DATAMATH  CALCULATOR  MUSEUM

Tamaya NC-77

Date of introduction:  1978 Display technology:  VFD
New price:   Display size:  12
Size:  5.9" x 3.5" x 1.1"    
Weight:  6.5 ounces Serial No:  61008551
Batteries:  4*AA or EA-19B Date of manufacture:  year 1982
AC-Adapter:  EA-14A Origin of manufacture:  Japan
Precision:  10 Integrated circuits:  SC38664, SC38665
Memories:  2    
Program steps:   Courtesy of:  Joerg Woerner

The Tamaya Digital Navigation Computer NC-77 was introduced already in the year 1978 and produced until 1991 ! You feel familiar with the housing of the NC-77 ? This one is made by Sharp Electronics Corporation for Tamaya & Company Limited, Tokyo, Japan.

Don't compare the NC-77 with the Flight computers like the Heathkit OCW-1401, this one is a Astro-Navigation Calculator. 

Find an interesting note on the website of Tamaya:

As you know, the validity of NC-77 almanac will be until 1999. But it can be used until June 23, 2007 with the following method:

January 2000 is entered as the thirteenth month of the year 1999. In this manner, practically, the Almanac can be automatically computed by NC-77 until February 29, 2000 (99.1429). After this date, the leap year and the number of days in each month must be taken into consideration when entering the day and month. You can enter until 99.9999, and it is June 23, 2007. The "Correspondence Table for NC-77 almanac" helps you to enter date. Thank you again for your long patronage on Tamaya NC-77. Bon voyage!

The line of Astro-Navigation Calculators covers the models NC-2, NC-77, NC-88, NC-99 and NC-2000.

If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, February 5, 2002. No reprints without written permission.