Avionics-List Digest Archive
Sun 07/08/07 |
Total Messages Posted: 1 |
Today's Message Index:
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1. 02:32 PM - PMA'd relays? (Doug McNutt)
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Time: 02:32:40 PM PST US
From: Doug McNutt <douglist@macnauchtan.com>
Subject: PMA'd relays?
I'm looking for a source of approved relays for a project I'm working on that will
need a field approval. The airplane is a Cessna 207 with a 12 volt system
and it's getting a 200 amp alternator and a 60 Hz 2.5 kW 60 Hz inverter.
What I need are a DPDT 14 volt relay and a DPDT 120 VAC relay that I can use to
get the switching logic I need to switch between ground and flight operations.
Actually I have space-qualified relays from Potter & Brumfield and Filtors Inc.
but they are no longer made and never had any kind of FAA certification - only
NASA and perhaps the USAF. They'll work fine but I can't document them for the
feds.
The transmit/receive relay from an old Narco COM11 is one option but they come
from the likes of Digi-Key and don't carry a PMA sticker unless you're Narco or
King.
Any ideas?
--
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