REFLECTOR: Elevator trim problem

[Carl Hoffman]

John Dibble wrote:

>While we're on this subject, I need help with an issue with my elevator
>trim.  Over the past 100 hours, infrequently it seems to trim up
>uncommanded.  I push forward on the stick to keep level and push the
>trim down button.  For a second or two nothing happens.  Then it
>responds properly.  I know if I press both buttons at once, nothing
>happens, so I'm guessing that there is still an up input in the second
>or two when nothing happens.  I have a solid state relay that failed
>once.  In that case the output voltage reduced to where the motor
>wouldn't run.  I have a Mac 7 stick.  On the ground the buttons operate
>well with no sign of sticking.  I have several questions.
>
>Where is the mechanism that prevents operation when both buttons are
>pressed?  In the stick?  In the relay?  In the motor?
>
>Can I eliminate the relay and run full current through the stick?
>  
>
I've been running full current through a MAC stick for 11 1/2 years with 
no problem.

>I may wire lights to the leads going to the motor so I can confirm when
>current is being sent to the motor.
>
>Thanks,
>
>John
>
>
>  
>