ABOUT US
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ABOUT US |
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CARBON |
ELECTRET |
MILITARY DYNAMICS |
| The photo above is an example of a military carbon microphone designed to mount on headset or military helmet microphone booms. I don't think you will see many of these around today as they have been replaced with far better devices. They are in principal the same as the Telex hand mics used in G.A. aircraft in the 60's & 70's and yes they will work in your G.A. aircraft today without the need for a in-line amp. |
Above is an example of a electret microphone element, shown without its outer packaging, it is about 10mm in diameter and 8mm high which is considered large for an electret element. Most electrets would be smaller than the one shown. It is there small size and light weight along with there fairly high electrical output that makes them ideal for mounting on the booms of headsets. |
The two microphones at above are [left] M-87/AIC and [right] M-101/AIC. Because we in Australia seem to draw more from the USA than Europe for our aviation parts, these are the sort of dynamic microphones you are most likely to come across. They are military in origin and are not suitable for use in G.A. aircraft or helicopters, unless they are amplified. Both the M-87 and the M-101 are available in 5, 75, 150 and 300 ohm's. |
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AMPLIFIED ELECTRET |
AMPLIFIED DYNAMIC |
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| Above are two examples of Amplified electret microphones. They contain a 2000 ohm electret mic element with a small amplifier to increase the output to suit a G.A. aircraft. The amplifier is powered by a DC bias voltage superimposed on the mic audio line. |
Above is the good old David Clark M-1 Amplified dynamic. This contains a 150 ohm dynamic mic insert with a small amplifier to increase the output to suit a G.A. aircraft. The amplifier is powered by a DC bias voltage superimposed on the mic audio line. |
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