[volt-nuts] HP 419 (WAS: Fluke 335A versus HP 740B)

[Jean-Louis Noel]

Hi Peter,

From: "Peter Loron" <peterl at standingwave.org>

> Obviously you should not use any built in charging circuit that is not designed for use with
> the chemistry of the new cells. 

Obviously the old HP circuit is not designed to feed lithium batteries as MK proposed.
I use three 9V batteries in serial with the battery in the middle transformed.
You remove 1 element and connect a wire in the middle.

http://www.stben.net/hp/DSCN0644.JPG
http://www.stben.net/hp/DSCN0645.JPG
http://www.stben.net/hp/DSCN0646.JPG
http://www.stben.net/hp/DSCN0647.JPG
http://www.stben.net/hp/DSCN0648.JPG
http://www.stben.net/hp/DSCN0649.JPG
http://www.stben.net/hp/DSCN0650.JPG

Bye,
Jean-Louis