22A3 Monaural Amplifier Rev 1.0
11
3.0 Technical Information
3.1
Installing Tubes
Position of vacuum tubes is as indicated in this top view with the front face of the amplifier toward the bottom of the
page (V1-V5).
Tubes for positions V1 through V5 may be indicated on the boxes of the tubes that are shipped
with the amplifier. These are selected for maximum performance, and their positions should be
followed.
Tubes should always be installed and removed by handling the base of the tube, rather than the
glass. Match the keyway in the tube socket with the key in the tube and install with a slight and
gentle circular rocking motion until the tube is fully seated against the socket. Follow the same
procedure for removal.
3.2
Replacing Tubes
Vacuum tubes should be replaced when a lack of power becomes apparent. Dynamics and
transients may seem lazy and less crisp compared to how they sounded when new. Under extreme
V1
V2
V3
V4
V5
6SL7
6SN7
2A3
2A3
GZ34
Preamp
Preamp
Power
Power
Rectifier
n
