The HP41 Corner

New book from The Calculator Store: HP41 Repair: A Beginner's Guide to Repairing your HP41 Calculator. 14.00€ paperback version, 9.99 Kindle version. Only in Amazon

We have been told that the book is not visible in some of the amazon websites worldwide. Here we offer links to all of them:

amazon.com
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Kindle and paperback versions available now!

The HP41c calculator, produced from 1979 until 1990, was the standard in engineering and sciences during most of its life. Programmable, alphanumeric, with a high contrast LCD screen, and expandable, it was a true computer in your pocket. Here is our web hommage to it.

Its capabilities could be extended by means of ROM modules with additional functions, and with interfaces it could use printers, plotters, mass storage devices, bar code readers, measurement instruments, etc.

Recently, the user community has developed both new software in ROMs (like the Sandmath family) and hardware: a circuit that substitutes the original and throroughly updates the calculator in terms of speed, memory and functions, including all known modules ever developed (the HP41CL from Monte Dalrymple)

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Zebra + Lower post Product no.: zebra+lowerpost Set of zebra + lower post repair piece 26.00 € * Old price 41.00 € In stock (4) Compare	Assembled HP-41c battery bay and expansion ports module Product no.: Flex-PCB Assembled 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. Black Friday: 20% off 44.00 € * Old price 55.00 € In stock can be shipped within 10 days (43) Compare	New Lower Post Repair part Product no.: Lowpostrepair Piece to repair HP41c full nut series lower screw posts 16.00 € * In stock (11) Compare
New Upper Post Repair part Product no.: UpperPostRepair Piece to repair HP41c series upper screw posts (tested with both fullnut and halfnut versions) 16.00 € * Still in stock (7) Compare	Assembled HP-41c battery bay and expansion ports module Flat Product no.: Flex-PCB AssembledFlat 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. This is the FLAT version, when the screw head domes are broken and grinded down - see pictures. Black Friday: 20% off 44.00 € * Old price 55.00 € In stock Compare	Battery holder 3D Product no.: Battery holder 3D Battery holder case for the HP41 family of calculators, made with 3D printing and springs in stainless steel 304 alloy 30.00 € * Old price 35.00 € Not in stock (15) Compare
HP41c battery holder spring Product no.: Spring Stainless steel 304 springs for HP41C battery holder 3.00 € * In stock (11) Compare	Sponge for HP41c standard case Product no.: Esponja Sponge for the standard HP41c vinyl case 2.00 € * In stock (3) Compare	Piece for repair of back case of HP41C Product no.: brokenback 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. 17.00 € * In stock (10) Compare
New HP41c side cover Product no.: Side Cover HP41c side cover. Black Friday: 25% off 6.00 € * Old price 8.00 € In stock (15) Compare

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Calculator Types The HP41 Corner

The HP41 Corner

New Lower Post Repair part

New Upper Post Repair part

New HP41c side cover