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GA to 8ohm Headphone Adapter Completed



 
 
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Old November 19th 05, 01:27 PM posted to rec.aviation.homebuilt
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Default GA to 8ohm Headphone Adapter Completed

On Fri, 18 Nov 2005 20:45:27 -0600, Charlie
wrote:

Instead of paying $75 - $150 for an adapter, I constructed
what is the equivalent of 500 ohm source impedance to
4 ohm (actually, 2 8-ohm earbuds in parallel) adapter.


Is your intercom/radio capable of enough signal level (voltage, not
current) to compensate for the ~100-1 stepdown in voltage?


he has ~100:1 impedence ratio ... that will be about a 10:1 turns
ratio ... impedence in an n^2 relationship.

Question is still valid, though. The POWER, less efficiency, will be
the same, so 1mW at (say 400 ohm) will be 1mW at 4 ohm. So if the
sensitivity of the transducer elements is the same, same SPL.
 




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GA to 8ohm Headphone Adapter Completed Gary G General Aviation 4 November 22nd 05 03:03 AM


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