Telex PH-81 User Manual
PH-81 PH-85
Headsets with 20Ω Omnidirectional Carbon Mics & A4F Connectors
These headsets are specically designed to provide high-quality communication through carbon camera
intercoms in television studios or remote production locations. They have sensitive carbon microphones
with a smooth voice frequency range and are compatible with Western Electric-type intercom circuits. The
earphones have highly sensitive magnetic receivers that can be easily removed and replaced in the eld
for convenience and economy. A high quality coil cord with durable strain relief at the ear cup provides
tangle-free use.
Features
Easy head size adjustment
Highly sensitive magnetic earphone elements
Mic can be worn on either side of the head
No-tangle unterminated coil cord
Omni-directional carbon microphone
Polyurethane covers that resist cracking
Vents allow air to circulate providing day-long comfort
Washable nylon socks are provided for ear cups
Wiring Diagram
PH-81 PH-85
PH-81 & PH-85 Specications
Connector Termination
Stripped wire coiled cord
Type
PH-81: Single Sided
PH-85: Dual Sided
Mic Type
Carbon Omni-Directional
Mic Sensitivity
-28dBV/Pa @1cm, 8V through 470Ω bias, 150Ω AC load
Mic Frequency Range
100Hz - 6kHz
Mic Impedance
20Ω
Speaker Sensitivity
100dB SPL @2kHz, 1mW
Speaker Frequency Range
600Hz - 10kHz
Speaker Impedance
PH-81: 275Ω
PH-85: 275Ω boom side, 625Ω non-boom side
Weight
PH-81: 12oz. (not including cord)
PH-85: 14oz. (not including cord)
Cord Length
2 ft. retracted, 12 ft. extended
Contact Information
Telex Communications, Inc.
12000 Portland Avenue South
Burnsville, Minnesota 55337
Telephone: 877·863·4169
Fax: (800) 323-0498
Form Number: – LIT000205000 Rev A
Date: December, 2007
Ordering Information
PH-81
Single-Sided Headset with 20Ω Omnidirectional
Carbon Mic
Catalog Number: 64438-004
PH-85
Dual-Sided Headset with 20Ω Omnidirectional Carbon
Mic
Catalog Number: 64437-005
This specications information is preliminary and is subject to change without notication.
Brand names mentioned are the property of their respective companies.
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