background image

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 VVhen 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 (1/2

 

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:

When shipping, pack your kit 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 where you may be reached.

Содержание VEC-820K

Страница 1: ...re 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...

Страница 2: ......

Страница 3: ...istor radio batterv TOOLS AND SUPPLIES Construction Area Kit construction requires a clean smooth and well ighted 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...

Страница 4: ...mponent lead or pad Solder bridges form 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 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...

Страница 5: ......

Страница 6: ...ntation is indicated by the positioning of the cooling tab Integrated Circuits Proper IC positioning is indicated 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 pin numbers for testing purposes see the diagram below Pin numbers always start at the keyed e...

Страница 7: ...ed 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 6 24 3K ohm resistor red yellow orange brown R9 R10 R12 1 R12 R13 R14 4 681 K resistor blue gray brown orange R5 R6 R7 R8 4 1 82M ohm resistor brown gray red yellow RI R2 R3 R 4 8 1000 pF poly capacitor 1000J C1 C2 ...

Страница 8: ......

Страница 9: ... step is complete and use the other for double checking your work before operation Important Note Capacitors Cl C8 are made of a polystyrene type material Avoid overheating these components when soldering to prevent melting the capacitor body 1 Locate capacitor C 1 1000pF This is a polystyrene capacitor and will be marked with a 1000P on the body actual value in pF 2 Mount C l and solder both lead...

Страница 10: ...arefully install C9 ensuring not to chip the ceramic material Once installed then solder in place 11 Locate resistor R1 This is a 1 82M resistor brown gray red N ellow brown Carefully bend the leads close to the resistor body to form right angles see following diagram 12 Insert RI into its mounting holes so the resistor body rests against the board Solder in place and trim the leads 13 Locate resi...

Страница 11: ...fully bend the leads close to the resistor body as in Step 11 24 Insert R7 into its mounting holes so the resistor body rests against the board Solder in place and trim the leads 25 Locate resistor R8 This is a 681K resistor blue gray brown orange broL n Carefully bend the leads close to the resistor body as in Step 1 l 26 Insert R8 into its mounting holes so the resistonbody rests against the boa...

Страница 12: ...to its mounting holes so the resistor body rests against the board Solder in place and trim the leads 37 Locate resistor R14 This is 24 3K resistor red yellow orange red brown Carefully bend the leads close to the resistor body as in Step 11 38 Insert R14 into its mounting holes so the resistor body rests against the board Solder in place and trim the leads Save the excess trimmed pieces of resist...

Страница 13: ...silk screened 1 on the circuit board Solder in place and trim the excess lead 50 Take one 3 piece of insulated wire and insert one end into the hole silk screened 2 on the circuit board Solder in place and trim the excesslead 51 Take one 3 piece of insulated wire and insert one end into the hole silk screened 3 on the circuit board Solder in place and trim the excess lead 52 Locate the battery sna...

Страница 14: ...rim the excess lead from the switch contact 63 Connect the other end of the insulated wire located at 1 on the circuit board at Point F on SW I Solder in place and trim the excess lead from the sNvtich contact 64 Cut a 1 1 4 piece of wire from one of the remaining 3 65 Using the wire strippers remove a 1 4 piece of the insulation from each end of the 1 1 4 wire 66 Connect the t t 4 piece of wire b...

Страница 15: ...rack area If you suspect a solder bridge hold the board in front of a bright light for a better view All joints should be smooth and shiny indicating good solder wetting and flow Resolder any beaded or dullappearing connections If you find a construction error and need to remove a part or two it will be easier if you have the right tools One very convenient item for freeing soldered in parts is a ...

Страница 16: ...he narrowest filter cutoff while the 180 hertz cutoff is the second position from the left and is the N idest filter cutoff Probably the best method of seeing if the VEC 820K is working or not is to listen to some on the air CW signals Then using SW1 select the filter cutoff position that best cleans up the signal being received If you are trying to pick one signal out of a very tight band pile up...

Страница 17: ...on SW 1 Apply the negative side of the audio to the negative side of the battery snap Please refer to the Parts Placement section Figure 2 for the location of Point A on SW 1 Nest connect the POSITIVE lead of the external speaker to the NEGATIVE end of C11 Please refer to the Parts Placement section Figure 3 for the location of C 11 Connect the NEGATIVE lead of the external speaker to the point la...

Страница 18: ...alled properly a wrong value part in place of another or a broken part A close inspection at this point will reveal some accidental mistake Intermittent Filter Operation A filter that operates intermittently may have poor solder connections a problem Nyith broken wires or low voltage power source Self oscillation may be caused b_v a defective U1 or U2 Also check for dirty or intermittent switch op...

Страница 19: ...king good signal copying possible The center frequency is betNNeen 750 800 hertz The filter is able to drive an 8 ohm speaker or Specifications Bandwidth 80 Hz 110 Hz 180 Hz sNNitch Skirt Re_jcolon At least 60dB do Nn 1 octave from center frequency for 80 Hz bandxN ENCLOSURE Vectronics has designed a matching enclosure just for your CIF Audio Filler Kit The matching enclosure is an all includes kn...

Страница 20: ......

Отзывы: