Vectronics VEC-221K - Manual (Page 5)

VEC-221K Instruction Manual CW Memory Keyer Kit
1
INTRODUCTION
Welcome to the world of effortless CW. With the VEC-221K, you’ll have a
professional sounding fist in no time! Whether you’re a Novice or seasoned
Extra, the VEC-221K CW Memory Keyer Kit has the features you’ve been
waiting for! Novices will appreciate the preset factory defaults for plug-and-play
operation. Extra’s will enjoy the advanced features: weight control from 25 to
75%, iambic A and B operation, auto or semi-auto operation, full dot-and-dash
memories, and immediate front-panel speed control from 3 to 65 WPM. The
VEC-221K uses non-volatile memory to store four messages of about 120
characters each. Because the message memories are non-volatile, it does not
require battery backup to preserve the recorded messages. The built-in sidetone
generator is ideal for CW practice sessions or for radios lacking a CW sidetone.
The sidetone is implemented as a sinewave with 5 ms rise and decay times for
removing harsh key clicks.
The VEC-221K keyer is compatible with any modern transceiver or QRP
transmitter using positive keying. The 50 volt at 100 mA keying permits the use
of many early vintage cathode-keyed transmitters. Its small size and battery
operation are ideal for QRP or Field Day activities! CW has never been so
enjoyable or effortless!
A state-of-the-art PIC16C72 microprocessor is the heart of the keyer! Learn the
basics behind embedded controllers, and how they are revolutionizing the
electronics field. The powerful PIC device permits advanced settings to be
entered from the keyer paddles, using Morse characters! The generously-sized
quality glass-epoxy PC board with silk-screened component legends and solder-
masking make assembly a snap. Powered by a common 9-volt transistor radio
battery, the keyer is ready for action whenever you are!
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: