Vectronics VEC-204 User Manual
VEC-204 Instruction Manual Electronic Keyer
Introduction
The VEC-204 Electronic Keyer Paddle with Memory is an iambic keyer and
paddle combination. The VEC-204 is a microprocessor controlled keyer that
provides iambic key operations and dot-and-dash memory to make sending
perfect code easier. It has tunable code speed, code weight, and sidetone
frequency; it supports both direct and grid-block keying outputs. You also get to
choose between Iambic Type "A" and Type "B" keying. It even has a nonvolatile memory to record and play a message of your choice.
Control Functions
1. The Power button turns the unit ON and OFF. The power is ON when the
button is locked in the " in" po sition and the LED is lit and OFF in the "out"
position.
2. The Semi-Auto/Auto button allows semi-automatic "bug" and manual
operations. The keyer generates dots automatically. Dashes are manually
made. The keyer is completely manual when only the dash is used. SemiAuto is active when the switch is locked in the "in" position and Auto is
active in the "out" position.
3. The Message button lets you record and play a message from the non-
volatile memory. It is a momentary time sensitive push-button.
4. The Speed control, located on the left side of the unit, varies code speed
from 2 to 65 WPM. Turn the control clockwise to increase speed and
counter-clockwise to decrease speed.
5. The Volume control, located on the left side of the unit, adjusts the sidetone
level of the internal speaker. Turn the control clockwise to increase the
volume and counter-clockwise to decrease the volume.
6. The Weight control varies the code weight from approximately 10% to
190%, with the standard dot defined as 100% weight. The standard dotdash-space ratio is 1:3:1 (trimpot at mid-range). This control is accessed
through a small hole on the rear of the unit and may be adjusted using a
small flat-headed screwdriver. This control is turned clockwise to increase
dot and dash lengths and counter-clockwise to decrease dot and dash
lengths.
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VEC-204 Instruction Manual Electronic Keyer
7. The Tone control sets the desired sidetone pitch from approximately 200 to
1000 Hz. This control is also accessed through a small hole on the rear of
the unit and may be adjusted using a small flat-headed screwdriver. This
control is turned clockwise to raise the pitch and counter-clockwise to lower
the pitch.
8. The Key Output circuit supports both positive and negative keyed radios.
The VEC-204 can only key one type of transmitter at a time. This is an
internal jumper selected option. The unit is factory set to direct keying
(most solid state radios). To change to grid-block keying (most radios with
tube finals) the power must be off, then remove the paddle to access the
jumpers inside the case. Locate jumpers JMP1 and JMP2. JMP2 is directly
behind the RCA jack. JMP1 is approximately one inch behind the RCA
jack. Set both jumpers JMP1 and JMP2 to the "G" p osition. T o key a solid
state transmitter, set both jumpers to the "D" position.
Note: Power must be off when changing the jumper settings.
9. The Iambic Type A/B mode is also set inside the unit with a jumper. The
unit is factory set for Type "A" Iambic. If you prefer Type "B" Iambic,
remove the paddle to access the jumper. Locate jumper JMP3 near the
Speed control and set it to the "B" position. For T ype "A" Iambic, set the
jumper to the "A" position.
Note: Power must be off when changing the jumper settings.
When a squeeze is released during an element (dot or dash), type "B" adds
the opposite element. Type "A" just finishes the element in progress and
does not produce a following alternate element. For example, in Type "A"
Iambic, a squeeze release during the "dah" in the letter A will produce "dit
dah" (A). In Type "B" Iambic, a squeeze release during the "dah" in the
letter A will produce "dit dah dit" (R).
Connections
1. A nine volt battery (not included) may be installed. Remove the case by
removing the screws on the bottom that secure it to the paddle. A battery
clip, located inside the case, is provided for installing a nine volt battery.
2. A 12 Vdc power supply may also be used to power the VEC-204. A 2.1mm
coaxial plug with a positive center and a negative sleeve should be used to
power this unit. The battery is automatically disconnected when external
power is used.
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VEC-204 Instruction Manual Electronic Keyer
3. The keying circuit allows keying of grid-block and solid state transmitters.
Keying output connection is made with a quality standard shielded RCA
cable between your radio key input and the VEC-204's Key Output jack.
Note: Consult the transmitter's instruction manual to determine which
output to use. When in doubt, try both jumper positions. The
transmitter will key continuously when the jumpers are connected to
the wrong positions.
Keyer Operation
1. A nine volt battery or an optional power adapter may be used to supply
power to the keyer.
2. The keyer should be turned on by pressing the Power button and the LED is
lit.
3. The Semi-Auto/Auto button should be in the "o ut" position for automatic
operation.
4. The user should now start sending with the paddle and adjust volume, tone,
weight, and speed to his or her preference.
5. The dot and dash memories make sending easier. The memories allow the
user to key a dot before the completion of a dash and vice versa. This
feature can be checked by setting the keyer to the lowest speed and tapping
first the dash lever and then the dot lever before the completion of the dash.
The keyer will provide both the dash and the dot. The dash memory can be
checked in a similar manner. The dot insertion feature allows the user to
insert a dot by tapping the dot lever while holding the dash lever in. The
dash insertion feature allows the user to insert a dash while holding the dot
lever in. The Iambic operation feature allows sending of alternate dots and
dashes when both paddles are squeezed. The first paddle contacted will
determine whether a dot or dash occurs first.
6. The user may select either Iambic A or B according to his or her preference.
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