Brent fired this volley in
:


Second to that a few IC's and a few circuits on the web would easily
make a 6v regulator that owuld happily feed the instrumentation with a
few amps of power if the instrumentation needs that much.

I think a single Power op amp can do it easily and quickly in fact


Oh, come on! A 78H05 and one 1.3v zener diode would do it (or two
ordinary silicon diodes in series, and forward biased). For this simple
an application, any-ol NPN power darlington and a 6.8v zener would work,
too.

LLoyd