Power On/Off Indicators and Fuse
The Stereo 160 Power On/Off indicator is either the Ultralinear (red) lamp or the Triode (amber) lamp.
The lamp which is lit when the Power On/Off switch is turned on will depend upon the Triode/Ultralinear
switch position.
During the first minute or so after the Stereo 160 is first switched on, all four output tube bias indicator
lamps glow green. As the unit warms up, these lamps should go off, indicating the unit is ready for use.
If the bias indicator lamps remain green (or turn red) after the initial warm-up period, a low or high AC
line voltage condition may be indicated. The AC line voltage varies from country to country, city to city,
house to house, and even the time of day in many locations. It can also be affected by common
appliances such as electric heaters, microwave ovens, clothes dryers, etc. Therefore, you may need to set
the output tube bias adjustments to suit your own location. (See section entitled Bias Adjustments -
general.)
Fuses
AC Line Fuse (F1):
10 Amp Fast-Blow - 100 or 120VAC
5 Amp Fast-Blow - 220 or 240VAC
To remove the AC line fuse, use a small screwdriver to
push forward the tab near the center of the Power
Entry Module.
Output Protection (F2, F3):
1/2 Amp Fast-Blow (regardless of line voltage)
F2 (left channel) and F3 (right channel) protect the Output Transformers from damage due to a possible
shorted output tube. If either output tube in one channel shorts, the fuse for that channel will blow.
Although shorted output tubes should be considered rare, the fuse elements themselves become brittle
with age and sometimes fail under normal use. Always keep spare fuses for your Stereo 160 at hand.
Always remove the power cord when accessing the AC line fuse.
6
PUSH TAB TO RELEASE FUSE HOLDER
120
120
120
120
