A few months ago, I bought a bundle of a few very nice vintage calculators on eBay, including a 1974 Texas Instruments TI-2500 “Datamath” – this was in good physical condition but was untested and sold-as-seen. The Texas Instruments TI-2500 Datamath was a professional pocket calculator from 1972 with an early LED display and aContinue reading “1974 Texas Instruments TI-2500 Datamath Calculator Repair & Lithium Battery Upgrade”
Tag Archives: Calculator
1974 Sinclair Scientific Calculator Repair & Restoration
I recently acquired a Sinclair Scientific calculator from 1974, alongside a large bundle of vintage computers – this was an unexpected (but very welcome) surprise and is in fact my first vintage calculator, though it is basically a pocket computer, so it is certainly in keeping with the rest of my collection. The calculator wasContinue reading “1974 Sinclair Scientific Calculator Repair & Restoration”