navtronic 1701tr

Date of introduction:  1979 Display technology:  LED-stick
New price:  $229.50 (1980) Display size:  12
Size:  5.9" x 3.2" x 1.5"
 150 x 81 x 39 mm3
Weight:  8.3 ounces, 235 grams Serial No:  SC5923
Batteries:  3*AA NiCd  Date of manufacture:  year 1979
AC-Adapter:   Origin of manufacture:  USA
Precision:  8 Integrated circuits:  MM5782, MM57129, MM5368, ITC1200, ITC1210, ITC4800, 2*ITC5028
Program steps:   Courtesy of:  Alicia Pendry 
    Download manual:   (US: 4.3 MByte)

The navtronic 1701tr is based on the earlier navtronic 16 but added a physical protection to the 14 LED-indicators on the keyboard panel.

The 1701tr is the high-end model of four very similar flight computers:

navtronic 1701: Basic navigation calculator
navtronic 1701t: Added TIMER function (START, STOP keys)
navtronic 1701r: RNAV functions (R1, R2, D1, D2 LED-indicators)
navtronic 1701tr: TIMER and RNAV functions

1701tr_PCB.jpg (302232 Byte)The electronics of the navtronic 16 and 1701 series is based on a National Semiconductor Chip-Set MM5782 and MM57129 surrounded by some unknown chips with ITCxxx designation. Main differences are the additional clock circuit MM5368 of the 1701t and 1701tr. 

In 1983 with the Navigator and Explorer enhanced flight computers were introduced.

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If you have additions to the above article please email:

Joerg Woerner, February 3, 2002. No reprints without written permission.