Vectronics VEC-841W - Manual (Page 3)

VEC-841W Owner's Manual Tunable SSB/CW Audio Filter
3
THEORY OF OPERATION AND SPECIFICATIONS
Operation:
The VEC-841W uses two TL084 operational amplifier integrated circuits to
form a tunable audio filter designed to clarify and remove interfering signals
from both voice and digital signals. The Peak and Notch functions are
variable, giving the user full control of the filter bandwidth and frequency
settings. This not only allows you to remove interference, but also to
enhance desired signals.
The filter also has an LM380 Audio Amplifier which can drive an 8 ohm
speaker or headphones.
Specifications:
Bandwidth: ................................ Variable from 40 Hz to nearly flat
Center Frequency:...................... Variable from 300-3000 Hz.
Notch Depth: ............................. Approximately 70dB
Power Required: ........................ 9-18 volts DC @ 300mA
PCB Dimensions: ...................... 4.000" x 4.700" printed circuit board.
TECHNICAL ASSISTANCE
If you have any problem with this unit first check the appropriate section of
this manual. If the manual does not reference your problem or your problem
is not solved by reading the manual, you may call VECTRONICS at 601-323-
5800. You will be best helped if you have your unit, manual and all
information on your station handy so you can answer any questions the
technicians may ask.
You can also send questions by mail to Vectronics, 1007 HWY 25 South,
Starkville, MS 39759, or by FAX to 601-323-6551. Send a complete
description of your problem, an explanation of exactly how you are using
your unit, and a complete description of your station.