[TR] Thanks & follow-up - Spit bodied GT6 fuel gage issues

[aribert neumann]

First thanks to Dave & Dave for the guess and confirmation that 67 ohm is
in the ball park for the sending unit.

Joel - thank you for the very informative fuel/temp gauge calibration
sheet.  Looking closely at my Smiths gauges, there are double dots at the
low, the midpoint and high - slight graphic variation but easy enough to
work with.   I swapped the leads from the fuel to the temp gauge and now
the temp gauge reads beyond full scale - that was a surprise!  Leads me to
believe that I do not have a gauge problem.   I was going to double check
the voltage at the gauge and sending unit.  I did not realise that I did
not have an analog voltmeter at home (could have brought one home from my
workshop garage today).   It is starting to look like a wiring or voltage
supply problem (even though the water temp gauge reads normal).

Thinking out loud - I don't have a variable DC voltage device.  If I were
to plug a DC output transformer (wall-wart, have plenty of those) into an
AC variac (have) I should be able to dial in a desired DC output voltage -
yes?
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