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FEEDBACK SWITCH
The small switch mounted on the top front of the chassis controls the amount of negative feedback.
When the toggle handle is pushed LEFT (classic), the feedback is approximately 20 dB, a value used by
most vintage amplifier designers and is my personal preference. When toggled RIGHT (contemporary),
feedback is limited to about 11 dB. This represents the practice of many modern day designers. Please try
it both and make your own determination based on your listening experience and your speakers.
VOLUME CONTROL
Under normal circumstances, this control should be left in the maximum (fully clockwise) position. If
you have a noisy preamp, turning it halfway down and centering it at the 12:00 o'clock position will
reduce the preamp noise by half, or 6 dB. It should always be turned all the way down when
connecting or disconnecting any input or output in your system. The RCA audio input jack should be
used to feed the signal into the amplifier from your signal source.
REAR PANEL CONNECTIONS
FUSES
The rear panel IEC socket fuse is a 6 amp fast blow fuse, and should be replaced with the same type
and rating if it ever needs replacing. The vacuum tube cathode fuse is a 1.5 amp fast blow and should
be replaced with the same type.
Do not under any circumstances use "slow-blo" fuses. Both fuses are
fast blow fuses.
