HP-41 and Hepax Filesystem

[Guenter Schink]

(02-07-2020 05:55 PM)pablo2000 Wrote:  

(02-07-2020 04:25 PM)mfleming Wrote:  Quite intriguing! But how did you manage the connection to the 41 bus? Even the MLDL2000 and similar projects required a recycled connector. Wish I had an answer to your header question!

Well I had to engineer a new connector. The main PCB runs almost 2/3 of the length of the 'nose'. Then there's phosphour-bronze fingers that I had stamped in China which are tipped with gold contacts - all soldered together during the reflow process. The physical support - the black plastic block of the old connectors - is built into the lower case half and 'nose' cover. The case is in three pieces: bottom, main top and connector top.

There aren't enough old modules kicking around to cannibalize, just to extract an already 30-40 year old part from.

This should be subject to a great presentation at the next HHC!

Günter