Ashdown CTM-200-RACK Посібник користувача - Сторінка 6
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USER GUIDE
ASHDOWN ENGINEERING - CTM-200-RACK
IDEAL SETTING
KEEP OUT!
WILL STILL WORK
DO NOT SET ANY
AT REDUCED
TUBE THIS HIGH
POWER
THE VU METER
The CTM 200 meter switch has 6 positions , the first 4 are used to set the bias on
each individual output tube.
To Check the Bias, connect the speaker and switch on, allow the amplifier to warm
up for about 15 mins , Turn Gain and Volume down to zero and depress the MUTE
switch. There now should be almost no noise coming out of the speaker.
Using the switch select each Valve in turn and using a trim tool carefully adjust the
25 turn adjuster to set the needle for that valve as per the diagram above.
Once all 4 valves have been adjusted return the selector to one of the last 2
positions.