Vectronics VEC-1002K - Manual (Page 20)

VEC-1002K Owner's Manual 2 Meter FM Receiver Kit
18
Initial Checkout:
To check out your kit you'll need a 9-volt flat-pack type alkaline battery and a 8-
ohm extension speaker (or monaural headphones) outfitted with a 3.5-mm mini
plug. Make sure the radio's power switch is OFF (button out) before loading the
battery. Plug in speaker or phones and turn all potentiometer controls fully
counter-clockwise.
1. Apply power (button in).
2. Turn up VOLUME (right-hand pot) clockwise. You should hear a rushing
sound, indicating the receiver and audio amplifier are functioning properly.
3. Slowly advance the SQUELCH (center pot) clockwise. The rushing sound
should stop abruptly around mid-range, indicating the squelch circuit is
working.
If your radio passed its turn-on test, congratulations! You're well on your way to
success, and ready for pre-alignment.
If your radio didn't pass the turn-on test, don't despair. Odds are, you've
overlooked something minor that's easy to correct. Take a break, come back
fresh, and carefully repeat the QC inspection. If no undiscovered errors turn up
during your second inspection, proceed to the "In Case of Difficulty" section of
this manual for troubleshooting advice.
Pre-Alignment:
You'll need the following items to adjust your receiver:
•
6-32 screw, at least 3/4" long, to check the shaping of L1, L2.
•
Insulated hex-head tuning wand to adjust L4.
•
Small flat-blade screwdriver or tuning wand to adjust L5.
•
Voltmeter, digital or analog, to adjust L5.
•
Two-meter antenna to receive off-air signals.
The instructions below describe how to pre-adjust each of the radio's coils for a
ballpark setting. This procedure will make final alignment easier.
1. Make sure the unit is off via the OFF/ON switch.
2. Locate coils L1 and L2. Thread a 6-32 screw inside the windings of each
coil to check for sizing and spacing. If each winding conforms to the 6-32
diameter and thread-pitch, the coil is wound correctly. If not, make any
needed adjustments. Spread the turns so they are exactly 1 wire-width apart.