Owner's manual

OPERATIONAL NOTES
TRIODE / TETRODE OPERATION:
With the TRIODE / TETRODE switch, the amplifier may be set for TRIODE or
TETRODE operation. When the switch is in the lower position, the amplifier is in
TETRODE mode which will produce well over 100 watts. When the switch is in the upper
position, the amplifier is in TRIODE mode which will produce half the power of
TETRODE operation but as fans of triodes know, nothing can match that sweet seductive
sound of triodes! For some more demanding energetic music, large rooms, or for power
hungry inefficient loadspeakers, you might find you will need the extra power of tetrode
operation. Other times and other situations will find you very well satisfied with the triode
mode. One major rule applies for switching between triode and tetrode:
THE AMPLIFIER MUST BE TURNED OFF BEFORE
SWITCHING BETWEEN TRIODE AND TETRODE!!!!
AC BALANCE
The AC balance control is factory preset for balance between the negative and positive
phases of the driver / phase splitter circuit. Even if you have re-tubed your amplifier, there
should be no need to adjust this control if you use the same type and brand of driver tube.
To adjust this control properly an oscillator, scope, AC voltmeter, and optionally a
distortion measurement system are required. Therefore, if you do not have these items on
hand and know how to operate them, we suggest you do not alter the setting on this
control.
TUBE LIFE
You should expect extended life from the tubes in your MANLEY 100 if you adhere to the
procedures described above and check your bias at least once every 2-3 months. We stock
all the tubes in these amplifiers should you ever need replacements (and at very reasonable
prices too!)
FUSES
The fuses used in your amplifier are standard 1/4" x 1 1/4" SLO-BLO types. The correctly
rated fuse has been installed at the factory for your country's voltage. If replacing a fuse,
always unplug the amplifier's power cord from the wall outlet and always use the exact
same type and ampere rating fuse as the one you are replacing. Failure to do so will void
your warranty and can be a dangerous fire hazard. NEVER replace a fuse with thick wire,
tin foil, gum wrappers, or anything else other than the correct fuse!