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41-608 bol
codefox1
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Posts: 2,128
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#5

08-12-2013, 11:53 AM
Dunno about that, but a small PM speaker makes a very good microphone, just use an output transformer in reverse. Done all the times in old time intercoms. In fact they sometimes used 45 ohm PM speakers to minimize losses in wiring from remotes to masters. Dunno about modern ones though.
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Messages In This Thread
41-608 bol - by sam - 08-11-2013, 01:35 PM
RE: 41-608 bol - by Bill Kinghorn - 08-11-2013, 06:39 PM
RE: 41-608 bol - by Bill Kinghorn - 08-11-2013, 06:43 PM
RE: 41-608 bol - by Electrothaumaturgist - 08-11-2013, 07:02 PM
RE: 41-608 bol - by codefox1 - 08-12-2013, 11:53 AM
RE: 41-608 bol - by sam - 08-12-2013, 12:29 PM



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