Vectronics VEC-1402DK - Manual (Page 11)

VEC-1402DK Instruction Manual High Performance 2 Meter Pre-Amp Kit
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capacitor C6. Gently insert all four leads into the board, making sure
the collector lead is positioned correctly. The body of Q1 should rest
flush with the PC board surface.
! ! 3. Turn the board over, keeping an index finger on Q1 to hold it in place.
Bend each lead over to secure the transistor in place, and trim excess
length off the collector lead. Solder all four leads.
! ! 4. Locate part C2, a 22-pF multilayer capacitor. Its body marking is
“22”.
Important Note: A multilayer cap is similar to a surface-mount "chip" capacitor,
except that it has a lead spot-welded onto each end of the capacitor body.
Multilayers have superior operating characteristics, but the lead welds may fail if
the device is over-stressed. For this reason, never use force to seat a multilayer
cap into the PC board. If the spacing isn't right, pre-form the leads to the
correct spacing before installation!
Incorrect
Ooops! Correct
! ! 5. Insert C2 into its mounting holes, avoiding excess lead length between
the capacitor and the PC board. Solder both leads in place and trim.
Important Note: Examine your work. Are the solder joints shiny? Has the
solder flowed? Is it adhering properly to the foil and leads? Are there unwanted
solder bridges or splashes of solder on the board? Are the leads above the
board as short as possible? From now on, to keep things simple, the instruction
to "solder" indicates soldering both leads, trimming off excess lead ends with
side-cutters, and examining your work for errors.
! ! 6. Locate part C3, a 1.2-pF ceramic disc capacitor. The body marking is
“1.2”.
! ! 7. Insert C3 into the holes shown on the silk-screen outline. Once
again, avoid excess lead length by seating C3 as close to the board as
possible. Solder.
! ! 8. The next capacitor is C1, a 56-pF multilayer capacitor. It is marked
with the 3-digit code "560”, or with "56"--its actual value in pF.