14
RackPack 4
Power Supply
Measurements And Weight
Recommendations On Module Configuration
Do not place preamp modules in the slot next to the internal power supply to avoid interfer-
ence. If more than three preamp modules are required, we recommend to use the RackPack 8
frame, model 2710, with external power supply.
The tube module TwinTube is supplied with very high currents. Therefore, two TwinTube
modules are the maximum for one RackPack 4 frame.
250 V Security Mode
The TwinTube module requires 250 V power supply. This current is automatically activated
only when a TwinTube module is present. Otherwise this high current is switched off in order
to reduce power supply load and risk potentials.
The power supply module is equipped with two LEDs indicating the 250 v Security Mode
status. The LEDs are also visible through the louvers of the top panel.
•
Green LED illuminates: 250 V current activated
•
Rote LED illuminates: Error – 250 V current deactivated though tube module is present
•
No LED illuminates: 250 V current not activated (no tube module present)
Power Supply
The transformer is dimensioned lavishly (46 VA) to supply all modules sufficiently an any
case.
We use exceptionally low noise voltage regulators, extremely fast diodes and very high
capacities to ensure stable and fast power supply.
48 V phantom power supply is derived with a dedicated voltage regulator for high precision
and stability.
A discrete circuitry supplies constant 250 V current for the tube modules to compensate for
any possible influences from the line voltage. The tube current slowly runs up in a warm-up
mode of about 10 seconds to protect transformer and tubes.
Height x Width x Depth
256 x 132 x 296 mm (housing only)
263 x 149 x 235 mm (including handle, feet, and sockets)
Weight (without modules):
4,95 kg/ ca. 10,91 lbs
