Vectronics VEC-1292K Manuel d'utilisateur
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VEC-1292K Owner’s Manual Stereo Transmitter Kit
1
INTRODUCTION
General Information: This nifty little transmitter will send your favorite tunes
with you--throughout the house or out in the yard. Wish your Walkman
TM
had a
CD player? No problem! Connect the VEC-1292K to your stereo's CD player
and broadcast it to where you are. Can't pick up that distant FM station down in
your basement shop? Simple! Connect the VEC-1292K to your stereo's FM
tuner (the one with the big antenna), and rebroadcast the program on a clear
channel. Thanks to the transmitter's specialized IC, you get true stereo with
outstanding signal quality--just like FM radio stations generate from their
studios. The uses are endless!
Circuitry: The VEC-1292K uses a sophisticated IC containing all of the
circuitry needed for a miniature FM broadcast station. The audio stages,
multiplex-stereo modulator, and transmitter RF section are all there--on one
chip! The transmitter's sub-carrier oscillator is crystal controlled for rock-steady
stereo lock-up on receivers. A channel balance control ensures perfect
symmetry. It's even pre-emphasized for the 75 uS US-broadcast standard. The
IC has everything you need to put a broadcast-quality stereo signal on the air in
your own home. Operating frequency is internally adjustable, and a tuned output
network matches the transmitter to a built-in collapsible antenna.
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. Diffused
overhead lighting is a plus, and a supplemental high-intensity desk lamp is
especially helpful for close-up work. Safety is always important! Use a suitable
high-temperature stand for your soldering iron, and keep the work area free of
clutter.
Universal Kit-building Tools: No special tools are required to complete this
kit beyond common items normally used for bench construction. We
recommend the following:
! Soldering iron (grounded-tip and temperature-controlled preferred)
! High-temperature iron holder with cleaning sponge
! Solder, 60/40 or 37/63 with rosin or "no-clean" flux (.031" dia. is good
size).
! Needle nose pliers or surgical hemostats
Résumé du contenu
Page 1 - TOOLS AND SUPPLIES
VEC-1292K Owner’s Manual Stereo Transmitter Kit 1 INTRODUCTION General Information: This nifty little transmitter will send your favorite tunes with
Page 2 - BEFORE YOU START BUILDING
VEC-1292K Owner’s Manual Stereo Transmitter Kit 10 L2R8SW1Y1C12L1Antenna LeadSeparate the turnstwo mounting holes.Note:evenly so the coilfits between
Page 3
VEC-1292K Owner’s Manual Stereo Transmitter Kit 11 During installation, orient the socket so the notch corresponds to the key on the PC layout. KeyK
Page 4 - PARTS LIST
VEC-1292K Owner’s Manual Stereo Transmitter Kit 12 track area. If you suspect a solder bridge, hold the board in front of a bright light for a bette
Page 5 - PARTS PLACEMENT
VEC-1292K Owner’s Manual Stereo Transmitter Kit 13 TESTING AND ALIGNMENT To set up your FM transmitter, you'll need a line-level stereo-audio so
Page 6
VEC-1292K Owner’s Manual Stereo Transmitter Kit 14 sophisticated audio limiters to boost their average modulation level. Your transmitter doesn&apos
Page 7
VEC-1292K Owner’s Manual Stereo Transmitter Kit 15 This completes alignment of your transmitter. Note that readjustment of the transmitter's ga
Page 8
VEC-1292K Owner’s Manual Stereo Transmitter Kit 16 OPERATING INSTRUCTIONS Once your VEC-1292K is set up, its operation is relatively simple. A typic
Page 9
VEC-1292K Owner’s Manual Stereo Transmitter Kit 17 IN CASE OF DIFFICULTY Before seeking outside assistance, check below for a possible solution: Does
Page 10
VEC-1292K Owner’s Manual Stereo Transmitter Kit 18 THEORY OF OPERATION The BA1404 transmitter IC contains a number of specialized circuits for genera
Page 12
VEC-1292K Owner’s Manual Stereo Transmitter Kit 2 ! Diagonal cutters or "nippy cutters" ! Solder sucker (squeeze or vacuum pump type), o
Page 13 - TESTING AND ALIGNMENT
VEC-1292K Owner’s Manual Stereo Transmitter Kit 20 ENCLOSURE To install your transmitter in the VEC-1292KC matching enclosure follow these instructio
Page 15
VEC-1292K Owner’s Manual Stereo Transmitter Kit 3 keeps the tip properly tinned. If the iron is going to sit idling for long periods, wipe the tip,
Page 16 - OPERATING INSTRUCTIONS
VEC-1292K Owner’s Manual Stereo Transmitter Kit 4 Reading Capacitors: Unlike resistors, capacitors no longer use a color code for value identificati
Page 17 - IN CASE OF DIFFICULTY
VEC-1292K Owner’s Manual Stereo Transmitter Kit 5 instructions. If you can't positively identify an unfamiliar item on the basis of the informa
Page 19
VEC-1292K Owner’s Manual Stereo Transmitter Kit 7 ! ! 1. Find a 470 ohm resistor (yellow-violet-brown). Install at R8 and solder. ! ! 2. Find a
Page 20 - ENCLOSURE
VEC-1292K Owner’s Manual Stereo Transmitter Kit 8 ! ! 15. Install a .001 uF at C9 and solder. ! ! 16. Install a .001 uF at C10 and solder. ! ! 17.
Page 21
VEC-1292K Owner’s Manual Stereo Transmitter Kit 9 ! ! 25. Install a 1N4148 at D3 and solder. There are three small trimpots in your kit. Find the t
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