REFLECTOR:Do you have waving needles or changing numbers on your gauges

[Jim Agnew]

This is a little heads up FYI.

If your gauges (e.g., pressure, temperature, quantity)
change when you turn on your strobes, boost pump, etc. then
check your senders.  If they are single wire (i.e.,
grounded by their mounting) or two wire where the ground is
local to the sender then you have created a ground loop.  

There is a simple cure (maybe); the gauge ground and the
sender ground should be at the same point.  This could be a
headache with single wire senders so I would avoid them
unless the gauge maker guarantees they will work and be
stable.

Jim



=====
James F. Agnew
Jim_Agnew_2@Yahoo.Com
Tampa, FL
Velocity 173 Elite Aircraft Completed