Vectronics VEC-841W - Manual

VEC-841W Owner's Manual Tunable SSB/CW Audio Filter
1
INTRODUCTION
Thank you for purchasing the VEC-841W Tunable CW Audio Filter. The
VEC-841W 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 with extremely steep
sided skirts and a Tunable Notch, makes even the weakest signal stand out.
Also, the VEC-841W has a built-in 1 watt audio amplifier that will easily
drive headphones or an external speaker. With the VEC-841W 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-841W also features a
headphone output that will allow the use of standard mono headphones. The
VEC-841W is powered from any 9-18 volt DC power supply.
OPERATING INSTRUCTIONS
You may use the VEC-841W with any communications receiver or scanner.
You can also use the VEC-841W with a ham-radio transceiver. The VEC-
841W requires a 9-18 volt DC source.
There are a few items that you will need to operate the VEC-841W. We
have provided a list of these items below for your convenience.
•
Communications Receiver, scanner, or Ham Radio transceiver with
proper cables.
•
9-18 volt DC power supply
•
External speaker with a 3.5mm mono plug
•
Mono Headphones with 1/4" phone plug. (optional)
Receiver or Scanner Operation:
As mentioned in the above, you can use the VEC-841W with a
communications receiver or scanner. A BFO, or Beat Frequency Oscillator,
or a Fine Tuning control will assist you in fine tuning the received signals.
1. The filter requires audio from the external speaker or headphones output
of the receiver or scanner. Apply the audio signal to the INPUT jack on
the back of the unit. The INPUT jack is a RCA phono jack, which
requires an RCA phono plug. The center pin of the RCA phono is
positive, while the outer shell is ground.
2. Connect the POSITIVE lead of the external speaker to the TIP of a
3.5mm mono plug. Connect the NEGATIVE lead of the external speaker