vec-830k.pdf

IMPORTANT WARRANTY INFORMATION! PLEASE READ

Return Policy on Kits When Not Purchased Directly From Vectronics: Before continuing any

further with your VEC kit check with your Dealer about their return policy. If your Dealer

allows returns, your kit must be returned before you begin construction.

Return Policy on Kits When Purchased Directly From Vectronics: Your VEC kit may be

returned to the factory in its pre-assembled condition only. The reason for this stipulation is,

once you begin installing and soldering parts, you essentially take over the role of the device's

manufacturer. From this point on, neither Vectronics nor its dealers can reasonably be held

accountable for the quality or the outcome of your work. Because of this, Vectronics cannot

accept return of any kit-in-progress or completed work as a warranty item for any reason

whatsoever. If you are a new or inexperienced kit builder, we urge you to read the

manual carefully and determine whether or not you're ready to take on the job. If you

wish to change your mind and return your kit, you may--but you must do it before you begin

construction, and within ten (10) working days of the time it arrives.

Vectronics Warrants: Your kit contains each item specified in the parts list.

Missing Parts: If you determine, during your pre-construction inventory, that any part is

missing, please contact Vectronics and we'll send the missing item to you free of charge.

However, before you contact Vectronics, please look carefully to confirm you haven't misread

the marking on one of the other items provided with the kit. Also, make certain an alternative

part hasn't been substituted for the item you're missing. If a specific part is no longer available,

or if Engineering has determined that an alternative component is more suitable, Vectronics

reserves 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 resilient, and defective

components are rare. However, if you discover an item during your pre-construction inventory

that's obviously broken or unserviceable, we'll replace it. Just return the part to Vectronics at

the address below accompanied with an explanation. Upon receipt, we'll test it. If it's defective

and appears unused, we'll ship you a new one right away at no charge.

Missing or Defective Parts After You Begin Assembly: Parts and materials lost or damaged

after construction begins are not covered under the terms of this warranty. However, most parts

supplied with VEC kits are relatively inexpensive and Vectronics can replace them for a

reasonable charge. Simply contact the factory with a complete description. We'll process your

order quickly and get you back on track.

Factory Repair After You Begin Assembly: Kits-in progress and completed kits are

specifically excluded from coverage by the Vectronics warranty. However, as a

service to customers, technicians are available to evaluate and repair malfunctioning kits for a

minimum service fee of 518.00 (1/2 hour rate) plus 57.00 shipping and handling (prices subject

to change). To qualify for repair service, your kit must be fully completed, unmodified, and the

printed circuit board assembled using rosin-core solder. 1n the event your repair will require

more than an hour to fix (or 536.00, subject to change), our technicians will contact you in

advance by telephone before performing the work. Defective units should be shipped prepaid

Vectronics

1007 HWY 25 South

Starkville, MS 39759

When shipping, pack your kit well and include the minimum payment plus shipping and

handling charges (525.00 total). No work can be performed without pre-payment. Also, provide

a valid UPS return address and a day time phone number where you may be reached.

VEC-830K Instruction

Single Side-Band Filter Kit

INTRODUCTION

Thank you for purchasing the VEC-830K Single Side-Band Filter kit. The

VEC-830K is a four stage, switch selectable filter, that will make "cleaning

up" Single Side-Band signals effortless and easy. With the VEC-830K you

bring up any hard to hear signal out of a "band pile up," for easy listening, or

get rid of unwanted, annoying signals. The VEC-830K also features a

headphone output that will allow the use of standard mono headphones.

Although small in size, the VEC-830K is high on performance and reliability.

Powered from a 9volt transistor batten', the VEC-830K will provide you with

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 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:

VEC-830K Instruction Manual

Single Side-Band Filter Kit

BEFORE YOU START BUILDING

Experience shows there are jour common mistakes builders make. Avoid these,

and your kit will probably work on the first try! Here's what they are:

1. Installing the Wrong Part: It always pays to double-check each step. A 1K

and a 10K resistor may look almost the same, but they may act very

differently in an electronic circuit! Same for capacitors--a device marked

102 (or .001 uF) may have very different operating characteristics from one

marked 103 (or .01uF).

2. Installing Parts Backwards: Always check the polarity of electrolytic

capacitors to make sure the positive (+) lead goes in the (+) hole on the

circuit board. Transistors have a flat side or emitter tab to help you identify

the correct mounting position. ICs have a notch or dot at one end indicating

the correct direction of insertion. Diodes have a banded end indicating

correct polarity. Always double-check--especially before applying power to

the circuit!

3. Faulty Solder Connections: Inspect for cold-solder 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 trail of excess solder

shorts pads or tracks together (see Soldering Tips below).

4. 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. If the metal surface is dull, sand with fine emery paper until shiny.

Also, clean the oxidation and excess solder from the soldering iron tip to

ensure maximum heat transfer. Allow the tip of your iron to contact both the

lead and pad for about one second (count "one-thousand-one") before feeding

solder to the connection. Surfaces must become hot enough for solder to flow

smoothly. Feed solder to the opposite side of the lead from your iron tip--solder

will wick around the lead toward the tip, wetting all exposed surfaces. Apply

solder sparingly, and do not touch solder directly to the hot iron tip to promote

rapid melting.

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,

VEC-83 OK Instruction Manual

Single Side-Band Filter

I0Ks, etc.). Next, sort each group by specific value (1K, 2.2K, 4.7K. etc.). This

procedure makes the inventory easier, and also makes locating specific parts

more convenient later on during construction. Some builders find it especially

helpful to arrange resistors in ascending order along a strip of double-sided tape.

Some VEC kits may contain molded chokes which appear, at first glance, similar

to resistors in both shape and band marking. However, a closer look will enable

you to differentiate between the two--chokes are generally larger in diameter and

fatter at the ends than resistors. When doing your inventory, separate out any

chokes and consult the parts list for specific color-code information.

Reading Capacitors:

Unlike resistors, capacitors no longer use 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 of value. Small-value capacitors are characterized in pF (or

pico-Farads), while larger values are labeled in uF (or micro-Farads). The

transition from pF to uF occurs at 1000 pF (or .001 uF)*. Today, most

monolithic and disc-ceramic capacitors are marked with a three-number code.

The first two digits indicate a numerical value, while the last digit indicates a

multiplier (same as resistors).

Electrolytic capacitors are always marked in uF. Electrolytics are polarized

devices and must be oriented correctly during installation. If you become

confused by markings on the case, remember the uncut negative lead is slightly

shorter than the positive lead.

Diodes:

Diodes are also polarized devices that must be installed correctly. Always look

for the banded or cathode end when installing, and follow instructions carefully.

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