Assembled module for the often damaged flexible PCB in the battery bay (and I/O ports) of the HP-41c range of calculators. Shipping included in price for EU customers.

New price: cheaper circuit translating to 10% lower price!

Two long screw for the lower screw posts of HP41c calculators

Two long screw for the lower screw posts of HP41c calculators + two long screws for upper posts.

Two long screw for the lower screw posts of HP41c calculators - black

Set of 8 pairs of spacers for nut-screwed full-nut HP41c calculators. Substitutes the nuts that are screwed on the lower posts to secure the circuit, 

Battery holder case for the Woodstock family of calculators, made with 3D printing and springs in stainless steel 304 alloy

Adhesive black silicone feet for HP41c HP41cv HP41cx calculators

Adhesive black silicone feet for HP12c, 12c Platinum calculators

Piece to repair HP41c series upper screw posts (tested with both fullnut and halfnut versions)

Extended Memory for HP41c, HP41cv and HP41cx calculators 

User Manual Extended Functions/ Extended Memory

Set of pieces needed to repair successfully the lower posts of HP41C, 41CV and 41CX full nut calculators, including zebra connectors, lower post part, and keyboard support for clothes' pegs to protect the keyboard

Zebra Holder to keep the elastomeric zebra connectors in the contacts between main board and processor circuit in the HP41c calculator family, full nut versions.

1 Piece for repairing HP41c back cases.

This piece is for repair of HP41c back halves, specifically the support of the upper screw heads that is often damaged, and very difficult to repair in a lasting way.

Repaired back side of HP41c. It can be used in case the original backside has the screw supports broken.

HP41c side cover.

Adhesive circuit for the often damaged flexible PCB in the battery bay (and I/O ports) of the HP-41c range of calculators. Shipping included in price.

The HP 82143A is a thermal printer that was connected to a slot of the HP-41 series calculators. This printer was introduced with the first hp 41c. At the time, it was the first calculator that could use an external printer - in the line of endless expandability.

This unit works flawlessly and comes with a nearly complete paper roll and a new one.

4 pieces for repairing HP41c back cases.

This piece is for repair of HP41c back halves, specifically the support of the upper screw heads that is often damaged, and very difficult to repair in a lasting way.

Thermal Paper for HP calculator printers: (HP 82240a & b, HP-92 & HP-97, 82143a & HP-IL printer) single roll

We offer the flashing of new firmware for the 10bII+, 12c+, 20b and 30b.

These calculators have a port that allows the user to flash a new firmware. For that, a special cable is needed.

HP Surveying module - tested

N.O.S. Power Supply for the HP 82240B printer. Experience how fast your printer can go - compared with running off batteries. It is a different world!

Attention - UK plug - not Schuko. For European or American users, an adapter is required

If you need to do quick calculations on the road, our compact, stylish Quick Calc calculator is ready. It's simple to use, and so small that you can keep it on your key chain, in your handbag or briefcase, or in your car.

Compact and stylish

• Use at home, in the office, or in between
• Attach to a refrigerator or metal desk or cabinet via the magnetic back
• Carry and store on a key chain, in your bag or briefcase, or in the car

Memory for HP41c calculators (64 registers)

Battery holder case for the HP41 family of calculators

HP82104A Card Reader for HP41c family with manual

Quad Memory for HP41c calculators (256 registers)

Full-nut processor - please select C or CV type, or installation in your machine

Piece to repair HP41c full nut series lower screw posts

Piece required for the lower post repair of HP41c calculators.

Battery holder case for the HP41 family of calculators, made with 3D printing and springs in stainless steel 304 alloy

HP41c back port cover - 3D, new - set of 4.

Stainless steel 304 springs for HP41C battery holder

Battery cover for HP12C (for 3 LR44 battery original model)

LR44 battery for calculators of Voyager series (HP10c, HP11c, HP12c old, HP15c and HP16c) and Pioneer series (HP10b, HP17bII, HP42s, HP27s)