fobjob said:
Ah, but if it has no connection to aircraft power, AND it has an internal GPS receiver, it probably does NOT transmit your position to the satellite on the first transmission. (While you are still crashing) The gps has to be powered
up, then the position is sent on the second transmission a minute or so later, after the airframe has had a chance to :
a. roll over on the antenna
b. burn up...
c. sink...
Ah, yes...
Apparently, ALL 406 thingies have a 50 second delay, thus share this drawback.
They TX 121 immediately but delay the 406 TX to prevent unneeded anxiety to the monitoring SAR folks. Also, if NOT connected to aircraft power, the internal GPS needs to flash up & get a fix (via the int. battery) before it can TX your GPS location. I want it monitoring my position all the time so I'll connect it to 12V via the remote switch.
I asked about availability etc, and got this back from PointerAvionics(dot com)
Hi Logan,
The expected release is spring (April/May). The GPS section will need to be powered from the “Aircraft Buss” so if you want to run an extra conductor to the cockpit to pickup “Buss” power or find available “Buss” power closer to the ELT and bring it in through the remote connector as well you can either way. You are correct that if you want to use the GPS while in flight you should have the gps section powered in one of the ways discussed above so it does not drain the battery.
Regards,
Pat
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From: Logan & Mary [mailto:logan@xplornet.com]
Sent: Friday, January 16, 2009 7:45 PM
To: Sales
Subject: When?
Howdy,
I reckon I'll need a new 406 ELT soon. I understand that demand will exceed supply for a while, so I wonder how long it will be before I can get one. Just finishing up rebuilding my SuperCub & plan to put the remote switch in the wing root. I see where the remote switch doesn't need aircraft power, but I thought it needed it to keep the GPS Rx working... it can't just run off the battery, can it? The GPS feature is the reason I want one of yours!!
Please advise.
Thanks, Logan (in the boonies of BC)