Aphex
Thermionics
- Division of Aphex Systems Ltd.
Page 5-1
Installation Instructions
5
Model 1100 MkII Mic Preamp - Owner’s Manual
5.2 Damage & Claims
If damage is evident, do not discard the container
or packing material. Contact your carrier imme-
diately to file a claim for damages. Customarily,
the carrier requires you, the consignee, to make
all damage claims. It will be helpful to retain the
shipping documents and the waybill number.
5.3 Mains Voltage And Fuses
The Model 1100 MkII’s power supply automati-
cally adapts to all a.c. power standards. There is
no voltage selector or replaceable fuse.
5.4 Power Cord
The Model 1100 MkII uses a standard IEC power
cord set. The appropriate mains plug for each
country is normally shipped with each unit. If you
must install or replace the plug, use the correct
wiring code according to Table 1.
5.5 Mounting In A Rack
The Model 1100 MkII occupies one standard 19
in. by 1 3/4 in. rack space (1RU). Chassis depth is
9 inches not including connectors. Allow at least
3.5 inches additional space in back for wiring
and connectors. The chassis is designed to be
fully supported by front panel mounting alone.
To avoid cosmetic damage to the panel, use the
cushioned rack screws provided in the shipping
kit or the equivalent.
5.6 Proper Ventilation
The Model 1100 MkII is a Class A tube amplifier.
It gets hot in use. Please be sure there is adequate
clearance above and below the unit to allow for
ventilation. One rack space is usually sufficient.
Outside of the rack, do not stack units directly on
top of one another. Use some type of blocking to
leave at least an inch of airspace between units.
5.7 Safety Considerations
To minimize the risk of shock or fire, do not
expose the unit to moisture. Allow adequate
ventilation for cooling. Do not open the chassis
cover: there are no user serviceable parts inside.
Installation should be performed only by qualified
individuals. It is the installer’s responsibility to
insure his personal safety and the safety of others
in the work area. It is never a good idea to work
alone in the vicinity of high power electrical and
radio frequency equipment.
5.8 Avoiding Hum and Noise
All microphone preamplifiers are sensitive devices
that can pick up hum from the power transform-
ers of other equipment. You should never install
the Model 1100 MkII near high current equip-
ment such as a power amplifier or console power
supply. If you are experiencing a hum problem
with a rack mounted installation, try moving
the Model 1100 MkII to another rack space or
move other equipment around so you can place
the Model 1100 MkII the farthest away from the
noise source.
You should be able to rack mount multiple Model
1100 MkII’s immediately above and below each
other (separated by a space for ventilation) with-
USA Color Code
Black = Hot (live)
White = Neutral
Green = Ground
IEC/Continental Color Code
Brown = Hot (live)
Blue = Neutral
Yellow/Green = Ground
Table 1: Power Cord Color Codes
5.1 Unpacking
Your Model 1100 MkII was packed carefully at the factory in a container
designed to protect the unit during shipment. Nevertheless, Aphex rec-
ommends making a careful inspection of the shipping carton and the
contents for any signs of physical damage
.
