Vectronics VEC-254 - Manual

VEC-254 Owner's Manual Classroom Code Practice Oscillator
1
INTRODUCTION
The VEC-254 is the finest keyed oscillator on the market. Its professional
quality is well suited for demanding classroom use and abuse. The VEC-254's
unique design removes any harsh key clicks. Making the VEC-254 a perfect
complement to any keyer paddle. This unit enhances classroom instruction of
Morse Code by delivering a full watt of power to the internal 3 inch speaker.
Key clicks can be especially annoying in high output units where they tend to
bounce around the room. The VEC-254 produces a true pure sinewave so you'll
hear the clearest sounding tone you have ever heard from a code practice
oscillator. You'll get low distortion CW--typically less than .2% total harmonic
distortion from its BTL (Bridge-Tied-Load) amplifier.
FRONT PANEL
Power (On/Off)................................Power Switch
Volume ............................................Volume Control
Tone ................................................Tone Control
Pwr ..................................................Power Indicator
Key Input.........................................1/4" Phone Jack
REAR PANEL
Power...............................................2.1mm Coaxial Jack
Ext. Speaker ....................................3.5mm Speaker Jack
OPERATION
The VEC-254 requires a 12V source for power operation. The power jack
accepts a 2.1mm coaxial type plug with the outside sleeve as the ground pole and
the inside as the positive pole. Apply power to the unit by plugging a power
adapter to the jack on the back of the unit labeled "Power". With the switch in
the Off position (out), connect a keyer paddle to the "Key Input" of the VEC-
254. The Key Input requires a 1/4" mono or stereo plug with a 2-conductor wire
from the keyer. The sleeve is connected to ground and the other wire is
connected to the tip. Once the power and keyer have been attached, the VEC-
254 is ready to use. Push in the power switch to the On position and verify that
the indicator labeled "Pwr" is lit.