REPLACING THE VALVES
9
1
2
3
4
Screw B and Washer
Clamp
1
ECC82 or 12AU7 or 5814A
Screw A
2
ECC83 or 12AX7 or 7025
3
PCL86
4
PCL86
FRONT
Changing valves 3 and 4
Loosen screw A (break glue). Undo screw B (beware of washer). Move clamp anticlockwise away
from valves. Pull valves gently out.
If unit is not to be moved about a lot the clamp can be removed completely by unscrewing screw A.
(Please note only loosely tighten screws. A small amount of glue is used to stop the screw being
too loose.)
Changing valves 1 and 2
Remove caps. Very gently twist anti-clockwise and pull on the valve holders. To put back – line up
notches to the caps and twist clockwise very carefully.
Again, caps do not have to be on if unit is not to be transported or moved around a great deal.
(However, it
may
be slightly noisy without the caps).
Valves 3 and 4 have to be replaced about once a year if using unit every day. Cost per valve £1.50
Valves 1 and 2 replaced less often.
Ventilation
This is very important for the reliability of the unit. Make sure that there is adequate ventilation. There
are feet on the bottom of the unit so that air can flow through it and the slots on the top. Never put
anything on the top of the unit. Do not leave it on if you are not using it. Leave some free space at the
back.
