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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).  
 

                                                     

2SC

2498

  

 
[  ]  Install the 2SC2498 at Q1 and solder.   
 
Your kit has six (6) jumper wires to install.  Each should be pre-formed from a bare 
length of discarded component lead, as shown below.  The approximate distance between 
mounting holes is given to help you pre-form each one.  When installed, each jumper 
should lay flat against the PC board. 
 

                                         

span

discarded lead end

 

 
[  ]  Make a jumper with a .2" span.  Install at JMP1 and solder. 
[  ]  Make a jumper with a .25" span.  Install at JMP2 and solder. 
[  ]  Make 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 a .3" span.  Install at L3* and solder. 
 

*Important Note:  

Inductor L3 is not used with the 49 MHz version of this kit.  A jumper 

is used in its place.  
 
Locate the 10.7-MHz ceramic filter (looks like a square disc-ceramic capacitor with three 
pins, marked 10.7J).  This part is unpolarized and may be installed either way. 
 
[  ]  Install the 10.7-MHz filter at FL1 and solder.   
 
Locate the 455-kHz ceramic filter (a small black cube with three pins marked 55D or 
55F).  This it will only fit one way on the PC board. 
 
[  ]  Install the 455-kHz filter at FL2 and solder. 
 
[  ]  Find the 3.5 mm stereo mini-headphone jack.  Install and solder at J2. 
 
[  ]  Find the RCA phono jack.  Install at J1 and solder all four taps. 
 
[  ]  Locate push-button power switch SW1.  Install at SW1 and solder. 
 

Содержание VEC-1016K

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

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