Wireless Microphones and PA Systems
 

Wireless microphones, intercoms & PA systems show up all over the place nowadays. It seems that ever HS band I see during football season has a wireless PA on a tripod, and the football coaches using wireless headsets of some sort. Even the referees get in on the act!

This page attempts to outline where wireless mics, PA's and intercoms may show up. It is not an end all guide to these devices, as they may show up just about anywhere.

It should be noted that TV stations have special licensing under Part 74 allowing for operation of wireless microphones in the regular TV bands of 174-216, & 470-806MHz on secondary non interfering basis to TV operations. Also applies to persons eligilble under Part 90 for Film & Video Production Companies.This does not preclude the use of any of the below frequencies.

Wireless mics can operate on several bands including the Part 15 49MHz & 928MHz license free bands. These areas will contain mostly consumer type systems, but anybody could show up here. Other common frequencies are outllined in the table below. The channel designators are from some systems which are used in the broadcast industry and are synthesizied to operate on any of the channels listed. Most of these systems have an LED/LCD readout showing the channel number. These systems may also use a proprietaty number system too.

12B
Chan. #FrequencyChan. #FrequencyChan. #FrequencyChan. #FrequencyChan. #Frequency
30.8407B175.400183.800195.800211.600
33.120175.6008E184.00010E196.000212.400
33.1407C175.800184.200196.200213.800
33.400176.400184.400196.600215.200
35.0207D177.000184.60010F196.800215.500
169.200177.4008F184.800197.400
169.425177.800185.00011A198.800
169.4457E178.000185.15011B199.400
169.505178.200185.200199.600
170.225178.6009A186.80011C199.800
170.2457F178.8009B187.400200.400
170.305179.2009C187.80011D201.400
171.045180.000188.40011E202.000
171.105180.1009D189.400202.200
171.125180.4009E190.000202.650
171.4508A180.800190.20011F202.800
171.825181.2509F190.800203.400
171.8458B181.40010A192.80012A204.800
171.905181.600193.200205.400
172.0008C181.80010B193.400205.600
172.200182.000193.60012C205.800
172.800182.40010C193.800206.400
7A174.800183.000194.400208.200
175.000183.200195.200209.150
175.2508D183.40010D195.400210.800

Listed below are known frequencies used by the systems most likely to be seen around various locations.

49MHz Intercoms/Wireless Headsets

49.830, 49.845, 49.860, 49.875, 49.890MHz

Earmark Systems

Offers self contained wireless headsets for construction and various other applications including football coaches etc.

Operates in the 72-76MHz Industrial band.

Lectrosonics Systems

Offers portable wireless PA systems, "Lone Ranger III", very popular with bands to relay instructions from the Band Director & Drum Major(ette) to bands.

Operates on various Part 90 wireless mic frequencies to include: 33.140, 33.400, 171.905

Nady Systems

WMS101 System
RED J 171.900
ORANGE J 185.150
PURPLE J 203.400

151VR
170.245
171.905

351VR
170-218

301/RW-3
800, 807, 920MHz

HT- G 170.225
HT- J 170.850

LT H 170.225, 171.900, 185.150, 191.300, 203.400, 209.150, 215.200

Samson Technologies

Channel #Frequency
0174.600
1177.600
2181.600
3183.600
4186.600
5190.600
6192.600
7195.600
8196.600
9199.600

Sony

UHF Systems UHF TV Channels 54-69
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