Anacon TUBEWONDER, Руководство пользователя

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© 2006 ANACON Technology
RECOMMENDED BIAS RANGE IS 25-35 FOR EL34, 6L6 & 7591A
POWER TUBES.
When do you need to check/adjust bias?
Your Tubewonder was properly adjusted at time of final test with nominal
mains voltage and should not need any adjustments. It has also been
checked by your dealer who installed the tubes upon delivery. The amp was
delivered with the tubes that were used during final test and burn-in.
We recommend checking/adjusting bias after ca 200hrs of use or when
replacing the power tubes.
You will need to readjust the bias when changing to/from Tube Rectifier
from/to Silicon (using supplied jumper plug) It is recommended to set bias
in the lower range when using Silicon Rectifier.
Connect the loudspeaker
to the amp. Turn Level &
Master to 0. Make sure
POWER & STDBY
switches are in OFF
position. Connect mains
power cord to the amp
and mains outlet.
Connect a DMM set to DC
Volts range 100 or 200mV
to the test points as
shown above: (-) lead to
the white GND socket, (+)
lead to red Vta socket.
Turn the mains power ON
Wait ca 5 minutes, DMM
should read 000
Insert a screwdriver with
a ca 3mm wide chisel into
the “Level” trim pot,
check that the chisel has
engaged with trimpot
adjustment screw by
giving it a half turn in
either direction. Note that
both Level & Balance trim
pots are 15 turn devices.
Turn the STDBY switch to
PLAY
Observe the DMM, if the
reading is higher than
35mV adjust it down by
turning the screwdriver
counterclockwise.