Looking from the front of the amplifier install the 300B valves first.
Inspect a 300B valve base and you will notice that two of the pins are larger than the
other two. This is to help ensure that the valve can only be inserted one way.
(1) The larger pins must face each other when fitted to their valve bases on the central
board.
(2) The sticker on the valve base must also line up with the sticker on the central circuit
board., ie., A to A, B to B etc., or 1 to 1, 2 to 2. and so on.
(3) Also note the diagram on the output transformer also showing correct way of fitting.
Please make sure that both (1), (2) and (3) are correct and with gentle but firm pressure
insert the valve into its socket.
Check again that all valves are fully inserted in the correct way to their respective valve
sockets.
Looking from the front of the amplifier, the next valve to plug in is the 5U4G valve
which goes into the last empty valve base on the right front board.
Locate the rib or pip on the central pin on the bottom center of the valve and align with
the valve base (the locating pin can only go in one way round due to a locating rib) and
with gentle but firm pressure insert the valve.
Check again that all valves are correctly fitted and the top cover may now be
replaced.
Installation
Select a suitable location for the unit ensuring that adequate ventilation clearance is
provided allowing at least 30cm. of space above the unit. This is an important
consideration as the amplifier generates substantial heat during normal operation. Be sure
not to install the amplifier into a cabinet with restricted air flow or onto a thick pile
carpet.
In the interest of safe, reliable operation situate the amplifier away from dampness or
direct sunlight. Site the unit on a flat and firm surface capable of sustaining the amplifiers
weight. Worthwhile sonic improvements may be obtained by locating the amplifier on a
purposely designed audio support system.
CONNECTIONS – Inputs
Phono Inputs - The phono inputs are designed for use with the majority of MM (moving
magnet) type cartridges. MM cartridges typically have an output from 2.5mV to 10mV.
Connect the Right and Left outputs from your turntable to the respective phono inputs.
Some turntables have a separate ground wire. This should be connected to the main
ground terminal on the back of the Meishu.
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