22A3 Monaural Amplifier Rev 1.0
3
1.0
Amplifier Setup
Pre-Operation Checklist
•
Connect speakers to proper load impedance output.
•
Insert tubes into proper sockets.
See Section 3.1
–
Installing Tubes.
•
Connect Mains to 120V wall outlet. Ensure a proper outlet ground connection
with a ground tester.
•
Turn the volume all the way down.
•
After warming up, check power tube bias without attempting to input an audio
signal.
Ensure the speaker load is connected before powering on!
See Section 3.3
–
Biasing.
1.1
Amplifier Placement
For the best operation and longest life of components, the amplifier should be set up and used in
a well-ventilated area with good air circulation. Do not use the amplifier in enclosed furniture as
this may result in a fire.
Overheating can damage the amplifier and diminish tube life.
1.2
Setting The Load Impedance
Never turn on your amplifier without speakers connected to the proper output load
impedance.
Operation of the amplifier without a speaker load or open circuited loudspeaker voice
coil can permanently damage the output transformers as well as other major components.