There have been some warnings about plugging line cables into a mic power
plug on some MDs. 

Here is my problem. I measured the dc resistance of a Sony 957 mic that I
use with success on an Aiwa AM-F70. There is 100 ohms at the plug for each
channel. The EC mics that I built from RS elements have a dc resistance of
1K ohms.

I acquired a Denon (Sharp) MD that has mic power and I am reluctant to use
the Sony mic for fear of damage to the input circuitry. I thought that the
internal mic power circuitry was nothing more than a low voltage source
through a 1k or so isolation resistor, in other words, nothing but a bias
voltage for the condenser elements. In this case it would seem that there
should be no problem with almost any mic.

Or are the warnings really about applying line level signals to the mic
inputs and blowing the input circuitry as a result of the higher levels?

Inquiring minds want to know.

Grover Cleveland

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