Mike Input Impedance

[Scott Connop <>]

John and Walt, thanks for a great evaluation of Hhb performance. This is
meat and potatoes stuff for all of us, but especially the birders. John,
is there any kind of impedance mismatch between the Senn 67 and the
input on the Hhb? I was never a believer in the Mineroff pre-amps
because of their noise level. I solved the problem by using a matching
transformer between the TCM-5000 and a Senn 88. When the Senn 66 became
available, I found that the transformer wasn't necessary any more
because the mike impedance of the 66 was much lower than the 88 (I
believe that the difference was 150 vs. 200 ohms as opposed to 150 vs.
300 before). Your thoughts?

Scott Connop



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