DATAMATH CALCULATOR MUSEUM
Texas Instruments SR-11 Version 1
|Date of introduction:||September 11, 1973||Display technology:||LED modules + lens|
|New price:||$119.95||Display size:||8 + 2|
|Size:|| 6.3" x 3.1" x
158 x 78 x 38 mm3
|Weight:||9.2 ounces, 262 grams||Serial No:|
|Batteries:||3*AA NiCd||Date of manufacture:||wk 16 year 1974|
|AC-Adapter:||AC9200, AC9130||Origin of manufacture:||USA|
|Program steps:||Courtesy of:||Joerg Woerner|
|Download manual:||(US: 5.2 MByte)|
The SR-11 calculator added a constant-switch and PI to the wedge shaped predecessor SR-10. More notable was the new layout of the keyboard, with the SR-11 Texas Instruments introduced the smaller keys known from todays calculators. Compared to later models the keyboard was colorful arranged, the last calculator with blue and orange keys was the SR-50.
inside view of the SR-10 and its successor SR-11 look very similar, compare them
The display of this early SR-11 makes use of two LED-modules (Light Emitting Devices) known already from the Datamath calculator, the later SR-11 changed the construction to 12 discrete LED-modules.
Recently a SR-11 manufactured in Spain was discovered.
It took 12 years and a similar scientific calculator with just the 1/x, x2, sqr(x) and PI keys appeared, don't miss the rare TI-18 SLR.
Press the X-RAY button and view the
internals of a late SR-11.
(Pictures provided by Edward Soudentas)
If you have additions to the above article please email: email@example.com.
© Joerg Woerner, December 5, 2001. No reprints without written permission.