Folder BLR

See Chuck Hensley's comprehensive index to articles in the BLR in the folder below.  It can be used to locate articles to research, whether found in the TCI LIbrary or elsewhere.

Chuck has offered to scan a limited number of pages from his collection (at his convenience).  Send requests using the "Contact Us" link in the Menu Bar above.

HINT:  Search for "BLR" followed by a topic keyword to find a series of related articles.  Use alphabetic sort to display them in chronological order.  e.g.  BLR PBX  or  BLR Picturephone.

When posted, complete scanned BLR issues from Sept. 1925 - Dec. 1961 were available here:
  https://worldradiohistory.com/Bell_Laboratories_Record_Issue_Key.htm

Categories

Documents

pdf 60Mar BLR P82 Push Button Dialing Media Hamden Elgin Popular

373 downloads

Download (pdf, 2.03 MB)

60Mar_BLR_P82_Push_Button_Dialing_Media_Hamden_Elgin.pdf

60Mar BLR P82 Push Button Dialing Media Hamden Elgin

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 60Nov BLR P433 Spring Cords Popular

333 downloads

Download (pdf, 298 KB)

60Nov_BLR_P433_Spring_Cords.pdf

60Nov BLR P433 Spring Cords

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 61Jan BLR P14 Field Testing Electronic Tone Ringer Tel Crystal Lake Popular

323 downloads

Download (pdf, 1000 KB)

61Jan_BLR_P14_Field_Testing_Electronic_Ringer_Tel_Crystal_Lake.pdf

61Jan BLR P14 Field Testing Electronic Tone Ringer Tel Crystal Lake

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 61Jul BLR P240 Overseas Dialing Popular

330 downloads

Download (pdf, 1.81 MB)

61Jul_BLR_P240_Overseas_Dialing.pdf

61Jul BLR P240 Overseas Dialing

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 61May BLR P161 Pushbutton PBX 608A Popular

649 downloads

Download (pdf, 1.54 MB)

61May_BLR_P161_Pushbutton_PBX_608A.pdf

61May BLR P161 Pushbutton PBX 608A

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 61May BLR P185 Trimline Contour Field Trial Richmond VA Popular

400 downloads

Download (pdf, 223 KB)

61May_BLR_P185_Trimline_Contour_Field_Trial_Richmond_VA.pdf

61May BLR P185 Trimline Contour Field Trial Richmond VA

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 61Oct BLR P350 Automatic Card Dialer 40A Popular

600 downloads

Download (pdf, 905 KB)

61Oct_BLR_P350_Automatic_Card_Dialer_40A.pdf

61Oct BLR P350 Automatic Card Dialer 40A

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 61Sep BLR P313 Touch-Tone Calling Versatility Popular

363 downloads

Download (pdf, 1.04 MB)

61Sep_BLR_P313_Tone_Calling_Versatility.pdf

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 62Jun BLR P220 Single Slot Coin Set Trial Norfolk Popular

326 downloads

Download (pdf, 308 KB)

62Jun_BLR_P220_Single_Slot_Coin_Set_Trial_Norfolk.pdf

62Jun BLR P220 Single Slot Coin Set Trial Norfolk

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 62Mar BLR P74 - Low Speed Data Set Popular

370 downloads

Download (pdf, 2.02 MB)

62Mar_BLR_P74_Low_Speed_Data_Set.pdf

62Mar BLR P74 - Low Speed Data Set

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 63Aug BLR P269 TouchTone Card Dialer Trial Greensburg Findlay Popular

463 downloads

Download (pdf, 1.36 MB)

63Aug_BLR_P269_TouchTone_Card_Dialer_Trial_Greensburg_Findlay.pdf

63Aug BLR P269 TouchTone Card Dialer Trial Greensburg Findlay

July - August 1963.  Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 63Aug BLR P273 Trimline Ending Dial In Handset Trials Popular

423 downloads

Download (pdf, 153 KB)

63Aug_BLR_P273_Trimline_Ending_Dial_in_Handset_Trials.pdf

63Aug BLR P273 Trimline Ending Dial In Handset Trials

"Trimline II" field trial in Michigan. Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 63Jan BLR P2 FM Data Set Popular

382 downloads

Download (pdf, 1.86 MB)

63Jan_BLR_P2_FM_Data_Set.pdf

63Jan BLR P2 FM Data Set

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 63Jan BLR P12 PBX Range Charts Popular

440 downloads

Download (pdf, 1.35 MB)

63Jan_BLR_P12_PBX_Range_Charts.pdf

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 63Jun BLR P218 Home Interphone Popular

447 downloads

Download (pdf, 1.56 MB)

63Jun_BLR_P218_Home_Interphone.pdf

63Jun BLR P218 Home Interphone

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 63Jun BLR P237 PBX Consoles Popular

1148 downloads

Download (pdf, 1.13 MB)

63Jun_BLR_P237_PBX_Consoles.pdf

63Jun BLR P237 PBX Consoles

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 63Oct BLR P354 Testing TouchTone Set Popular

572 downloads

Download (pdf, 1.62 MB)

63Oct_BLR_P354_Testing_TouchTone_Set.pdf

63Oct BLR P354 Testing TouchTone Set

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 64Aug BLR P247 761A PBX Small Hotel Motel Popular

475 downloads

Download (pdf, 1.58 MB)

64Aug_BLR_P247_761A_PBX_Small_Hotel_Motel.pdf

64Aug BLR P247 761A PBX Small Hotel Motel

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 64May BLR P159 Handsets With Amplifiers G6 G7 G8 Popular

412 downloads

Download (pdf, 1.22 MB)

64May_BLR_P159_Handsets_With_Amplifiers_G6_G7_G8.pdf

64May BLR P159 Handsets With Amplifiers G6 G7 G8

Bell Laboratories Record. Contributed by Chuck Hensley.

pdf 65Nov BLR P395 Designing Telephone Ringers Popular

683 downloads

Download (pdf, 1.06 MB)

65Nov_BLR_P395_Designing_Telephone_Ringers.pdf

65Nov BLR P395 Designing Telephone Ringers

Bell Laboratories Record. Contributed by Chuck Hensley.

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