According to the parts manual, the rheostat part number was changed in the middle of the 1967 150G model year.
Early 150G's (prior to serial number 15066623) used p/n 0713247-200. Cessna shows this superseded by AY 0713247-201, at $2,139.30 (Yingling Aviation... not a misprint)!
Late 150G's used XR 6085, superseded by S-1880-2, at $278.85 (also Yingling Aviation).
I haven't found anything on specifications yet, but I'll check my avionics manuals.
I agree that most LED's don't work well on dimmer circuits. They are are either on or off.
That's crazy pricing, but just out of curiosity what difference would is make if I used the later model in place of the older one? Does nobody make a suitable replacement assembly?
