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POWER two-way toggle switch powers the OTS on and off. With the toggle switch in the UP position, the OTS is ON. In the
DOWN position, the OTS is OFF.
STANDBY applies high voltage to the vacuum tube anodes (and screen grids) during use of the OTS. To ensure long tube life,
first power the unit on with the toggle switch in STANDBY position for approximately 30 seconds. Then place switch upward to
ON position to use the OTS. With the toggle switch in the UP position, the OTS is in operate mode. In the DOWN position, the
OTS is in standby mode.
INDICATOR will illuminate when the OTS is powered by turning the rear panel MAINS toggle switch to the ON position. If
INDICATOR does not turn on, check your power cable connections, and then the 2A slow-blow fuse on the rear of the unit.
PRESENCE adjusts the high frequency response of the power amplifier using negative feedback. Use this control to add
sparkle and clarity to your tone.
MASTER sets the overall volume of your amplifier.
RATIO serves a sort of volume control for the overdrive channel. However, just like this version of the original amplifier, there
are not individual master volume controls for the clean and overdrive channels. Instead, the RATIO control serves to balance
out the volume of the overdrive channel with the clean channel.
LEVEL adjusts the amount of gain, and in turn distortion in the overdrive mode.
BASS adjusts low frequencies in your amplifier for both clean and overdrive modes.
MIDRANGE adjusts the mid frequency response for both clean and overdrive modes.
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