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Alarm chirp with power on/off

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hmanvel

Joined: 05 Jul 2016
Posts: 3

Posted: Sat Feb 03, 2018 6:45 am Post subject: Alarm chirp with power on/off

I have been a stalker for many years and have not had a need to post a question until now.  My Rutan Defiant EAB has a simple master alarm circuit that uses 3 microswitches, throttle, canopy, and nosegear.  If anything is in the wrong position (canopy open with throttle, gear up with throttle back) an obnoxious 108 db alarm buzzes.  Here's my problem; lately when I turn on the master, I hear the alarm chirp very briefly.  And again when I turn off the master.  I have checked all wiring connections, grounds etc. and cannot find anything wrong.  Any thoughts on where to look next?  Could a failing microswitch somehow cause this?

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_________________
Harry Manvel
Defiant N2HM
PTK / Pontiac, MI

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