Matt Dralle
Site Admin
Joined: 08 Nov 2005
Posts: 25781
Location: Livermore CA USA
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 Posted: Sat Jul 09, 2011 5:41 pm Post subject: Bose A20 Headset - NR Power Button - Panel Power |
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Dear Listers,
I bought a couple pairs of the new Bose A20's for the RV-8 and they are very nice. NR is better than the Bose X's and they seem to fit my head a little better too.
But I quickly discovered that with the A20's you now have to hit the NR Power button *every time* you start the aircraft even if you have them panel powered. The older Bose X headsets have a slide switch for the NR power and so you can just put the slide switch in the On position and not worry about it.
I really didn't like having to turn the NR on all the time and having to remind my passengers about it, so I came up with a modification that will automatically turn the NR on when panel power is applied. Its pretty simple, but requires some special tools. Its completely self-contained inside the Control Module and works great. The modification is generally only for installations that are panel-powered, but you could do the modification to a unit that is normally battery powered with no adverse effect. With the modification, the NR Power button will work normally in battery power installations.
I created web page on the procedure including step-by-step photos and instructions. Feedback is welcome.
http://www.matronics.com/BoseA20AutoOnModification/
Matt
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Matt Dralle
RV-8 #82880 N998RV "Ruby Vixen"
http://www.mattsrv8.com - Matt's Complete RV-8 Construction Log
http://www.mattsrv8.com/Mishap - Landing Mishap Rebuild Log
http://www.youtube.com/MattsRV8 - Matt's RV-8 HDTV YouTube Channel
Status: 170+ Hours TTSN - Rebuilding Fuselage After Landing Mishap...
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