The reason for the loss of audio is that there is a impedance mismatch.
Freemar sells an impdance matcher that will plug into the Roadie and the Aux
audio input in the audio panel (Garmin 340 in my case). I usually set the
Roadie audio output to 2 or 3 and have plenty of XM audio.

http://www.fremarllc.com/accessories/index.html

Aeromedix also sells a 28v to 6v cig plug adapter that will fit the Roadie.

http://www.aeromedix.com/index.php?_...3893f0567f32d9

The one from Radio Shack is cheaper. The Radio Shace catgalogue shows the
adapter to be 12 to 24v input and 6v output. It works just fine. I tried
both.

Mark Manes
N28409
WC5I


"Peter R." wrote in message
...
Jim Weir wrote:

Somebody said that they had used the cigarette lighter for power. Just
remember
that the little bugger needs SIX volts and that the regulator is in the
ciggie
lighter plug. Connect the Roadie directly to 12 volts and you have an
expensive
lump of silicon in your hand.

Whoa. Thank you, Jim, for the warning.

I powered it from a version of the GPS adapter panel, put a 6 volt
regulator on
the backside of the panel, the GPS antenna connector on the same panel,
and it
looks like a factory install.

As someone who only has the basics of electronic knowledge, I am
confused. The cigarette lighter plug shipped with the Roadie is not
designed to reduce the voltage to the correct six volts?

If not, what parts would I need (the GPS is an IFR-certified panel
mounted model) to power the Roadie in the aircraft? Is there an off-
the-shelf solution?

--
Peter