Telex STRATUS 50-D - Manual (Page 4)

Microphone Bias Voltage Requirements
The boom microphone operates on a voltage of 8-16 VDC. Output voltage
is 50 ohms (Designed for radio input impedances from 50-600 ohms). If
you are uncertain whether your avionics equipment meets this requirement,
consult the avionics equipment manufacturer.
Headset Power
The headset will operate with either 4 AA batteries or panel power from 8-
32 Vdc.
Panel Power Option
An optional power cord is provided for use in negative ground electrical
systems only. Do not attempt to use with positive ground electrical systems.
The power cord is designed to connect the battery module to the aircraft
power via the cigarette lighter jack.
Page 2
Figure 3
Battery Installation
Figure 2
Panel Power Option
45 0 Locking
Battery Power
The battery module requires 4 AA Batteries. Alkaline batteries are
recommended for best performance. Do not use nickel-cadmium
rechargeable batteries or lithium batteries.
1. Slide the battery door down in the direction of the arrow, then up to
rotate the battery door (Figure 3).
2. Place the batteries into the battery module as shown.
3. Slide the battery door back into place.
Power Cord