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Receiver Frequency Change Instructions
Tuning for the R7, R30, R31, and R32 receivers is determined by a single tuning coil.
In the R7-4 and R7-6, one coil is assigned to each switch position. See the following
6 figures and receiver types to locate the coils to be adjusted. A plastic tuning
wrench (PLT 005) will be needed to adjust these receiver tuning coils.
Most Williams Sound single channel Receivers are set at the factory to 72.9 MHz. The
standard four-channel receivers (R7-4NA), Channels 1-4, are usually set to frequen-
cies 72.1, 72.5, 72.9, 75.7 MHz respectively. The standard six-channel receivers (R7-
6N), channels 1-6, are set to frequencies 72.1, 72.5, 72.9, 75.7, 74.7 and 75.3 MHz
respectively.
The Receiver must be tuned with a weak and somewhat noisy signal. If tuned too
close to the transmitter, with a strong signal, the most accurate tuning of the receiv-
er is not possible.
To Change the Frequency to Another Channel:
Step 1: Set the transmitter to the channel desired and remove the antenna.
Step 2: Connect an audio source to the transmitter such as a CD or cassette
player or microphone.
Step 3: Move the receiver about 25 feet away from the transmitter to set the
tuning.
Step 4: Open the battery compartment, then lift up on the battery door to open
the back of the receiver. This will expose the tuning coil or coils to be
adjusted.
IC01
1
1
2
3
4
2
12
1
2
3
4
6
5
R30 R-31 R-32
R7Y R7-4 R7-6
TUNING COIL
Ferrite Tuning
"Slug"