On 2006-03-31, Nobody wrote:
I would like to record, from the intercom system of a typical GA plane
(Cessna), to an off the shelf digital audio recorder. The question is, how
do I go from the intercom system to the 'Mic' jack of the recorder....

The right way to do it would be some kind of impedance matching
thingamajig.

The quick and dirty way of doing it is by going to somewhere like Rat
Shack, get a 1/4 inch jack, some cable, and the right jack for the
recorder (probably 1/8th inch). Put a 470K ohm resistor inline. That
seems to attenuate the output level of the intercom such that it will
work with a Sony Digital 8 video camera. It's worked very well for me
(the resistor lives inside the 1/4 inch jack that plugs into the headset
connector on the intercom).

--
Dylan Smith, Port St Mary, Isle of Man
Flying: http://www.dylansmith.net
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