The Retro Directory

HP Calculator Repair

Barcelona

The Calculator Store (Barcelona) specialises in vintage HP calculator repair and parts — notably the HP‑41 family and Voyager models such as the HP‑12C/15C — and sells replacement components and restored/used calculators via its online shop. They offer quoted repairs (flat rates listed for common work), parts for HP41 restoration, and international shipping guidance.

TheEPROM9 - Vintage Calculators

TheEPROM9 is a UK-based enthusiast workshop and archive specialising in vintage calculators and retro computing. The site documents extensive teardowns, restorations and repairs of 1970s–1990s calculators (VFD, Nixie, panplex, bubble-LED, LCD) and a wide range of vintage computers and laptops, plus ROM dumps and reverse-engineering projects.

Vintage Calculators, ClassiC, Pre-Owned most with a warranty!

Oak Tree Vintage offers a large online catalogue of vintage and pre-owned calculators and electronic educational toys (TI, Hewlett‑Packard, Casio, Radio Shack, Mattel and more). Listings cover LED/LCD, scientific, programmable and graphing models from the 1970s–1990s; items are graded, tested and sold with a stated 90-day limited warranty.

ZX Spectrum – Adam's Vintage Computer Restorations

Adam's Vintage Computer Restorations is the personal site of electronics engineer Adam Wilson, who collects, documents and restores vintage computers and electronics. The site documents repairs and restorations for 1970s–1990s systems (including ZX Spectrum, Amiga, BBC Micro, Amstrad and early Macs), and advertises repair services, items for sale (eBay) and items wanted for purchase.