Drawmer 1961 Vacuum Tube Equaliser - Manual (Page 4)

1961 OPERATORS’ MANUAL 2
POWER CONNECTION
The unit will have been supplied with a power cable suitable for domestic power
outlets in your country. For your own safety it is important that you use this cable.
The unit should always be connected to the mains supply earth using this cable.
If for some reason the unit is to be used at a mains input operating voltage which is
different to that as supplied, the following procedure must be carried out. (See
following diagram)
1: Disconnect the unit from the mains.
2: Using a number 1 size pozidrive screwdriver, remove the two self-tapping
screws holding the voltage selection switch cover plate on the rear panel.
3: Remove the cover plate and slide the switch fully to its opposite end.
4: Rotate the cover plate one half turn, (180E) and refit the two screws.
5: Fit a correctly rated fuse for the selected operation voltage.
6: Reconnect to mains power source.
INSTALLATION
The 1961 is designed for standard 19" rack mounting and occupies 2U of rack space.
Fibre or plastic washers may be used to prevent the front panel becoming marked by
the mounting bolts. Because the tube circuitry generates more heat than an
equivalent solid-state design, we recommend space be left above the unit to allow
the heat to dissipate.
!
Care should be taken in the choice of positioning. The unit should not be
mounted where other equipment obstructs the normal air flow. The unit should
not be situated near any heat source, such as a radiator, stove or a high
power amplifier that would generate heat.
! The appliance should not be operated near any water or in a location where
moisture might be present.
! Always connect the mains earth to the unit.
If the 1961 is to be continuously moved from one location to another, we suggest
using additional support in the rack at the rear of the unit.