EK31
6
EK31U Rev A
10. #8 hex stand offs (91841A009) are also provided with the kit. Install the # 8 x 0.25"screws (91735A190),
provided with the kit, from the component side. Attach the standoffs to these screws on the corners of
the board. Refer to the assembly drawings while installing the standoffs.
11. Refer to parts specific assembly instruction described in the following sections. Connect all the additional
parts for the specific amplifier.
12. Insert the power amplifier into the socket and secure with the #6 screws. Cut the Teflon tubing into 8
pieces, each of length 0.121 (1/8 of an inch) inches approximately. These pieces go onto the pins of the
Power Amplifier before inserting it into the socket. This is done to insulate the pins from the heat sink and
make sure that the PA is tightly fixed into the socket. An Exacto knife works well for this.
Notes: a)
The Teflon pieces should not be longer than the suggested length. If the pieces are longer,
they may interfere in the seating of the part to the heat sink and create a gap between the heat
sink and the part body.
13. Ten thermal washers (TW03) are provided with the kit. The thermal washer is used between the part and
the heat sink. A new washer must be used for each mounting. Mount the Power amplifier to the socket
using the thermal washer provided with the kit.
14. Connect the external connections via the BNC connector and terminal strip. Hook up power supply and
signals as necessary. The amplifier is now ready for testing.
15. Place jumpers J1 and J3 for a non
‐
inverting amplifier. Place jumper J6.
FOR PA01, PA10, PA12, PA51, PA61, AND PA73: (J3 AND J1)
(REFER TO FIGURE 2)
1. For these amplifiers, the current limit resistors (RLIM2 and RLIM3 shown in the schematic) will have equal
resistance values.
2. Use resistor RLIMA (for RLIM2 and RLIM3) for PA12, PA51 and PA61. Use RLIMB (for RLIM2 and RLIM3) for
PA01, PA10 and PA73.
3. Mount these resistors on both the sides of heat sink HS23, and attach them using a #6x0.75 hex screw and
nut. Use the lower hole on the heat sink to mount the resistors.
4. Mount the composite heat sink / resistor assembly on the component side of the board
FOR PA119 (REFER TO TABLE 1 FOR SPECIFIC COMPONENTS)
(REFER TO FIGURE 3)
1. Install the compensation capacitor CC, as shown in the schematic.
2. Install resistor RLIMB (0.2
Ω
) for RLIM1 and RLIM4 shown in the schematic
3. Mount these resistors on both the sides of heat sink HS23, and attach them using a #6x0.75 hex screw and
nut. Use the lower hole on the heat sink to mount the resistors.
4. Mount the composite heat sink / resistor assembly on the component side of the board
