Jim Johnson

Correction. Programming pin spacing is 2.00 mm. (not 0.20 mm).

True, Digi-key has 6-pin pogo pin connectors, and they are the correct 0.20 mm spacing between pins. But then you need to wire up the reset and erase switches and a DB-9 connector to connect to a serial-to-USB interface. Or you need to add the serial-to-USB interface to the cable assembly. It's probably easier (and a lot cheaper) to send me your HP-30b and let me program it with the WP-34S firmware, assuming that's what you want. If you would like to send me your HP-30b, contact me at: jjohnson873@hotmail.com...

The original cables were a custom build. Not sure if the six position, spring pin connector exists.