Shure Split Bar Kit RK199S Fascicule

5.

Remove the two screws securing the present switch stack
and carefully move the switch stack to one side. Attach
the right-angle bracket to the switch mounting plate using
a 

5

/

16

” screw and the single mounting plate hole next to

the switch stack screw holes. The long “tail” of the coil
spring on the Transmit bar must be in front of the
right–angle bracket. The assembly should be such that
the Transmit bar cannot be activated unless the Monitor
bar has been depressed. NOTE: The other two holes in
the right–angle bracket should be directly over the screw
holes to which the original switch was fastened.

6.

Assemble the three-blade switch stack to the switch
mounting plate so that it is under the Monitor bar. If the
original switch is to be used for transmitting, place it in its
original position over the right-angle bracket. If the
five-blade switch supplied with the RK199S is to replace
the original switch, fasten the new switch over the
right-angle bracket to the switch mounting plate.

7.

Perforate the LUBRIPLATE capsule and apply the
lubricant where the Monitor switch bar touches the
Monitor switch, and where the Transmit switch bar
touches the Transmit switch.

8.

Solder the cartridge, cable and associated circuitry leads
to the switch stack terminals as required (see 

Wiring

section).

9.

Bend or “knife” the Monitor and Transmit switch blades as
required to make proper contact in the desired sequence.

10. Replace the baseplate and fasten it with the screws

previously removed.

11. Remove the paper backing from the Monitor and Transmit

labels and affix them on or adjacent to the Monitor and
Transmit switch bars.

Refer to the transceiver and microphone data sheets, and wire

the microphone for the desired functions. Note that wiring for open
or shorted squelch and transmit circuits can be employed. In the
three wiring examples that follow, the grounded-squelch
configuration has been used.

Figure 2 shows a typical wiring arrangement for a Shure 444D

microphone. Note that on the five-terminal switch, the connection
between the black lead and ground has been opened, and the
black lead has been connected to pin 1 of the three-blade switch.

Figure 3 shows typical wiring for a Shure 450 microphone. The

RK199S has been installed using the original switch stack.

Figure 4 depicts the RK199S in a Shure 522 microphone. The

black lead has been disconnected from the PTT switch relay circuit,
and connected to one insulated terminal of the Monitor switch
(depending on whether normally-open or normally-closed
operation is desired). The PTT switch has been grounded where
the black wire was removed.

MODEL 444D–RK199S SWITCH WIRING

MODEL 450–RK199S SWITCH WIRING

MODEL 522–RK199S SWITCH WIRING