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You may have to check the audio to ground wire pins at the mic socket to be sure - but it should be ok if it can use a Dynamic element.

Some Speech processor mike's as of late, use a Electret Confessor element - requires power from the radio to work.

So to be safe and sure, check the radios sides' mic connector - from the Audio line to Ground with a DVM set to read voltage 20V or so, to see if you get a reading, if you do, then the mic element in that K40 handset is Electret type, and so it BOOSTS audio signal to the speech processor IC inside - which may require you to change the mic element from Dynamic to Electret because he IC requires more power than a typical Dynamic element would provide.

[QUOTE="Handy Andy, post: 739976, member: 52309"] You may have to check the audio to ground wire pins at the mic socket to be sure - but it should be ok if it can use a Dynamic element. Some Speech processor mike's as of late, use a Electret Confessor element - requires power from the radio to work. So to be safe and sure, check the radios sides' mic connector - from the Audio line to Ground with a DVM set to read voltage 20V or so, to see if you get a reading, if you do, then the mic element in that K40 handset is Electret type, and so it BOOSTS audio signal to the speech processor IC inside - which may require you to change the mic element from Dynamic to Electret because he IC requires more power than a typical Dynamic element would provide. [/QUOTE]

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