Another great adventure with S-Tec..  Looking for an Altitude Transducer Part #0111.  After a couple of times sending the controller (S-Tec 50) back to replace a Pico Fuse at $150 per..( Had to be a short in  the wiring harness they kept saying, so replaced harness, the system still would not hold an altittude. This whole thing has gone on for several months.. Finally, today I read the resistance values of the Altitude Transducer itself and olah !!! factory then admitted that that was my problem,  I should have done it sooner, but not being a avionics wizard..Whine     Factory wants over a Grand for a new one, no repairs.  Same deal with their servos, as they age the motors tend to get into a "groove"  , buy  a new one or for about $800 they will install a new motor ..  Wa a pretty good system to start with, BUT...
   I post all this whining for those of you still considering an A/P purchase.. Anyway, any of you good people with a reasonable source, I would appreciate a call   Don Skeele  850-626-4946  N320J