Contributed by Steve Cichorsky. 

November 28, 1942, Telephony (special issue).  "World's biggest PBX" serves 20,000 phones.  Only 10 jacks per 100 lines.  (Contributed by Steve Cichorsky.)

1943.

Contributed by Steve Cichorsky.  OCR by Clint Gilliland.

Contributed by Steve Cichorsky. 

Several internal memos discussing transmission and zoning implications of the new 500-type sets.  Includes a mention of the 4,000 unit 1949 trial and projected production quantities for the 500B:  50Q2 - 23K, 50Q3 - 49K and 50Q4 - 49K; and for the 401B: 50Q4 - 20K.  Price for a 500B = $14.30.  Also see AB43.910  Contributed by Clint Gilliland.

51 pages. Alexander Graham Bell Commemorative issue. Contributed, scanned and bookmarked by Steve Cichorsky. OCR by John Novack.

Notes on the Discussions at the Conference of Bell System Lecturers, May 1949.  Detailed description of the new 500 set -- features and internal components. Introduction year.  Interesting speculations on possible future directions. OCR by Paul Fassbender.

Notes on the Discussions at the May 1949 Conference of Bell System Lecturers - covers the new 500 set design.
- Transmission Characteristics of the New Telephone Set, W. C. Jones, p 75-87
- Components of the New Telephone Set, W. L. Tuffnell, p 88-110
Contributed by Steve Cichorsky.  OCR by Clint Gilliland.

WE Magazine Nov-Dec 1953. Centralized Automatic Message Accounting.

Article from WE Magazine Nov-Dec 1953 - about the DEW line project:

"On the northern fringes of the continent W.E. has built the first units of America's Distant Early Warning Line"

1953, Pacific Telephone Magazine. Contributed by Steve Cichorsky.

September 1953, Pacific Telephone Magazine.  Includes photos.  Contributed by Steve Cichorsky.

September 1953, Pacific Telephone Magazine.  Explains financial motivation for installing refurbed equipment.  Contributed by Steve Cichorsky.

September 1953. Includes photos of booths. Contributed by Steve Cichorsky. 

Contributed by John Novack.

EDUCATIONAL BULLETIN NO. 2.50
FUNDAMENTALS OF EQUIPMENT ENGINEERING - "This bulletin ls issued to describe the fundamental routines and practices employed by the Equipment Engineer. Informat1on contained herein is to be used for training purposes only."

Includes an exhaustive description of "Information and References Used by Equipment Engineers," such as drawing types, keysheets, standard specifications (J-, K-, KS-, and C-), reference books, etc. For example:

KS SPECIFICATION - Specifications issued by the Bell Telephone Laboratories covering engineering requirements manufactured by outside suppliers.

Specifications in the KS-5000 series are issued to cover engineering requirements which must be met by outside suppliers in connection with equipment wh1ch they furnish to the Western Electric Company. These specifications are used by the Merchandise and Manufacturing Departments for ordering, analyzing and editing purposes and by the Inspection Department for checking Purposes.

Contributed by Greg Gobel.  OCR by Karl Brose.

"Service Through Sales" Handbook - Oregon Plant Dept. - July 1955

Small booklet with 5" x 3" pages showing available equipment. Including early colored 500 sets and Continental and Imperial models.

scanned by: Remco Enthoven

From the collection of the JKL Museum of Telephony

 161 pages.  Principles of transmission engineering presented "in a simple and non-technical way."  Contributed by Steve Cichorsky.