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TV Mast

1-1/2" PVC Pipe

32"

Mast Clamp

108"

7-8 Turns RG-58

Aluminum Tubing or Rod 

(Thick Wall)

Small Diameter

Threaded on One End

 

 

 
Check battery condition:  

Operating your radio with a weak battery may lead to 

unstable tuning (signals drifting off channel rapidly), weak or distorted audio, and motor 
boating (a low-frequency "putt-putt-putt" noise in your speaker or headphones).  Your 
radio needs a minimum of 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.  In most cases, 
you will be able to find the cause with some organized troubleshooting.  Begin your 
search with this checklist of symptoms and cures: 
 

[  ]  Does not turn on: 

 Check battery condition, snap clip, and power leads.  Also, make 

sure lead polarity is correct (red to +, black to GND).  Make sure power switch is "on". 
Also, squelch may be locked "on" (see below).  Check operating voltages. 
 

[  ]  Turns on, does not receive signals:  

Check antenna, antenna lead, and plug for 

shorted or open condition.  Also, radio may not pick up signals in metal building without  
an outdoor antenna. 
 

[  ]  Drifts off-frequency rapidly, "motorboats", weak audio:

  Symptoms of a weak 

battery or insufficient operating voltage.  Be sure to check battery voltage "under load" 
(with the radio turned on). 

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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