PPRuNe Forums - View Single Post - Bose A20 high/low imp vs. separate Impedance converter
Old 21st Mar 2013, 14:00
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hueyracer
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I´d just jump on to that with my questions...

I fly both-(ex)military and civil helicopters....

I have the Bose Aviation X with (i guess by the shape of it) an electret microfone.

How do i get it to work in both helicopters?
Just changing the mike (as suggested above)?
Where do i get the mike, what´s the part number?

Wouldn´t it (theoretically) be possible to install a "low/high impedance" switch (as one of the DC´s seem to have)....?
As far as i understand, the difference in impedance is a difference in resistance-right?

To answer some of my own questions:

Here is a low impedance cord:
Bose X Military Coiled Cord Cable - 5 ohm mic - U/174U Plug - Marv Golden Pilot Supplies
But this one is for "dynamic" microfones...so where do i get a Bose Aviation X dynamic microfone?

I think the best way would be just to alter my headset to military standard (low impedance cord and dynamic microfone), and then use this adapter:
Low to High Impedance Adapter (Helicopter) - MyPilotStore.com

The other way arouns, the adapter needs a battery (unreliable in my opinion)....
Any comments?

Last edited by hueyracer; 21st Mar 2013 at 14:21.