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2 2 2 HARTREY AVE., EVANSTON. IL. 6 0 2 0 4 U.S A.
DATA
MODEL CB41
@
AREA CODE 312/328-9000
.
CABLE SHUREMICRO
SHEET
CONTROLLED MAGNETICB BASE STATION CITIZENS BAND MICROPHONE
GENERAL
The Shure Model CB41 LONG RANGER base Sta-
tion microphone is designed especially for use with
Citizens Band transceivers. For clearer transmission
and improved reliability, this sturdy dual-impedance
microphone can be used to replace ceramic or dy-
namic microphones supplied as original equipment.
Model CB41 provides crisp, undistorted voice re-
sponse of high intelligibility and high output. Easy
impedance selection at the end of the coiled cable
makes the microphone suitable for connection to either
high-impedance or low-impedance (ceramic or dy-
namic) inputs.
Height adjustment for maximum user comfort, a
momentary or locking press-to-talk transmit-receive
switch for greatest ease of use, and a selector switch
for either grounded or isolated transceiver switching
(no internal microphone wiring change required) make
the Model CB41 the choice for unparalleled versatility.
The microphone is not affected by heat or humidity.
Its exclusive ARMO-DUR@ case is immune to oil,
grease, fumes, salt spray, sun, rust, and corrosion-
and is outstanding in its ability to resist mechanical
shocks and vibration. The "Million-Cycle"
leaf-type
switch is designed to withstand rigorous operating
conditions and constant use.
Microphone Features:
w
Highly intelligible voice response
Replaces either ceramic or dynamic original equip-
ment microphones
Dual impedance-matches
either high- or low-
impedance inputs
Reliable high output CONTROLLED MAGNETIC
cartridge
Adjustable height for maximum comfort
Momentary or locking press-to-talk transmit-receive
switch
Selector switch for either grounded or isolated
transceiver switching-no
internal wiring change
required
Unequaled ruggedness and durability
Tough ARMO-DUR case
CONNECTIONS
The internal connections of Model CB41 are shown
in Figure 1.
- W E
TRIWSYIT-REEIYL
SWITUI
- I
W N W - I S O L A T E D
C A Y
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INTERNAL CONNECTIONS
FIGURE 1
Refer to the Shure CB Wiring Guide enclosed with
the microphone for detailed instructions for connect-
ing the CB41 to your transceiver. If your unit is not
listed in the Guide, contact your dealer or Shure
Brothers Incorporated for information. This microphone
is not designed for use with transceivers requiring
five-conductor shielded cable. Passage of the CB41
cable through small-diameter connectors may be
eased by lubricating the outer jacket of the cable.
The general wiring procedure for transceiver con-
nections is as follows.
Relay or Switching Circuit:
GROUNDED SWITCHING
Most transceivers employ a grounded circuit to
switch from the receive to the transmit position. To
connect the microphone to such a circuit, proceed as
follows.
1. Turn the microphone upside down and check
that the Grounded-Isolated switch in the base-
plate is in the Grounded position.
2. Connect the RED lead to the terminal used to
complete the transmitter circuit.
3. Connect the BLACK lead to the terminal used
to complete the receiver circuit. This will usually
be a ground return from the loudspeaker. If a
microphone switching contact is not required for
the loudspeaker ground, insulate (wrap with tape)
the BLACK cable lead.
4. Connect the shield to chassis or circuit ground
of the transceiver (see Guide).
ISOLATED SWITCHING
In some transceivers, an isolated circuit is required
to switch power supply voltages rather than grounds.
If an isolated switching circuit is required, proceed as
follows.
1. Turn the microphone upside down and check
that the Grounded-Isolated switch in the base-
plate is in the Isolated position.
2. Connect the RED lead to the isolated switch con-
tact terminal used to complete the transmitter
circuit.
3. Connect the BLACK lead to the other isolated
switch contact terminal used for power supply
voltage.
Copyright
1 9 7 6 ,
Shure Brothers Inc.
27A1314 (PH)
(OVER)
Printed
in
U.S.A.
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