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(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: 
 
 

Summary of Contents for VEC-1016K

Page 1: ...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...

Page 2: ...me but they typically act very differently in an electronic circuit Same for capacitors a device marked 102 or 001 uF may have very different operating characteristics from on marked 103 or 01uF Insta...

Page 3: ...may fill in behind the lead as you extract it especially if you are working on a double sided board with plate through holes Should this happen try heating the pad again and inserting a common pin int...

Page 4: ...consult the parts list for specific color code information Reading Capacitors Unlike resistors capacitors no longer use a color code for value identification Instead the value or a 3 number code is pr...

Page 5: ...cated by a dot or square marking located on one end of the device A corresponding mark will be silk screened on the PC board and printed on the kit s parts placement diagram To identify specific IC pi...

Page 6: ...own black yellow R1 R9 R13 R19 2 10K potentiometer R6 R16 1 100K potentiometer R10 Capacitors 1 3 pF disc ceramic 3 or 309 C3 2 001 uF disc ceramic 102 C14 C32 3 01 uF disc ceramic 103 C6 C13 C25 1 05...

Page 7: ...locate identify and insert the part into its mounting holes on the PC board This includes pre bending or straightening leads as needed so force is not required to seat the part Once a component is mo...

Page 8: ...ellow violet red Install at R17 and solder Find a 6 8 K resistor blue gray red Install at R5 and solder Find a 10 K resistor brown black orange Install at R18 and solder Locate two 2 39 K resistors or...

Page 9: ...r Install 1 uF at C21 and solder Install 1 uF at C22 and solder Install 1 uF at C24 and solder Install 1 uF at C26 and solder Install 1 uF at C29 and solder There are 11 multilayer capacitors provided...

Page 10: ...he markings on the capacitor body are unclear the plus lead is always the longer of the two Locate two 2 1 uF electrolytic caps Install 1 uF at C23 and solder Install 1 uF at C28 and solder Locate two...

Page 11: ...another jumper with a 25 span Install at JMP3 and solder Make a jumper with a 3 span Install at JMP4 and solder Make a second jumper with a 3 span Install at JMP5 and solder Make a third jumper with...

Page 12: ...and solder Locate the 6 uH shielded slug tuned VFO coil yellow form 2 pins Position at L4 making sure the pins and shield can tabs are straight and aligned with their mounting holes Install the 6 uH c...

Page 13: ...t to start the enamel stripping process scrape the enamel away with an Exacto knife before tinning Make sure both leads are clean and brightly tinned all the way around before installing Dress tin and...

Page 14: ...d end to correspond with the key marked on the pc board at U1 Carefully align the pins with the U1 mounting holes before inserting Install the MC13135 IC at U1 and solder each pin in place Inspect the...

Page 15: ...before moving on If a careful inspection revealed that everything is A OK you re now ready for the moment of truth Initial Checkout To check out your kit you ll need a 9 volt flat pack type alkaline...

Page 16: ...ow watching the tape flag and counting revolutions rotate the slug 4 turns clockwise down into the body of the coil Set your voltmeter range to 10 Volts dc and connect the black lead to a ground point...

Page 17: ...r Don t mistake this signal for your signal generator s output signal Option 2 Calibrating with a Antenna Analyzer Any MFJ or Autek antenna analyzer with VHF coverage may be used to generate an alignm...

Page 18: ...pot to correspond with the product s assigned operating frequency Slowly tune L4 until you receive the signal at the correct spot on the dial Aligning L1 L2 for maximum receiver sensitivity If coils...

Page 19: ...ncies where most activity takes place 3 SQUELCH Adjusts threshold point for cutting off receiver background noise 4 VOLUME Adjust audio amplifier gain a comfortable listening level Antennas For local...

Page 20: ...our unit the cause may be something as simple as a broken cable or a dead battery In most cases you will be able to find the cause with some organized troubleshooting Begin your search with this check...

Page 21: ...radio s battery is fresh the chart readings were made using a 9 0 volt power source Using the red lead check the voltage on each IC pin and compare it against the voltage chart below Readings should b...

Page 22: ...controlled at 10 245 MHz drives the 2nd mixer for converting signals to 455 kHz FL2 establishes the radio s message channel bandwidth prior to 100 dB of signal amplification and limiting in the 2nd I...

Page 23: ...13 Schematic 14 Enclosure and Other Kits...

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