||The update of the home page from 2008-03-17 somehow got lost; reinstated here. Link to "Studer List" removed -- defunct.
||Major update of pubshed
||Updated "Azimuth in a Magnetic Tape Recorder"
||Added alternate email address email@example.com for anyone having difficulty contacting us at the comcast.net address.
||Price increase from 2008-04-01, PubPL2008 ; available on ATR Magnetics Tape; international dealers updated; prepay removed -- nobody does it|
||Minor cleanup; added jm biography link.|
|2007-12-26||Added explanation of MRL Catalog Numbers to the "List of Publications"|
||Bibliography of papers by J. McKnight now includes links to PDF files of many of the papers.|
||Ref to prices changed to
||Price increase, 10 $ per
item from 2006-11-03; new address & fone/fax.
||Added link to Jack Endino's measurements
of "head bumps"
||Added para "Delivery";
update "More Information..."
||Added "Go To" at top;
reworded a few places to clarify; added "About MRL" papers by Hodges
||Added links to McKnight
||All publications updated
to new prices, dated 2005-07-01, with 15 % increase. Major revision of
Pub 203 (Polarity).
||PL2005 linked to top
||Price increase for
||Some minor editing; added
Calibration Tapes for 15 in/s with MRL 'Studio Master' Equalization,
for Open-Reel Applications"; minor editing to "Tape
Recording Equalization Fundamentals and 15 in/s Equalizations" to
a few days ago; major revision of Fundamentals
and Equalizations for 15 in/s .
||Added technical papers "
Revisited" , and Tape
||Corrected link for Speed;
||Added Biasing in Magnetic Tape Recording|
||Added updated Pub AME, Multifrequency Cal Tapes With Ampex Master Equalization; with tech references on AME|
||Link for "Low-Frequency
Response Calibration of a Multitrack Magnetic Tape Recording and
Reproducing System" corrected
||Added technical papers "Flux
and Flux-Frequency Measurements and Standardization in Magnetic
Recording" and "Tape
Flux Measurement Revisited "
||Added link to catalog of TEAC Cassette
Calibration Tapes to cassvend.html
Dealers List updated
||New prices posted for all
Publications at 21:50 pt.
(Ampex Master Equalization). Replaced with Pub
AME on 2004-03-23
||Added PubSMS3, Two-Speed Short Calibration Tapes: The "version" numbers (second three digits only) of all of the 2-speed tapes that we have programmed. Everything in Pub SMS2a, and many more.|
list , Pub101,
posted. -2004 posted this date,
deleted on 2004-01-19 Ref to "2004" deleted 2004-01-23
||Notice of price increase added
||Added reference to "sticky-shed"
to Technical Papers; added reference to The Studer List .
||Rearranged some of the
||Added "Which Calibration Tape Should I Buy? An Elementary Guide"|
Frequency Response Calibration..." to technical
|2003-06-13||International Dealer List updated; web URLs added where available.|
|2003-05-19||Replaced "Tape Recording Equalization -- Table of Standard Responses from IEC Standard 60094-1, Fig 1" with "Standard Tape Flux vs Frequency (IEC Standard, table of values, and program to calculate differences)"|
|2003-01-29||Added "Pub 673" (1 kHz, 10 kHz, 16 kHz, 100 Hz tones); corrected typo & reformatted "Demagnetizing..."|
|2003-01-10||"Two-Speed Short Calibration Tapes" Pub SMS2 replaced by re-organized (easier to figure out) Pub SMS2a; AES Journal papers now available as pdf files from MRL; "More Information..." links added.|
|2002-12-02||US dealer list updated|
|2002-09-09||Repair "back" link in "calibration tapes"; changed reference|
|2002-04-16||Updated CA sales tax rate to 7.25 / 8.25 %; added getting papers from the AES by email; Pub 101 minor update of 2002-02-28|
|2002-02-28||International dealer list updated|
|2001-10-24||Minor text edit; Choo&U V5.6 replaced with V5.7 (minor edit)|
|2001-08-02||Minor text edit; turned this "update" table end-for-end|
|2001-07-31||Minor text update in "PubCHROM"|
|2001-07-03||Add link to "Scrape Flutter and Tape Compliance Bibliography"|
|2001-06-12||USA Dealer List updated, this date|
|2001-05-30||Add links to "Tape Recording Equalization --
Table of Standard Responses from IEC Standard 60094-1, Fig 1" and
"Tape Recording Equalization -- Historical Table of Transition Frequencies / Time Constants from 1969 SMPTE paper"
|2001-05-02||Errors in some links corrected|
|2001-04-20||More minor text clarifications|
|2001-04-05||Numerous minor text clarifications.|
|2001-01-12||CA state tax rate changed to 7 %; "Speed..." and "Proposed Mastering Equalization..." available online|
|2000-10-16||"Price Increase" text deleted; description of "Publications Order Form" reworded.|
|2000-10-09||New prices posted for all publications; pdf file sizes corrected or Orderlit; "Price Increase" text updated.|
|2000-10-05||New prices posted for Pub PL2000, Pub 101, Pub Chrom, Pub SMS1, and Pub SMS2|
|2000-09-07||Price increase corrected to "about 12 %"|
|2000-08-22||Added "Price Increase"|
|2000-06-19||Add link to "Field Strength for Partial Erasure..."|
|2000-04-13||Add Warranty Return Form to Publication Order Form|
|2000-04-05||Add reference to getting "Proposed Equalization for 15 in/s Studio Master Recording...", & some more cleanup|
|2000-04-04||Reorganized a little; add tech paper "Azimuth in Magnetic Tape Recording"; unify two papers on equalization|
|2000-03-07||Add reference to getting "Speed, Pitch, and Timing..." reprint.|
|2000-03-06||Update Choo&U: Ver 5.6, 2000-02-29|
|1999-09-13||Update Pub 313: Graticule image added|
|1999-09-08||Added technical paper "Head Height Alignment Methods"|
|1999-08-31||Update Pub 203: add reprint of "Polarity Calibration Tape (Issue 2)", from AES Journal|
|1999-05-11||Update Cassette Tape info; add tech papers on equalization|
|1999-01-26||Update PubPL95, "Price List" to show that it is still current; update $trans, "International Monetary Transfers" to show that we now accept credit cards|
|1998-12-08||Updated Pub 203, "Polarity Calibration Tapes"|
|1998-08-19||Added technical paper "Is My Calibration Tape Still Accurate?"|
|1998-06-16||Minor update to Choosing & Using ..., now Ver. 5.5|
|1998-05-07:||USA Dealers updated; added International Dealers, Bibliography of technical papers by J. McKnight, and technical paper "Demagnetizing a Tape Recorder"|
|1998-02-26||Ordering information added|