Hi jeremynothman !
It was indeed a very long thread where I helped
@Emmathom identify the problems with a faulty SC-1100 and repair/modify it. Because the result was beyond expectations, he decided to make a pair and modified a second one in perfect working order.
In comparative tests with other microphones, including STAM SA-47fet, Oktava 012, WarmAudio WA-84, SE X1S, etc., the SC-1100mod microphone was preferred. In parallel with the very long, public group thread, there was also a very long and intense private conversation with many tests.
The defect was identified as a short circuit between the turns of the transformer secondary. This stock has around a 2:1 ratio.
It was replaced with a 1.5:1 ratio transformer, is what he managed to achieve.
In addition, the 'castration' resistor
has been shorted - R10(3k) , R9 was replaced with a trimpot and the jFET was reBIASed.
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The stock microphone provides a very high output level.
The changes made it even more sensitive, (probably by about 10dB more). It became the loudest I've heard.
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The Lo-Cut switch in your case is necessary, because if you use it for kick-drum you must have a frequency response to the bass in the style of U47fet (which is notorious for kick-drum use)
Compare the two FRs. (Blue refers to the proximity effect)
You've probably tested the microphone on voice that don't have the massive bass of a kick-drum, (and SPL ! ), plus the capsule is probably compromised.
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As I said the microphone is loud, so you need to attenuate at least 20dB
IIRC
@kingkorg in the case of a snare measured an incredible level of 20-22V peak-to-peak!
The good news is that you can reduce its sensitivity.
There would be several ways to do this
It depends on your abilities, skills, preferences.