Audio Note ANKORU/II Owner's Information page 9

VALVE INSTALLATION continued...
Looking from the back of the amplifier, insert the 5R4WGB valves into the two empty
sockets located on the left, situated between the black rectangular transformer
covers and the loudspeaker connection binding posts. Locate the rib on the central
pin of the valve and align with the valve base (it can only be inserted one way due to
this locating rib) and with gentle but firm pressure insert the valve.
Finally, insert the small signal valve into the front socket. The valve can only be
inserted one way.
Check one more time that all of the 5 valves are correctly fitted, and
repeat the process for the second amplifier.