DATAMATH CALCULATOR MUSEUM
Longines Symphonette Electronic Calculator (B Series)
|Date of introduction:||1972||Display technology:||LED-modules|
|New price:||Display size:||8|
|Size:|| 5.8" x 3.5" x 1.5"
147 x 88 x 38 mm3
|Weight:||6.7 ounces, 191 grams||Serial No:||B 5033|
|Batteries:||4*NiCd AA||Date of manufacture:||mth 12 year 1972|
|AC-Adapter:||unknown||Origin of manufacture:||USA|
|Program steps:||Courtesy of:||Joerg Woerner|
Just a minor design variation of the original Longines Symphonette Electronic Calculator. Please focus on the color of the numeric keyboard caps.
Dismantling the featured Longines Symphonette Electronic Calculator manufactured in December 1972 reveals a typical design based on the TMS0103 single chip calculator circuit used in the famous Bowmar 901B. We locate the display drivers SN75491 and SN75492and even the display modules look familiar.
Klixon™ is a trademark of Texas Instruments.
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© Joerg Woerner, October 5, 2011. No reprints without written permission.