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Copyright
2008 FiveFish Studios
www.fivefishstudios.com
SC-1mk2 Microphone Preamp Kit
All of the electrolytic capacitors used in the SC-1mk2 preamp have polarity, except the (2) blue electrolytic
capacitors. 10uf 50V NP, shown on the picture on the right. These (2) electrolytic capacitors, labeled C12 and
C13, are Non-Polarized, so it does not matter how you insert them. But the rest of the capacitors in the SC-1mk2
kit should be inserted in the proper polarity.
Diodes
Diodes are semiconductor devices that permit current flow only in one direction. Think of it as a one-way valve.
The SC-1mk2 preamp kit uses 3 different kinds of diodes.
1.
The first type of diode we’re using is the ZENER DIODE. These zener diodes are used as input protection to the mic
preamp circuitry. You can find the zener diodes in the locations shown on the photo to your right.
[insert photo
here…]
PLEASE NOTE
: Even though the SC-1mk2 preamp uses input protection, please turn OFF phantom power, and wait a few
seconds (5-10 seconds) before unplugging your microphone. Also, do not plug a mic while phantom power is ON. If you’re
using the SC-1mk2 with TRS jacks connected to a patch bay or another gear, do not turn ON phantom power… NEVER, EVER
plug a jack into a patchbay with Phantom Power turned ON. You risk of damaging any gear connected at the other end of
the patch bay and may even possibly damage your preamp. In short, turn OFF phantom power before
connecting/disconnecting the microphone and/or jack. It takes only a few seconds to do this. Don’t risk damaging your
gear.
2.
The second type of diode we’re using is the SIGNAL DIODE. They look almost exactly like the Zener diodes. Nothing to
worry about, I packed the Signal Diode in a separate Zip bag for easy identification.
