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Path: utzoo!watmath!clyde!cbosgd!ihnp4!ihlpm!terry2
From: terry2@ihlpm.UUCP (t. nelson)
Newsgroups: net.audio
Subject: Nakamichi Alignment/Equalization
Message-ID: <175@ihlpm.UUCP>
Date: Sat, 16-Mar-85 01:23:20 EST
Article-I.D.: ihlpm.175
Posted: Sat Mar 16 01:23:20 1985
Date-Received: Sun, 17-Mar-85 00:12:35 EST
Distribution: net
Organization: AT&T Bell Laboratories
Lines: 42


In reference to the discussion about Nakamichi cassette decks and
their alignment and equalization...

   I have been using a LX-5 for the last two years. As with all of my
other audio equipment, I also purchased the service manual. There is 
nothing unusual about Nakamichis' mechanical alignment procedures
except that they are very thorough and, for a complete alignment,
require Nakamichi designed alignment gauges (i.e. Tilt Check Gauge,
Stroke Check Gauge, etc.).  There is also nothing unusual about
the electrical alignment except that there is a playback adjustment
for very high frequencies used to compensate for possible "gap loss
of the playback head".  This adjustment is referred to in the
service manual as a "Peaking Adjustment for high frequency response"
and the adjustments minimum and maximum effect is 0 to +4 db at 25kHz.
(No, 25 kHz is not a misprint!)

   As to the equalization controversy, Nakamichi has published two
documents that thoroughly explain their strict adherence to
Phillips and IEC standards:

     1.  Nakamichi Technical Bulletin 2
     2.  Nakamichi Cassette Equalization: The Standard View

   I obtained these documents directly from Nakamichi shortly after
I purchased my LX-5 and I assume they are still available today.
If not, I can provide copies to those genuinely interested (assuming
the response is not overwhelming).

   Oh, and yes I highly recommend Nakamichi decks. Their performance
is simply superb.


Terry Nelson
AT&T Bell Laboratories
Room IH-4E319
Naperville-Wheaton Rd.
Naperville, Illinois 60566
312-979-4512

******** The comments expressed above are those of the author and not
                         AT&T Bell Laboratories ******