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Texas Instruments SR-16

Date of introduction:  October 25, 1974 Display technology:  LED modules + lens
New price:  $99.95, DM 298.00 Display size:  8 + 2
Size:  6.3" x 3.1" x 1.5"    
Weight:  9 ounces Serial No:  106659
Batteries:  3*AA NiCd Date of manufacture:  wk 39 year 1975
AC-Adapter:  AC9200, AC9130A Origin of manufacture:  USA
Precision:  8 Integrated circuits:  TMS1001
Memories:      
Program steps:   Courtesy of:  Joerg Woerner
    Download manual:   (US: 2.648 kB)

The electronic slide rule SR-16 was the last calculator using the extreme wedge shaped housing of the SR-10 and SR-11. It was superseded by the SR-16 II in a conventional housing within one year. 

With the SR-40 prototype an upgraded version of the SR-16 II was developed bu never introduced to the market.

The colourful desing of the SR-11 leaved for a style similar to the later SR-50A. Technically the calculator was very similar to the predecessors, one interesting feature could be found in a higher accuracy of some calculations. If you are interested in the calculating accuracy of scientific calculators don't miss the Calculator forensics.

SR-10_PCB3.jpg (138045 Byte)SR-16_PCBA.jpg (169318 Byte)SR-16_PCBB.jpg (58015 Byte)The internal construction of the SR-16 is similar to the late SR-10 Version 3, compare them yourself.



SR-16_PCBC.jpg (83312 Byte)In the meantime we discovered another version of the SR-16 with an unusual display. The production date is wk 37 year 1975 (Serial No 114394) but we assume that it is the result from a repair business.

The SR-16 could be called a rare calculator. Interested in really rare calculators ? View the TI-150

sr-16_PCB.jpg (166191 Byte)The TMS1001 used in this calculator was the first LSI MOS chip of the TMS1000 family. The picture at the right gives you a comparision between the first TMS1000 based calculator chip and one of the last ones found in a TI-30 STAT manufactured 13 years later.



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

© Joerg Woerner, December 5, 2001. No reprints without written permission.