Fuse replacement
. Do not just replace a blown fuse if you do not know why it blew out. It is
important to know the reason.
The fuse holder is a small drawer above the mains connector. Pull out that drawer and you’ll see two
fuses. One is a spare fuse, one is the fuse used. The fuse used is the one that goes in deepest. If the
blown out fuse is broken into glass pieces, you made a very bad short circuit, like put in a tube in the
wrong position. After replacing the fuse, look at the white switch lamp when switching on. If it
lights only very short, the fuse blew out again, and in this case the amplifier needs to be repaired.
Switch on:
.
The A08-S may only be switched on with the Speakers connected and with the inputs connected, and
all tubes inserted. (Exception 717A tubes, read next part below).
When switching on, observe if the meter reaches approximately 32mA for both channels. Otherwise,
switch off and clear this first. Do not experiment if the 45 tubes bias not at expected. It is normal if
there is some overshoot of the Bias current immediately after switch on, for 0.5 to 1 second. After this
bias must move towards the final value.
When switching on, observe if the meter
reaches approximately 32mA for both
channels. If much higher or much lower,
switch off and clear this first. Do not
experiment if the 45 tubes bias is not at
expected.
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