I wrote:
"I think that a technically
correct generic name for the 'Pin 1 Problem' would be unwanted 'Common
Impedance Coupling', and a bit of a search shows that this term has been quite
frequently used."
Jim Brown wrote:
"No, it is NOT the correct description."
Jim Brown presented a paper to the AES Convention in October 2003 entitled:
"Testing for Radio-Frequency CommonImpedance Coupling (the "Pin 1 Problem")
inMicrophones and Other Audio Equipment."
I guess that must have been some other Jim Brown.
Of course, not every case of unwanted common impedance coupling is a 'Pin 1'
problem, but every 'Pin 1' problem is a case of unwanted common impedance
coupling. A search will show that Jim is far from alone in the audio world in
equating the two.
73 Roger
VE3ZI
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