Balanced Audio REX II Preamplifier - Manual (Page 6)

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Please consult the factory regarding options for other tube types that may be available in the future.
WARNING:
The following procedure should only be performed by qualified personnel
To change the current source:
1. Turn the unit OFF and wait at least 5 minutes to allow the tubes to cool down and the power
supply charge to dissipate. Remove the Power Module top cover.
2. Remove the six screws holding each current source board.
3. Pull the current source boards straight up to disengage its connectors.
4. Install the new current source boards making sure their connectors are properly aligned. Boards
will be positioned properly when the mounting holes in the circuit boards align with the standoffs.
5. Install the six mounting screws.
6. Turn the unit ON.
AC SHUNT VOLTAGE REGULATORS
The REX II preamplifier incorporates another feature that allows the user to optimize its sound – the
AC Shunt voltage regulators.
The AC Shunt voltage regulators perform the final “cleaning” of the REX II power supply rails.
They work to reduce the minute fluctuations in the DC voltages that may degrade the sound.
The AC Shunt Voltage Regulators are located in the REX II Power Module.