TI 9100 LORAN-C Receiver Type III

© Brooke Clarke 2005 - 227


TI 9100 Front Panel
TI 9100 Front PanelBottom Inside
TI 9100 Front Panel
TI 9100 Rear Panel
Bottom Inside
Analog

Background

Texas Instruments made these LORAN-C receivers from 1981 to 1986 and stopped production because even with Mexican assembly their price was not competitive with far east manufacturers.  TI being a semiconductor company made a micro processor along with Motorola, Intel and others.  This product made use of the TI uP.

Description

This is an aircraft receiver.  A little over 6" wide, 3¼" high and 12½" deep.  There's a 37 male pin "D" type connector n the rear panel as well as a ground post.  If you have pin out information on the DB-37 connector please let me know.

The rear label reads:
Made in U.S.A.
Texas Instruments
Dallas, Texas
LORAN C Receiver, Type III
Model No. 9100 Serial No. 91A 0599
US Patent No 4134117  Other Patents Pending
DO-160A ENV.CAT A1B1/A/PKS/EXXXXXXBABB

Stamped on the rear panel is:
FAA-PMA
P/N 2480060-1
North Atlantic Chain Data

APN-157 Aircraft Loran-C Receiver

The APN-157 is an all analog LORAN-C receiver that uses a scope to measure time differences between stations.  This is probably a first generation receiver for LORAN-C and is probably based on the older 1.8 MHz LORAN receivers.
APN-157 Front
APN-157 Inside
Front Panel with Scope
Inside with modules

LORAN-C Patents

Texas Instruments Incorporated (Dallas, TX)


4539566 Automatic interference canceling apparatus September 3, 1985 342/389; 342/417; 455/306
4428052 Navigational aid autopilot Jan 24, 1984 701/117; 701/207; 701/217; 701/224; 701/225
4134117 Loran C receiver January 9, 1979 342/389; 701/207; 701/219

Others

4812851 Radio receiver with automatic interference cancellation March 14, 1989 342/389; 455/307 Digital Marine Electronics Corporation (Acton, MA)
4674051 Navigation point locating system June 16, 1987 701/200; 342/401; 342/404; 701/203; 701/207; 701/225 Sundstrand Data Control, Inc. (Redmond, WA)
RE31962 LORAN-C navigation apparatus July 30, 1985 342/389; 701/219 Sanders Associates, Inc. (Nashua, NH)
4445223 Apparatus and method for determining the presence and frequency of a periodic signal April 24, 1984 375/343; 342/389 Motorola, Inc. (Schaumburg, IL)
4325068 Loran-C signal processor April 13, 1982 342/389; 455/304; 455/305; 702/191 Sanders Associates, Inc. (Nashua, NH)
4318105 Loran-C navigation apparatus March 2, 1982 342/389; 701/219
4024383 Method and system for navigation employing incremental range difference May 17, 1977 701/207; 342/388; 342/396; 342/397 Lockheed Aircraft Corporation (Burbank, CA)
3947849 Loran receiver-navigator March 30, 1976 342/389; 701/219 The Johns Hopkins University (Baltimore, MD) - for jet aircraft where multiple chains will be crossed rapidly

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