Telex Wireless Office Headset PH 3500 User Manual

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Telex  
Description and Wiring Diagrams  
Model PH-3500 Headset (300623 Series)  
General Description  
The Telex PH-3500 is a passive noise attenuating head-  
set for use in a noisy environment. Dual controls allow  
the user to individually adjust the volume level for each  
ear. Usingthelatestdesignandmodelingtechniques,Telex  
has been able to maximize the amount of hearing pro-  
tection provided by the PH-3500, while at the same  
time minimizing weight. The PH-3500 has a noise re-  
duction rating of 24 dB, and is suitable for use in noisy  
environments. The PH-3500 features a unique headband  
design that provides comfort for long periods of time.  
Two versions of the PH-3500 are available: with a male  
or female XLR4 connector.  
Design Features  
Comfortable foam-filled headband pad and ear cushions. The headband pad evenly distributes the headset weight, with no pressure  
points, for maximum comfort. The ear cushions combine comfort and light weight with an excellent acoustic seal. An outer urethane  
layer ensures long life. Gel-filled ear cushions are also available for this headset for users who prefer this type. All cushions are field-  
replaceable.  
Boom Microphone: The boom arm features a sealed ball-and-socket joint and flexible boom for precise microphone placement  
on any head size. The boom and cord rotate for microphone placement on either side of the head. The microphone cartridge is an  
electret condensor element. The microphone housing and cartridge are easily removed for replacement.  
Cordage: The microphone cordage is protected inside the boom arm. Shielded wire throughout the headset protects against RFI  
and EMI. Strain-reliefs on all cords provide maximum durability.  
Operation  
Headband Pressure Adjustments  
There are three pressure settings. Increasing the pressure will improve the seal between the earcup and the head for greater noise  
reduction. To change the pressure setting, remove the headset and fold the earcup inward as shown, then rotate the adjustment  
knob to the desired setting. Repeat for both earcups. Both sides of the headband should be set to the same pressure setting to keep  
the headband properly centered on the head.  
HIGH  
MEDIUM  
LOW  
 

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