Teletronix LA-2A Secrets - The most complete information


The most complete information archive available anywhere on the Teletronix LA-2A. Includes manuals, schematics, photos, brochures, tweaks, modifications and other historical documents including two letters signed by James F. Lawrence, inventor of the LA-2A and President of Teletronix Engineering Company.

 Over 260 files and > 130 megabytes of information on the most revered tube audio compressor/limiter of all time.

Schematics, voltages and resistance measurements on three very special LA-2A's:

 - Modifications done by Doug Sax of The Mastering Lab
 - the AB Deluxe LA-2A, very rare and fantastic sounding units built by Al Burnham of Caribou Ranch Studios in the early seventies
 - Majick, the most incredible sounding LA-2A I've ever heard (and I've heard more than just about anybody)

Over 260 files, including:

 - 4 different versions of the Teletronix LA-2A instruction manual
 - 5 different schematics, including the Doug Sax mods and AB Deluxe power supply mods
 - Teletronix catalogs, flyers, ads, price lists and other promotional literature
 - Two letters signed by James F. Lawrence, inventor of the LA-2A and President of Teletronix Engineering Company.
 - Mechanical drawings, test procedures and data sheets on T4A and T4B components from the sixties through present day
 - Transformer catalogs, winding information, resistance measurements and other technical information
 - Theory of Operation
 - A technical paper submitted to the Journal of the Society of Motion Picture and Television Engineers
 - The original patent application for the electro-optical attenuator that is the basis for the design of the T4A and T4B units
 - 75 us FM Pre-Empasis schematics and modification instructions
 - Photos of the interior of the Universal Audio reissue prototype

and much, much more!

All pages scanned at 300 DPI or higher. This product is delivered as a downloadable zip file in Adobe PDF format and requires Adobe Acrobat Reader, available for free from and a utility such as WinRAR or WinZip to decompress the archive.

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  • Model: LA-2A-SECRETS
  • Manufactured by: GearSlut

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This product was added to our catalog on Wednesday 22 February, 2012.