Vectronics VEC-841K - Manual (Page 14)

VEC-841K Owner's Manual Tunable SSB/CW Audio Filter Kit
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! ! 9. Locate capacitor C17 (.1uF). Insert at C17, solder in place and trim
the leads.
! ! 10. Locate capacitor C2 (.01uF). The is a disc ceramic capacitor and will
be marked with either a "103" or "103Z" on the body. (actual value in
uF). Insert at C2, solder in place and trim the leads.
! ! 11. Locate capacitor C4 (.01uF). Insert at C4, solder in place and trim the
leads.
! ! 12. Locate capacitor C15 (.01uF). Insert at C15, solder in place and trim
the leads.
At this point you may want to take a few minutes to double check your work.
There are still quite a few parts to be installed on this board.
Installing Trimpots:
! ! 1. Locate R25. This is a 10K horizontal trimpot.
! ! 2. Insert R25 into its mounting holes until it stops, making sure that all
three (3) legs are inserted into the board. Bend the legs outward to
secure the part to the board. Solder in place.
! ! 3. Locate R24. This is a 500K horizontal trimpot.
! ! 4. Insert R24 into its mounting holes until it stops, making sure that all
three (3) legs are inserted into the board. Bend the legs outward to
secure the part to the board. Solder in place.
Installing Electrolytic Capacitors:
Important Note: Electrolytic caps are polarized and must be installed the correct
way in order to work. Each capacitor's plus (+) mounting holes are noted on
both the circuit board and parts placement diagram. If the markings on the
capacitor body are unclear, the plus (+) lead is always the longer of the two.
! ! 1. Locate capacitor C12 (100uF). This is an electrolytic capacitor and
will be marked "100uF" (actual value in uF). Remember, an
electrolytic capacitor is a polarity sensitive component and must be
installed properly.
! ! 2. Carefully install C12, ensuring that both leads are fully seated, and that
it is installed with respect to the proper polarity Once installed, then
solder in place and trim the leads.
! ! 3. Locate capacitor C11 (470uF). This is an electrolytic capacitor and
will be marked "470uF". Insert at C11, observing correct polarity,
solder in place and trim the leads.