Vectronics VEC-1402DK - Manual (Page 13)

VEC-1402DK Instruction Manual High Performance 2 Meter Pre-Amp Kit
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! ! 21. C9 is a 22-pF multilayer capacitor marked “22” or "220". Install and
solder.
! ! 22. C10 is a 56-pF multilayer capacitor marked "56" or "560". Install and
solder.
! ! 23. Check to make sure coils L1 and L2 are properly mounted and
soldered. Verify that the values for capacitors C6, C7, C8, C9, and
C10 are correct. Check all soldering for unwanted solder bridges or
solder splashes on the board.
! ! 24. Use a 100-k resistor (brown-black-yellow-gold) at R1. Prepare R1 for
mounting by bending the component leads 90-degrees and parallel to
each other:
.4"
! ! 25. Locate the legend for R1 and install R1 flush with the board. Solder.
! ! 26. In similar fashion, form the leads for R2, a 470-ohm resistor (yellow-
violet-brown-gold). Solder.
! ! 27. Install and solder C11, a 470-pF disc-ceramic capacitor (marked
“471”).
! ! 28. C12 is a 0.1-uF ceramic disc (marked “104”). Install and solder.
! ! 29. Find the two remaining shielded tuning coils. If needed, straighten the
tabs and leads to permit easy insertion.
! ! 30. Install one shielded coil at L3, following the procedures used for coils
L1 and L2.
! ! 31. In similar fashion, install the remaining coil at L4.
! ! 32. Locate and install coaxial connector J1. Note: J1 may be omitted if
you plan to use an enclosure-mounted coaxial fitting be used.
! ! 33. If you need the optional balun, install it at this time. Refer to the
instructions for making and installing the balun in the "operating"
portion of this manual. The balun will not affect tuning of the
preamp's bandpass filters, so testing and alignment may proceed with
or without it installed.