Vectronics VEC-1012K User Manual

VEC-1012K Owner’s Manual 1 INTRODUCTION If you like prowling the airwaves to gather news first-hand, the VEC-1012K is the perfect kit for you! Tune i

VEC-1012K Owner’s Manual 10 This completes installation of the 16 fixed-value resistors (the three variable resistors will be installed later). Next,

VEC-1012K Owner’s Manual 11 reason, never use force to seat a multilayer cap into the PC board. If the spacing isn't right, pre-form the leads t

VEC-1012K Owner’s Manual 12 ! ! Install 100 uF at C9 and solder. This completes installation of all capacitors. Before moving on to the next phase o

VEC-1012K Owner’s Manual 13 ! ! Locate the 455 kHz ceramic filter. This is a small black cube with three pins marked 55D or 55F. Note that it will

VEC-1012K Owner’s Manual 14 The last three coils in your radio are hand-wound from the #24 wire supplied. In addition to the #24 wire, you'll al

VEC-1012K Owner’s Manual 15 ! ! Install the 9-volt battery snap clip. The red lead is installed at (+ 9V), and the black at GND. Solder in place. !

VEC-1012K Owner’s Manual 16 This concludes the construction phase of your receiver. You deserve a break! When you come back, be ready to give your w

VEC-1012K Owner’s Manual 17 TESTING AnD ALIGNMENT PC Board Inspection: Even the most experienced builders make mistakes! Before applying power to y

VEC-1012K Owner’s Manual 18 If your radio didn't pass the turn-on test, don't despair. Odds are, you've overlooked something minor tha

VEC-1012K Owner’s Manual 19 red (+) voltmeter lead to pin #17. Using a small screwdriver, adjust L5 for a reading of 2.3 volts. No further adjustmen

VEC-1012K Owner’s Manual 2 ! Solder Sucker, Vacuum Pump, or Desoldering Braid ! Bright Desk Lamp ! Magnifying Glass Special Tools for This Kit: ! 6

VEC-1012K Owner’s Manual 20 FL1FL2U1, MC131353Test PointConnect Counter Here 1. Connect the frequency-counter ground lead to a ground point (case or

VEC-1012K Owner’s Manual 21 2. Apply power and set the VOLUME pot for a comfortable background-noise level. 3. Adjust the TUNE knob to correspond wit

VEC-1012K Owner’s Manual 22 1. POWER: Push-on/push-off switch turns unit on and off. The VEC-1012K runs on internal battery power and shouldn'

VEC-1012K Owner’s Manual 23 TV Mast1-1/2" PVC Pipe12"Mast Clamp34"6-7 Turns RG-58Brass Welding Rod (threaded on one end) IN CASE OF DI

VEC-1012K Owner’s Manual 24 Squelch won't open when control is fully counter-clockwise: Check the value of the squelch potentiometer. It must b

VEC-1012K Owner’s Manual 25 pin 23 of U1, the schematic shows that the radio's voltage-tuning circuitry is connected here. You might look for de

VEC-1012K Owner’s Manual 26 Sensitivity... .5 uV typical for usable signal Selectivity...

VEC-1012K Owner’s Manual 27 SCHEMATIC

VEC-1012K Owner’s Manual 28 ENCLOSURE

VEC-1012K Owner’s Manual 29

VEC-1012K Owner’s Manual 3 Soldering Tips: Cleanliness and good heat distribution are the two secrets of professional soldering. Before you install

VEC-1012K Owner’s Manual 4 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.

VEC-1012K Owner’s Manual 5 CathodeDiodeLED(shorter Lead) Transistors: If transistors are installed incorrectly, damage may result when power is appli

VEC-1012K Owner’s Manual 6 Resistors: " Qty Part Description Designation ! 1 22 ohm (red-red-black) R3 ! 1 270 ohm (red-violet-brown) R4 ! 1

VEC-1012K Owner’s Manual 7 ! 1 MC34119 IC (8 pin) U2 Inductors/Filters/Crystals " Qty Part Description Designation ! 1 24" length of #24

VEC-1012K Owner’s Manual 8 PARTS PLACEMENT DIAGRAM STEP-BY-STEP CONSTRUCTION In these instructions, when you see the term install, this

VEC-1012K Owner’s Manual 9 Your kit has 16 fixed-value resistors. We'll begin by mounting these now--starting with the smallest value and moving