Tube Replacement
Tube life varies depending upon playing style and application. Power tubes have a much
shorter life than pre-amp tubes which can last for years.
To maintain the optimum performance of your amplifier, the tubes should only be replaced
with the same type tubes as specified on the tube illustration below.
When changing tubes, ALWAYS unplug the amplifier and remember that the
TUBES ARE HOT! wait for the tubes to cool or replace tubes when amplifier has not been
used for several hours.
Your amplifier has 5 valves, three pre-amp valves 12AX7 or ECC83,and the phase splitter
is a 12AT7 ECC81, there are also two power valves 5881.
Valve Failure.
When a valve breaks down its internal elements can short. This can cause major
damage to the internal components of the amplifier and also be a possible fire risk.
There are two fuses that will break under fault conditions. The fuse mounted on the back
panel and their are others in the chassis remember to replace the fuses with the same
type and rating.
Remember we are always happy to assist in anyway we can so please do not
hesitate to contact us.
Chassis Valve Line up
Mains
Transformer
Output
Transformer
5881
5881
ECC83
ECC83
Front panel
CAUTION CHASSIS SERVICE HOT
P.5
ECC81
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