At 02:32 PM 8/31/2009, Rocket J Squirrel wrote:
>So I gotta question: someone mentioned last week that buried in the
>archives is a description of how to clean the contacts in the tank. Mine
>appear bright shiny and clean. Should cleaning would make any difference?

I suggest green Scotch-Brite, and scrub really well.  You know the
difference between a clean bathroom and one that was cleaned an hour
ago?  That's what you're looking for.  The input impedance of this
circuit is one megohm, which is why the whole thing is such a PIA.

>If bright contacts are considered good contacts, then I have two choices
>if I want the lamps to do anything useful: Modify the circuitry to operate
>with less current by using op-amps with higher input impedances, lower
>input current; and increase the values of the voltage divider resistors --

See above...

>David Beierl knows what I'm talking about.

Occasionally... :-)

Cheers
d

  --
David Beierl - Providence RI USA -- http://pws.prserv.net/synergy/Vanagon/
'89 Po' White Star "Scamp"