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Old ribbon mic rewiring question
Old 4 weeks ago
  #1
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Old ribbon mic rewiring question

Hello,

I have this old ribbon mic and there is a lot of hiss when it is plugged in. It generally goes away when a clouidlifter is used before the pre. I know the mic is inherently low output but I’m wondering if I messed up the wiring. The the screw-in DIN Femalr output of the mic used have a TS connector but that was changed to XLR Male (so there’s a tiny cable with a DIN M and XLR M). The wiring is confusing to me since I’m not familiar with how the cables from the transformer should be wired to the DIN and then what pins connect to the XLR at the end.

Any thoughts?
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Old 4 weeks ago
  #2
Lives for gear
If the output level is the same both ways (and it’s not lower his just because it’s softer), suspect improper termination of the transformer. Most trannies want to see an impedance slightly hurt but close to the design value. Too little load can cause a HF boost.

If you don’t know the transformer’s color code, try ringing it out with an ohmmeter... but put a resistor in series, so you’re not shocking the ribbon with too much DC from the meter. Or better, use a sensitive AC meter or scope.
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