Shure Switch RK199S User Manual

Model RK199S User Guide  
SPLIT BAR SWITCH KIT  
The Shure Model RK199S Split Bar Switch Kit is designed to  
Transmit Label  
Monitor Label  
28A366  
28B366  
enable users of Shure base station microphones to monitor a  
communications channel by disabling the receiver squelch circuit  
before transmitting. Once installed, the microphone Transmit  
switch can be depressed only while the Monitor switch is  
depressed. The Monitor switch can be momentarily depressed, or  
locked in the “on” position by depressing it and sliding it forward.  
Lubriplate Capsule  
90MF1371  
30E689A  
1
/ ” No. 4 Phillips Head Self-Tapping  
2
Screws (2)  
5
/
16  
” No. 4 Binding Head Self-Tapping 30C640C  
The RK199S is especially useful in shared-channel radio  
systems using a continuous tone coded squelch system (CTCSS).  
CTCSS requires the addition of a tone encoder at the transmitter  
and a decoder at the receiver. The transmitted carrier is  
continuously modulated with a subaudible tone which is  
demodulated and decoded at the receiver, and used to activate the  
squelch circuit. The receiver remains squelched until it receives a  
carrier modulated with a tone of the proper frequency. The  
RK199S is designed to be installed in Shure Model 444D, 450 and  
522 Base Station Microphones. The RK199S consists of the  
following parts.  
Screws (2)  
INSTALLATION  
Install the RK199S as follows.  
1. Remove the two screws fastening the baseplate to the  
bottom of the microphone.  
2. Remove the baseplate, taking care not to stress the wiring  
to the switch mounted in the baseplate.  
3. Loosen (unscrew about one turn), but do not remove, the  
screws holding the switch mounting plate to the base (see  
Figure 1). NOTE: The screws should be loosened only  
enough to allow the switch bar to be pushed down and out  
from underneath the switch mounting plate. If the plate is  
loosened too much, the tip of the mounting bracket  
extending through the upright portion of the base will slip  
out of the slot in the switch mounting plate. The tip must  
be replaced in the slot before reassembly can be  
accomplished.  
ITEM  
Five-Blade Switch  
Three-Blade Switch  
PART NO.  
90A3119  
90A946  
Transmit Switch Bar-Spring Assembly 90A1022  
Monitor Switch Bar  
Right-Angle Bracket  
65A1177A  
53A667  
4. Install the switch bars in the base, beginning with the  
Monitor (smaller of the two bars). Slip the pivot of the bar  
beneath the switch mounting plate, and snap it into place.  
Insert the Transmit bar (larger of the two bars) in the same  
manner, and tighten the screws holding the switch  
mounting plate to the base. Check the position of the  
mounting bracket tip as described in step 3.  
MODEL RK199S SPLIT BAR SWITCH KIT  
(INSTALLED)  
FIGURE 1  
2001, Shure Incorporated  
27B2417 (AD)  
Printed in Mexico  
 

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