Older Updates to the MRL Home Page



2009-02-05
The update of the home page from 2008-03-17 somehow got lost; reinstated here. Link to "Studer List" removed -- defunct.
2009-01-30
Major update of pubshed
2008-12-23
Updated "Azimuth in a Magnetic Tape Recorder"
2008-12-14
Added alternate email address mrltapes@gmail.com for anyone having difficulty contacting us at the comcast.net address.
2008-03-17
Price increase from 2008-04-01, PubPL2008 ; available on ATR Magnetics Tape; international dealers updated; prepay removed -- nobody does it
2008-01-13
Minor cleanup; added jm biography link.
2007-12-26 Added explanation of MRL Catalog Numbers to the "List of Publications"
2007-09-10
Bibliography of papers by J. McKnight now includes links to PDF files of many of the papers.
2006-11-05
Ref to prices changed to "pubpl2006.pdf"
2006-10-24
Price increase, 10 $ per item from 2006-11-03; new address & fone/fax.
2006-08-11
Added link to Jack Endino's measurements of "head bumps"
2006-05-05
Added para "Delivery"; update "More Information..."
2006-05-02
Added "Go To" at top; reworded a few places to clarify; added "About MRL" papers by Hodges and Kostelnik.
2005-09-20
Added links to McKnight and Morrison papers from Ampex days..
2005-07-01
All publications updated to new prices, dated 2005-07-01, with 15 % increase. Major revision of Pub 203 (Polarity).
2005-06-07
PL2005 linked to top banner
2005-06-06
Price increase for 2005-07-01 announced
2005-02-18
Some minor editing; added new Pub101SM, "Multifrequency Reproducer 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 reference Pub101SM.
2004-05-27
Revised pubame a few days ago;  major revision of  Fundamentals and Equalizations for 15 in/s .
2004-05-10
Added technical papers " Master-tape Equalization Revisited" , and Tape Information Table.
2004-05-02
Corrected link for Speed; re-uploaded Demagnetization
2004-03-24
Added Biasing in Magnetic Tape Recording
2004-03-23
Added updated Pub AME, Multifrequency  Cal Tapes With Ampex Master Equalization; with tech references on AME
2004-02-21
Link for "Low-Frequency Response Calibration of a Multitrack Magnetic Tape Recording and Reproducing System" corrected
2004-02-11
Added technical papers "Flux and Flux-Frequency Measurements and Standardization in Magnetic Recording" and "Tape Flux Measurement Revisited " .
2004-02-10
Added link to catalog of TEAC Cassette Calibration Tapes to cassvend.html
2004-02-06
International Dealers List updated
2004-01-19
New prices posted for all Publications  at 21:50 pt.
2003-12-22
Added AME (Ampex Master Equalization). Replaced with Pub AME on 2004-03-23
2003-12-19
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.
2003-12-16
2004-01-19 price list , Pub101, and PubSMS2a, posted.  -2004 posted this date,  deleted on 2004-01-19  Ref to "2004" deleted 2004-01-23
2003-12-11
Notice of price increase added
2003-12-03
Added reference to "sticky-shed" to Technical Papers; added reference to The Studer List .
2003-11-03
Rearranged some of the text.
2003-09-03
Added "Which Calibration Tape Should I Buy? An Elementary Guide"
2003-09-03
Updated  "USA Dealer List"
2003-08-10
Added "Low Frequency Response Calibration..." to technical papers available.
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
1998-02-23: Originally posted