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| STC 4136 microphone |
A long time ago I posted about the STC 4136 condenser microphone and how to modify it to work on standard 48V phantom power, using a small circuit built on perfboard.
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I had another opportunity to work on one of these microphones. This one was a challenge as it had no circuit inside at all, just the capsule and bodywork, although that also gave free scope to start from scratch.
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Space is tight in this microphone, but with a careful layout and small components everything will fit neatly. My solution for this one was to fit a small KM84 circuit and Neutrik NTE10/3 transformer. This transformer performs well, does not break the bank, and can be squeezed into tiny spaces where nothing else will go.
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| New circuit board and transformer |
This time I commissioned a printed circuit board rather than working on perfboard, which does save time and look more professional. The board will be useful for other projects too – I have a handful of other small microphones which would benefit from updated, lower noise circuits.
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| Made in England |
Thanks to Robert at Russell Technologies for the board layout and advice.