background image

VEC-830K Instruction Afanual

Single Side-Band Filter

Desoldering Tips:

If you make a mistake and need to remove a part, follow these instructions
carefully! First, grasp the component with a pair of hemostats or needle-nose
pliers. Heat the pad beneath the lead you intend to extract, and pull gently. The
lead should come out. Repeat for the other lead. Solder 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 into the hole. Solder won't stick to the pin's chromium
plating. When the pad cools, remove the pin and insert the correct component.
For ICs or multi-pin parts, use desoldering braid to remove excess solder before
attempting to extract the part. Alternatively, a low-cost vacuum-bulb or spring-
loaded solder sucker may be used. Parts damaged or severely overheated during
extraction should be replaced rather than reinstalled.

Work Habits:

Kit construction requires the ability to follow detailed instructions and, in many
cases, to perform new and unfamiliar tasks. To avoid making needless mistakes,
work for short periods when you're fresh and alert. Recreational construction
projects are more informative and more fun when you take your time. Enjoy!

Sorting and Reading Resistors:

The electrical value of resistors is indicated by a color code (shown below). You
don't have to memorize this code to work with resistors, but you do need to
understand how it works:

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. An orange multiplier band
designates 10K to 99K, etc. To sort and inventory resistors, first separate them
into groups by multiplier band (make a pile of 10s, 100s, Ks,

Содержание VEC-830K

Страница 1: ...rves the right to make substitutions at any time In most cases these changes will be clearly noted in an addendum to the manual Defective Parts Today s electronic parts are physically and electrically...

Страница 2: ...th many hours of use TOOLS AND SUPPLIES Construction Area Kit construction requires a clean smooth and welllighted area where you can easily organize and handle small parts without losing them An inex...

Страница 3: ...older joints and solder bridges Cold solder joints happen when you don t fully heat the connection or when metallic corrosion and oxide contaminate a component lead or pad Solder bridges form when a t...

Страница 4: ...sed Parts damaged or severely overheated during extraction should be replaced rather than reinstalled Work Habits Kit construction requires the ability to follow detailed instructions and in many case...

Страница 5: ...a color code for value Instead the value or a 3 number code is printed on the body identification As with resistors it s helpful to sort capacitors by type and then to arrange them in ascending order...

Страница 6: ...so use this type packaging Larger plastic transistors and voltage regulators use a case backed with a prominent metal tab to dissipate heat T 220 Here orientation is indicated by the nositionine of th...

Страница 7: ...rganized by 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 Qty Part Description Designation 2 100K oh...

Страница 8: ...VEC 830K Instruction Manual Single Side Band Filter Kit PARTS PLACEMENT DIAGRAM Figure 1...

Страница 9: ...will be inserted on the silk screen side of the board If you have last minute questions about what you need to build your kit please refer back to the section titled Tools and Supplies If you re ready...

Страница 10: ...e leads 14 Locate resistor R8 This is a 1 2M ohm resistor brown red greengold 15 Insert R8 into its mounting holes so the resistor body rests against the board Solder in place and trim the leads 16 Lo...

Страница 11: ...70J actual value in pF Carefully install C8 in the same manner as C7 solder in place and trim the leads 26 Locate two 2 6 insulated wires Cut these wires in halt making four 4 3 pieces 27 Using the wi...

Страница 12: ...ll the IC socket at the U 1 location on the circuit board Be careful to orient the socket correctly according to the Parts Placement section Figure 1 41 Carefully bend over the four corner pins of the...

Страница 13: ...act vet 52 Locate one 1 6 insulated wire and cut it in half making two 2 3 wires 53 Cut one 1 3 wire in half making two 2 11 2 pieces 54 Using the wire strippers remove about 1 4 of the insulation fro...

Страница 14: ...o replace it than risk reusing it Finally rosin flux can absorb moisture which may cause a problem for some electronic equipment To remove flux use isopropyl alcohol or 95 grain alcohol and an old too...

Страница 15: ...G INSTRUCTIONS You may use the VEC 830K with any communications receiver or scanner The VEC 830K requires a 9 volt battery power source There are a few items that you will need to operate the VEC 830K...

Страница 16: ...uires a very close and careful inspection of all work Please go back through all steps of assembly and inspection referring to the Parts Placement Figures 1 2 and 3 Most of the time there will be a pa...

Страница 17: ...rth filter stages Unlike passive filters using inductors no impedance matching is necessary for optimum performance Also there is no insertion loss within the passband This results in minimum amplitud...

Страница 18: ......

Отзывы: