VEC-821K Instruction Manual
Super CW Filter Kit
5
INTRODUCTION
Thank you for purchasing the VEC-821K CW Filter kit. The VEC-821K
consists of a four stage, switch selectable band pass CW filter, using
selected components that will make “cleaning up” CW signals effortless
and easy. Featuring razor sharp selectivity and extremely steep sided
skirts, even the weakest signal stands out. Also, the VEC-821K has a 1
watt audio amplifier built in that will easily drive headphones or an
external speaker. With the VEC-821K you bring up any hard to hear
signal out of a “band pile up” for easy listening or get rid of unwanted,
annoying signals. The VEC-821K also features a headphone output that
will allow the use of standard monoral headphones. Although physically
small in size, the VEC-821K is high on performance and reliability. The
VEC-821K is powered from a 9-volt transistor radio battery, or any 9-18
volt DC power supply.
TOOLS AND SUPPLIES
Construction Area:
Kit construction requires a clean, smooth, and well-
lighted area where you can easily organize and handle small parts
without losing them. An inexpensive sheet of white poster board makes
an excellent construction surface, while providing protection for the
underlying table or desk. Well-diffused overhead lighting is a plus, and a
supplemental high-intensity desk lamp will prove especially helpful for
close-up work. Safety is an important consideration. Be sure to use a
suitable high-temperature stand for your soldering iron, and keep the
work area free of combustible clutter.
Universal Kit-building Tools:
Although your particular kit may require
additional items to complete, virtually all construction projects require a
work area outfitted with the following tools and supplies:
30-60 watt Soldering Iron
High-temperature Iron Holder with a Moist Cleaning Sponge
Rosin-core Solder (thin wire-size preferred)
Needle Nose Pliers or Surgical Hemostats
Diagonal Cutters or "Nippy Cutters"
Wire Strippers
Solder Sucker, Vacuum Pump, or Desoldering Braid
Bright Desk Lamp
Magnifying Glass
