Portable Electronic Calculators

Home > Hand-held Calculators

Addmaster Auditor 8KB

Addmaster Auditor 8KB

Addmaster Auditor 8KB

Distinctive features: A hybrid desktop & hand-held calculator - It has both a transformer for AC operation and rechargeable batteries for hand-held use.

Technical details:
Display is 8 digits, amber gas-discharge.


Main integrated circuit - Texas Instruments TMS0102NC, here date coded week 20 1972.

Switchable between AC and battery operation.

145 x 225 x 72 mm (5.7" x 8.9" x 2.8").

Introduced mid-1972, cost £59.50 GBP (about US $142).

Made in U.S.A.


View inside showing the gas-discharge display on the right, with the rechargeable battery pack to the left of it, and the transformer to the left of that.

Allowing the machine to be switchable between AC and battery operation gives the advantage of each, at the disadvantage of the transformer making the machine larger and heavier.

Vintage Calculators

Text & photographs copyright, except where stated otherwise, © Nigel Tout 2000-2024.