Charger Specs for Rockwell 74k Calculator

[Zaphod]

(05-30-2018 01:05 PM)rprosperi Wrote:  Anyone know what the purpose of ELIMINATOR power mode is for? Initially I guessed it may be used to run the machine without batteries (thus eliminating the need for batteries)
Was/is this term commonly used on similar adapters?

Yes , it was ... (and yes it was to describe a battery eliminator - I.e. to use a product without batteries) I thought you guys already knew that...


The current output is not a lot on this particular unit and I would guess it’s probably slightly more than 7.5volts completely unloaded , when loaded with just the calc (no batteries fitted - 50mA load) it would drop to approx 7.5volts, with the extra load of a rechargeable battery installed (100mA load) it would drop down to 4.5volts (~the terminal voltage of the cells).

It’s possible it just has some series current limiting resistor internal to the adaptor.