on the two tapes
be identical?  If I recorded the same CD on two different tapes using the
same DCC deck, will the tapes be identical?

Conversely, if I play the same DCC tape on two different DCC decks, will
the two DCC decoders send identical data to the respective DACs?  If I play
the same tape on the same DCC deck, will the data sent to the DAC be
identical both times?

Please include references if you can.  Send replies directly to my email
address.  Thanks in advance.

---------------------------------------------------
Ken Laberteaux

ken@trc.tellabs.com
Tellabs Research Center
219-259-9818
From: bp@cs.brown.edu (Boris Putanec)
Newsgroups: rec.audio.high-end
Subject: Re: Bulk DAT tapes
Date: Mon, 28 Dec 1992 16:11:42 GMT
Organization: Department of Computer Science, Brown University
Distribution: usa
NNTP-Posting-Host: 129.89.7.4
Originator: tjk@csd4.csd.uwm.edu

In article <1hn1cmINNigs@uwm.edu> stuartz@sco.COM (Stuart Zimny) writes:

   Does anyone out there know where I can obtain blank DAT tapes in
   bulk (ie, 10 or more)?

   I'm interested in varying lengths (60, 90, 120) and either name or
   non-name brands.

Tape World (1-800-DAT-TAPE) meets all the above requirements and has
good prices to boot. $6.99 for Sony and Dennon 120 minute tapes last
time I ordered. Reliable place as well.

boris
From: rons@tv.tv.tek.com (Ron Selberg)
Newsgroups: rec.audio.high-end
Subject: Tube amp driver stages
Date: Wed, 23 Dec 1992 19:54:21 GMT
Organization: Tektronix TV Products
  (5.65c.tv/IDA-1.4.4 for <rec-audio-high-end@tektronix.tek.com>); Wed, 23 Dec 1992 11:54:51 -0800
Distribution: usa
NNTP-Posting-Host: 129.89.7.4
Originator: rons@soul.tv.tek.com
Originator: tjk@csd4.csd.uwm.edu

I have been working with a pair of old Bigg of California 50W tube power
amps. I am simply rebuilding them to the original schematic using high quality
components and a solid state power supply. With much better supply filtering
as well.
I am lucky enough to have easy access to the Audio Precision measurement 
system and will test both as soon as they are done. We did some testing on
the first one after I finished and the results look very promising! Proof will
be in the listening.
The question I have is with the driver stage.  
These are "advertised" as williamson amps. However, after reading the Glass
Audio article on the Curcio moded Dynaco ST-70, I see that the williamson
approach may not be the best sonically.
If someone would take the time to explain the alternate approaches to the 
driver stage section, I would be able to try some different approaches with
these amps. And I could measure the effects on distortion, response, etc.

Also, I found a disabled HH Scott integrated amp lurking in a pile of
assorted earlier years stuff in my closet. Worthless due to it's condition
with the exception of the output transformers. This amp looks to have been
about 40W per channel and the transformer have alot of iron. Much larger
than say a ST-70 transformer. Output tubes were 7591's and were not in the 
ultralinear mode. 
Anyone know about the quality of these x-formers?

Thanks and Merry Christmas everyone!

RON
From: evan@top.cis.syr.edu (Evan Cheng)
Newsgroups: rec.audio.high-end
Subject: FOR SALE: NAD 5000 CD Player
Date: Sat, 19 Dec 92 03:25:43 EST
Organization: Syracuse University, CIS Dept.
Distribution: usa
NNTP-Posting-Host: 129.89.7.4
Keywords: CD Player, Sale
Originator: tjk@csd4.csd.uwm.edu

Hi folks.

I am selling my NAD 5000 CD Player. It's a single-box British designed
player. Recommended by Stereophile (Class D, October 1992).

It has all the common features that any good CD player has. But it also
has a very nice variable output and you can remote control its volumn. I
found that connecting the variable output directly to my power-amp to be
worthwhile when I don't need any balance control. Without going through
my pre-amp, the sound is much more transparent. (Mind you, I have a very
good pre-amp - PS Audio 5.0 - so it's not saying my pre-amp is at
fault.)

Stereophile said that the variable output is worse than the fixed-level
output. I agree. (Yes, I connected both the variable and fixed-level
outputs to my pre-amp and tested them.) But it will take a pretty
discriminating pair of ears to detect the difference.

I also compared the sound of this machine to Rotel 955AX. My NAD 5000 has
better-extended low frequencies. It's not quite as transparent as the
Rotel player, but there isn't a gross difference. Also NAD 5000 is not
quite as sensitive to the cables as Rotel does.

So the conclusion is that it's one of the best entry-level CD players.
But it's still entry-level. Therefore I am selling it and am planning to
get a Melos CD-T Bit player. Therefore you are getting a good deal.

The list price for this player is $499. I am asking $300 (plus shipping)
for it. I bought it three months ago, so there is 21 months parts and labor
warranty left. It is (of course) in mint condition, and I have the
original manual and box for it.

Just one last thing. I am leaving for my vacation on the 24th but I'll
be back on the 13th next month (year). So send your reply as soon as
possible so we can arrange something now.

Thanks.

Evan Cheng
(evan@top.cis.syr.edu)
From: wrobel@mltsparc1.gmd.de (Stefan Wrobel)
Newsgroups: rec.audio.high-end
Subject: Sony's Mini-Disc - Mixed review in "stereoplay" magazine
Date: Tue, 22 Dec 1992 14:11:08 GMT
Organization: GMD, Sankt Augustin, Germany
NNTP-Posting-Host: 129.89.7.4
Keywords: MD, DCC, DAT
Originator: tjk@csd4.csd.uwm.edu

The German magazine "stereoplay" has tested MD, DCC, DAT, and CC
against each other.  Here's a summary.  They like the features and
ease of use of MD, but find "the sound of MD disappointing".  They say
that a grand piano sounded more like an electric piano, and that MD
added lots of noise even to digital copies.  As an overall rating,
they ranked it in the same class as standard analog cassette
recorders, and not on a par with top-of-the line analog machines.  In
the measurements, they found "stronger noise around 3 kHz, and hissing
encoding error noise around 10kHz," which totally masked the test
signal above 10kHz.  In addition, components above 12kHz had totally
been dropped by the data reduction algorithm.

DCC, on the other hand, received positive reviews and was found to be
almost on a par with CD.  For their test signal, DCC data reduction
dropped everything above 10kHz (!), but did not introduce noise below
10kHz.  stereoplay also noted that DCC is sluggish (around 40 seconds
to read the table of contents before recording), from personal
experience it seems it's even slower to skip to the next of previous
title than analog cassette decks.  DATs do all this an order of
magnitude faster, and they (Aiwa, JVC) are hitting the 700 DM (400$)
line here in Germany now.  stereoplay found the new generation of DATs
to be of the same reproduction quality as top-notch CD.

Happy holidays to all netters,

Stefan.
From: mohan@yoko.rutgers.edu (sunil Mohan)
Newsgroups: rec.audio.high-end
Subject: Where can I buy Audio Quality Electronic Parts (pots, caps, etc.)?
Date: 19 Dec 92 01:55:55 GMT
Organization: Rutgers Univ., New Brunswick, N.J.
Distribution: usa
NNTP-Posting-Host: 129.89.7.4
Keywords: ALPS Pots, Capacitors, etc.
Originator: tjk@csd4.csd.uwm.edu



I have an Acoustat TNP Pre-amp that I would like to fix up. I read
about the ALPS Potentiometer (Volume Control), and about some special
Capacitors whose name I forgot. Could someone tell me where I could
buy/order such parts from, in small quantities. Especially if there is
some store in NJ, or NYCity.

_
Sunil
From: alh@einoed.in-berlin.de (Adrian Le Hanne)
Newsgroups: rec.audio.high-end
Subject: How do i check symmetrical cabling?
Date: Mon, 21 Dec 1992 12:19:51 GMT
Organization: Einoed Unix & Netzwerke, Berlin (FRG)
NNTP-Posting-Host: 129.89.7.4
Keywords: symmetrical XLR Cannon Denon AVM
Originator: tjk@csd4.csd.uwm.edu

Hi,
i have two (not very good sounding) Denon POA 4400 mono amplifiers, which are
connected symmetrically to an AVM Evolution V1 preamp. I had to swap the 
three pin XLR plugs against four pin XLR since the AVM delivers an additional 
signal to switch the mono amplifiers on. The AVM came with a wiring scheme of 
the XLR pin out but i didn't get one for the Denon so i assumed that the Denon 
would be wired the same way. 

How can i test the cables for correct wiring? If i understand this right it
makes no difference if both cables have swapped signals.

Please reply via e-mail.

thanks and a nice holiday to you,
Adrian
-- 
Adrian S. Le Hanne        Einoed Unix & Netzwerke, Koepenicker Str.154, D-1000
alh@einoed.in-berlin.de   Berlin 36. Tel.: 030/611 31 26,  Fax.: 030/611 32 86
  "On a day such as this you should insist on more than the truth" -Pere Ubu