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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 $18.00 (½ hour rate) plus $7.00 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.  In the event your repair will require 
more than an hour to fix (or $36.00, subject to change), our technicians will contact you in 
advance by telephone before performing the work.  Defective units should be shipped prepaid 
to: 

Vectronics 
1007 HWY 25 South 
Starkville, MS  39759 

Содержание VEC-841K

Страница 1: ...ific 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 cha...

Страница 2: ...it well and include the minimum payment plus shipping and handling charges 25 00 total No work can be performed without pre payment Also provide a valid UPS return address and a day time phone number...

Страница 3: ...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 constr...

Страница 4: ...orm when a trail of excess solder shorts pads or tracks together see Solder Tips below 4 Omitting or Misreading a Part This is easier to do than you might think Always double check to make sure you co...

Страница 5: ...Digit 2nd Digit Multiplier Tolerence Black 0 tens Brown 1 hundreds Red 2 K Orange 3 10K Yellow 4 100K Green 5 1Meg Blue 6 Violet 7 Gray 8 White 9 Silver 10 Gold 5 Resistor Color Code gold or silver Wh...

Страница 6: ...stors 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...

Страница 7: ...ease go through the parts bag to identify and inventory each item on the checklist before you start building If any parts are missing or damaged refer to the warranty section of this manual for replac...

Страница 8: ...olystyrene capacitors 1000J C5 C6 C7 C8 1 100uF electrolytic capacitor C12 2 470uF electrolytic capacitor C11 C14 1 10uF electrolytic capacitor radial leads C13 2 10uF electrolytic capacitor axial lea...

Страница 9: ......

Страница 10: ...ild your kit please refer back to the section titled Tools and Supplies If you re ready to begin now here we go The directions use two sets of check boxes Check one when a step is complete and use the...

Страница 11: ...let red Carefully bend the leads close to the resistor body as in Step 1 Insert at R18 solder in place and trim the leads 12 Locate resistor R33 This is a 4 7K resistor yellow violet red Carefully ben...

Страница 12: ...yellow orange Carefully bend the leads close to the resistor body as in Step 1 Insert at R3 solder in place and trim the leads 24 Locate resistor R22 This is a 24K resistor red yellow orange Carefully...

Страница 13: ...re made of a polystyrene type material Avoid overheating these components when soldering to prevent melting the capacitor body 1 Locate capacitor C5 1000pF The is a polystyrene capacitor and will be m...

Страница 14: ...horizontal trimpot 4 Insert R24 into its mounting holes until it stops making sure that all three 3 legs are inserted into the board Bend the legs outward to secure the part to the board Solder in pla...

Страница 15: ...ate capacitor C10 10uF This is an electrolytic capacitor and will be marked 10uF actual value in uF Capacitor C10 is the type of capacitor with leads coming out of the ends of the component like a res...

Страница 16: ...agram for the location of points JMP7A and JMP7B Once installed solder in place and trim the leads 13 Locate the remaining piece of the 6 insulated wire Measure and cut one 1 piece 1 long then remove...

Страница 17: ...iagram for proper orientation Be sure not to bend any of the pins underneath the IC body and that all pins are inserted into the socket 6 Locate the LM380 audio amplifier integrated circuit Insert it...

Страница 18: ...ue used Start at one side of the board and work your way across in an organized pattern Inspect the solder side of the board for cold solder joints and solder bridges between tracks or pads Use a magn...

Страница 19: ...follow each step as it is written and laid out for you This will ensure that filter will perform well Well if you are ready then let s get started Test Equipment Needed The following is the test equip...

Страница 20: ...dure This here is the actual test and alignment procedure Please follow each step as it is written and laid out for you This will ensure that the procedure is done correctly Important Note If you are...

Страница 21: ...Frequency control R26 on the VEC 841K set the signal displayed on the scope to it s absolute MINIMUM amplitude 14 Set SW1 on the VEC 841K to the OUT position PEAK 15 Using the small plastic alignment...

Страница 22: ...hone jack J4 which requires an RCA phono plug The center pin of the RCA phono is positive while the outer shell is ground Next connect the POSITIVE lead of the external speaker to the TIP of a 3 5mm m...

Страница 23: ...an actually notch or null out nearby adjacent signals and interference You can also use a pair of mono headphones with a 1 4 mono plug attached Connect your headphones to the phones jack J5 IN CASE OF...

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Страница 26: ...VEC 841K Owner s Manual Tunable SSB CW Audio Filter Kit 24...

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