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Vectronics VEC-841K User Manual

Page 17

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VEC-841K Owner's Manual

Tunable SSB/CW Audio Filter Kit

14

Important Note: Refer to the "Parts Placement" section for the proper
orientation of Pin 1 of the IC sockets. Proper orientation is essential to ensure
that the ICs are installed properly.

! ! 1. Locate a 14-pin IC socket. Install it at the location for U1, ensuring

proper orientation of pin 1. Refer to "Parts Placement Diagram" for
proper orientation of pin 1.

! ! 2. Bend the four corner pins against the solder pads to hold the socket in

place. Solder in place. Be careful not to create any solder bridges
between the pins.

! ! 3. Locate another 14-pin IC socket. Install it at the location U2, ensuring

proper orientation of pin 1. Solder.

! ! 4. Locate the final 14-pin IC socket. Install it at the location for U3,

ensuring proper orientation of pin 1. Solder.

! ! 5. Locate both TL084 op amp integrated circuits. Insert them into IC

sockets for U2 and U3. Please refer to the "Parts Placement Diagram"
for proper orientation. Be sure not to bend any of the pins underneath
the IC body, and that all pins are inserted into the socket.

! ! 6. Locate the LM380 audio amplifier integrated circuit. Insert it into IC

socket for U1. Please refer to the "Parts Placement Diagram" for
proper orientation. Be sure not to bend any of the pins underneath the
IC body, and that all pins are inserted into the socket.

Installing Jacks:

! ! 1. Locate the RCA phono jack, J4. Install J4 so that the three (3) frame

legs and the center conductor pin are inserted into the circuit board.
Be sure that the frame of J4 is fully seated and is parallel with the
circuit board surface. Solder in place.

! ! 2. Locate the 2.1mm coaxial power jack, J3. Install J3 so all legs are

fully inserted into the circuit board, and the body rests totally against
the circuit board surface. Solder in place.

! ! 3. Locate the 1/4" phones jack, J1. Install J1 so all seven (7) legs are

fully inserted into the circuit board. Solder in place.

! ! 4. Locate the 3.5mm external speaker jack, J2. Install J2 so all legs are

fully inserted into the circuit board. Solder in place.

Installing Main Controls: