On 1/6/2011 2:55 PM, George & Jan wrote: > It is not critical at all - should be at least 10 times the microphone > impedance.
Actually, the current applicable IEC Standard DEFINES the impedance of a microphone as 5X its rated load impedance. And yes, a higher input Z is better -- the rated impedance is a minimum value. Most professional mics have an impedance of 150-250 ohms, and most pro mic inputs have an input impedance of at least 1K-1.5K ohms, and there are excellent technical reasons for values of 5K ohms or greater. 73, Jim Brown K9YC Member, AES Standards Committee and WG on Microphones ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
