OPERATION
Your new SLP 98 is ready for operation after all the tubes and interconnect cables have been
installed. The SLP 98 is provided with functional, useful front panel controls with a logical
layout. The listening level is conveniently located in the center. Connect the SLP 98 to the
power pack with the custom power transfer cable. Plug AC mains into the power pack and flip
the power switch up. The output of the SLP 98 is inverting. Connect your speaker wire out of
phase ( (+) to (-) and (-) to (+) ) on both channels.
Power Switch
The power switch located at the far left on the SLP 98 front panel functions in the following
manner:
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OFF
Removes all AC voltages from the SLP 98 preamp deck.
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STAND-BY
Provides DC voltage through individual regulators to flow to the
filaments of the preamplifier stage. (The SLP 98 may be left in the
stand-by position at all times to keep the SLP 98 in a warmed-up,
ready- to operate mode without B+ potential. Operating in this
fashion gives peak performance after only a few minutes of
operating time).
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OPERATE
Brings up full potential DC voltage within one minute.
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Selector Switch
The 5-position rotary switch connects a choice of input program source, both channels
simultaneously with proper amplification (or in the case of phono) RIAA equalization for phono
input. All program sources are selected by this switch.
Operate Mode
To listen to music the operate switch must be in the UP position; when the switch is DOWN the
output is muted.
Monitor Tape
In the “Up” position, the rear monitor jack serves as the input source. This fu
nction is very
useful with tape decks utilizing a third head to monitor the recording directly from the tape. In
the “Up” position, the blue
LED indicator light will appear.
Listening Level
The gain of both left and right channels is controlled simultaneously by this control. The control
potentiometer is of such high quality that the tracking error is less than 0.5dB from 0 to -60dB.
The program source remains in balance over the entire range of this control. The taper rate of
the volume control has been chosen to provide a slow increase in gain over the first half of
rotation and a more rapid gain increase above 12:00.
Input Level - Right and Left
The two potentiometers control independently the input level to each channel of the SLP 98.
The input level controls on a SLP 98 take the place of an individual dual balance control used
on many preamplifiers. Also, these controls may be used to reduce the overall gain of each
channel on the SLP 98.
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