Advertisement
Quick Links
(1 Front Cover)
(2 Warranty)
(3 Introduction)
VEC-1016K 49-MHz Wireless-Band Monitor Receiver:
The 49-MHz consumer-wireless band is teaming with signals from baby monitors,
cordless phones, walkie-talkies, remote control boxes, wireless intercoms, and much
more. If you ever wanted to explore this especially-active portion of the radio spectrum,
this kit's for you. The VEC-1016K makes a great add-on baby monitor or test receiver,
and with the addition of an outdoor antenna, it pulls in weak wireless signals for miles
around--just like the best commercial scanner and monitor receivers! Building the VEC-
1016K provides excellent hands-on electronics experience. Detailed step-by-step
assembly instructions guide you through each stage of construction, and clearly-presented
alignment procedures ensure top performance without need for expensive test equipment.
Convenient electronic tuning covers just the 49-MHz band, with no need to enter long
strings of microprocessor commands to get the coverage you want. Once tuned to an
active channel, your radio's "tail-free" squelch mutes background noise between
transmissions. The VEC-1016K consumes minimal energy runs for many hours from its
self-contained 9-volt flat-pack alkaline battery. Plug in a 8-ohm speaker or use
headphones for loud-and-clear reception. All circuitry is self-contained on a rugged 3" x
3.2" pc board.
(4) 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. Well-diffused overhead lighting is
a plus, and a supplemental high-intensity desk lamp will prove especially helpful for
close-up work. Safety is an important consideration. Be sure to use a suitable high-
temperature stand for your soldering iron, and keep the work area free of combustible
clutter.
Universal Kit-building Tools: Although your particular kit may require additional items
to complete, virtually all construction projects require a work area outfitted with the
following tools and supplies:
Advertisement
Related Manuals for Vectronics VEC-1016K
Summary of Contents for Vectronics VEC-1016K
- Page 1 If you ever wanted to explore this especially-active portion of the radio spectrum, this kit's for you. The VEC-1016K makes a great add-on baby monitor or test receiver, and with the addition of an outdoor antenna, it pulls in weak wireless signals for miles around--just like the best commercial scanner and monitor receivers! Building the VEC- 1016K provides excellent hands-on electronics experience.
- Page 2 [ ] Soldering Iron (grounded-tip and temperature-controlled preferred) [ ] High-temperature Iron Holder with Cleaning Sponge [ ] Rosin-core Solder (thin wire-size preferred) [ ] Needle Nose Pliers or Surgical Hemostats [ ] Diagonal Cutters or "Nippy Cutters" [ ] Solder Sucker, Vacuum Pump, or Desoldering Braid [ ] Bright Desk Lamp [ ] Magnifying Glass Special Tools for This Kit:...
- Page 3 Omitting or Misreading a Part: This is easier to do than you might think! Always double-check to make sure you completed each step in an assembly sequence. Soldering Tips: Cleanliness and good heat distribution are the two secrets of professional soldering. Before you install and solder each part, inspect leads or pins for oxidation.
- Page 4 When you look at a resistor, check its multiplier code first. Any resistor with a black multiplier band falls between 10 and 99 ohms in value. Brown designates a value between 100 and 999 ohms. Red indicates a value from 1000 to 9999 ohms, which is also expressed as 1.0K to 9.9K.
- Page 5 Cathode Flat Side (shorter Lead) Diode Transistors: If transistors are installed incorrectly, damage may result when power is applied. Transistors in metal cases have a small tab near the emitter lead to identify correct positioning. Semiconductors housed in small plastic cases (TO-92) have an easily-identified flat side to identify mounting orientation.
- Page 6 type and arranged by value ahead of time. Use this inventory as an opportunity to sort and arrange parts so you can identify and find them quickly. [ X] Quantity Description of Item Part Designation Resistors: 22 ohm (red, red, black) 270 ohm (red, violet, brown) 470 ohm (yellow, violet, brown) 2.2K (red, red, red)
- Page 7 MC13135 IC (24 pin) MC34119 IC (8 pin) Inductors/Filters/Crystals 24" length, #22 coil wire L1,L2 .6 uH slug-tuned, shielded (yellow) L4 660 uH adjustable, shielded (black) L5 10.245 crystal 10.7 MHz ceramic filter (SFE10.7J) FL1 455 kHz ceramic filter (55D or 55F) FL2 Switches/Jacks/Misc DPDT push-button power switch RCA phono jack, pc-mounted...
- Page 8 Your kit has 16 fixed-value resistors. We'll mount these now, starting with the smallest value and moving to the largest. Before mounting each one, carefully bend both leads close to the resistor body to form right-angles, as shown below: .4" [ ] Find a 22 ohm resistor (red-red-black).
- Page 9 Locate two (2) .001-uF disc-ceramic capacitors (102). Note that there are also two multilayer type .001 uF (or 1000 pF) caps with your kit. Do not use those for C14 and C32. [ ] Install a .001-uF disc at C14 and solder. [ ] Install a .001-uF disc at C32 and solder.
- Page 10 Locate two (2) 47-pF multilayer capacitors (47 or 470). [ ] Install 47 pF at C2 and solder. [ ] Install 47 pF at C4 and solder. [ ] Find a 56-pF multilayer capacitor (56 or 560). Install at C20 and solder. [ ] Find a 220-pF multilayer capacitor (221).
- Page 11 Locate the 2SC2498 plastic transistor and note its flat side. Position at Q1, as indicated by the outline on the pc board. Gently pre-form the leads so the case is spaced approximately .15" above the pc board surface when leads are fully inserted (see below). 2498 [ ] Install the 2SC2498 at Q1 and solder.
- Page 12 [ ] Locate the 10.245 MHz crystal (frequency marked on can). Install at Y1 and solder. The front-panel controls (tuning, squelch, volume) are mounted next. Before installing these parts, inspect the type of potentiometer supplied with your kit. If the pins are located on the front side of the pot, use the front set of mounting holes on the PC board for installation.
- Page 13 7-turns #22 enameled wire 1/4" screw thread 1/2" leads stripped and tinned with solder [ ] Remove the coil by unscrewing it from the 1/4" screw threads. Compress the turns of the finished coil to make it as short as possible. Each lead must be tinned prior to installation.
- Page 14 Stress Relief Tie-wrap Finally, install receiver ICs U1 and U2. Before doing this, inspect both devices carefully and straighten any bent or crooked pins. Use extreme care during insertion, and move slowly. It's very easy to miss a pin opening and fold a IC pin underneath the body of the device.
- Page 15 [ ] Compare parts locations against the parts-placement diagram. Was each part installed where it is supposed to be? Was the correct value used? Start at one side of the board and work your way across in an organized pattern. [ ] Inspect the solder side of the board for cold-solder joins and solder bridges between tracks or pads.
- Page 16 Pre-Alignment: You'll need the following items to adjust your receiver: [ ] Insulated hex-head tuning wand to adjust L4. [ ] Small flat-blade screwdriver or tuning wand to adjust L5. [ ] Voltmeter, digital or analog, to adjust L5. [ ] VHF "lowband" or six-meter ham antenna to receive off-air signals. The instructions below describe how to pre-adjust each of the radio's coils for a ballpark setting.
- Page 17 Set the analyzer to 50.0 MHz and position a few feet from the VEC- 1016. Do not connect the analyzer directly to your VEC-1016, or damage may result. Install a 47-ohm resistor on the VEC-1016K antenna jack and follow the test procedure outlined above for using a signal generator.
- Page 18 Important Note: The VFO signal will fall 10.7 MHz below the receiver's operating frequency and may by too weak for some counters to sample (around -25 dBm). If you don't obtain a stable counter reading, use a different method of calibration. Option 4: Calibrating with a Scanner Receiver You may use a synthesized scanner or extended-coverage HT to pick up the radio's oscillator signal.
- Page 19 Power 48.8 50.0 VEC-1016K 1. POWER: Push-on/push-off switch turns unit on and off. The VEC-1016 runs on internal battery power and shouldn't be left ON for extended period when not in use. 2. TUNE: Electrically tunes receiver. Tuning range is approximately 48.8 to 50.8 MHz (the frequencies where most activity takes place).
- Page 20 7-8 volts in order to work properly. (11 In Case of Difficulty) The VEC-1016K design has been thoroughly field tested, and is known to be both reliable and "forgiving" of construction errors. If you have difficulty with your unit, the cause may be something as simple as a broken cable or a dead battery.
- Page 21 [ ] Squelch won't open when control is fully counter-clockwise: Check the value of the squelch potentiometer. It must be 100K. If a 10K pot is installed at R10, the squelch won't open. [ ] Poor sensitivity: Look for antenna problems. Also, check condition of L1, L2. If they are improperly shaped or if a lead is broken, sensitivity will be poor.
- Page 22 Vectronics. See the warranty on the inside front cover for complete instructions. (12 Theory of Operation and Technical Specifications) Technical Circuit Description: The VEC-1016K is a sensitive voltage-tunable dual-conversion NBFM receiver that includes an effective squelch circuit and gated AF-amplifier IC for speaker operation.
- Page 23 (13 Schematic) (14 Enclosure and Other Kits)
Need help?
Do you have a question about the VEC-1016K and is the answer not in the manual?
Questions and answers