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

HP41CL with the latest version of Systemyde circuit

HP41c back port cover - original and used.

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.

Repair kit 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.

Parts for battery-back port module repair kit, or module assembled 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. Please choose option!

This piece is for repair of HP41c full nut calculator, substituting the damaged or corroded zebra connector that links the main board with the processor circuit. Pair

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.

Leather-like protective case for HP Calculators

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.

Time module for HP 41c/vc calcs 

The Hewlett Packard 3478A unit is a digital multímeter capable of performing 5 different types of measurements: DC voltage, true RMS AC voltage, 2 and 4 wire resistance, and AC and DC current.

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

After the introduction of the HP 15c, the HP41c, while being the only alphanumeric, expandable, I/O-capable calculator, was not anymore the best mathematical calculator. Therefore, HP set to implement the  best mathematical routines in the Advantage pac. It included integrals, solver, matrix, Time Value of Money routines, and much more.

Extended Memory for HP41c, HP41cv and HP41cx calculators

Memory for HP41c calculators (64 registers)

Battery holder case for the HP41 family of calculators

Rare Double Extended Memory for HP41c, HP41cv and HP41cx calculators

HP-IL interface module for the HP41 calculator family