Pre-Alignment:
You'll need the following items to adjust your receiver:
[ ] 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.
[ ] VHF "lowband" or six-meter ham 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.
[ ] Locate coils L1 and L2. Compress each coil so the turns are close together.
[ ] Make a small flag from a scrap of tape and install it on the hex-head tuning wand.
This will help you count revolutions as you adjust L4.
[ ] Locate tunable-oscillator coil L4. Insert the tuning wand and rotate the slug counter-
clockwise so the top surface is perfectly flush with the top of the metal shield can. Now,
watching the tape flag and counting revolutions, rotate the slug
4 turns clockwise
down
into the body of the coil.
[ ] Set your voltmeter range to 10 Volts dc and connect the black (-) lead to a ground
point on the PC board. Locate
pin # 17 on
U1
(see below). This is the test point for
adjusting L5.
FL1
Test Point, 2.3 V
U1, MC13135
[ ] Set all front-panel controls on the radio counter clockwise, install a 9-volt battery on
the battery snap clip, and apply power via the
OFF/ON
switch. No antenna should be
connected during this test. With power applied, touch the red (+) voltmeter lead to pin
#17. Using a small screwdriver, adjust L5 for a reading of 2.3 volts. No further
adjustment will be required.
Final Alignment--Oscillator Coil L4:
Ideally, your kit should be mounted in the VEC-1016CK case for this procedure. If you
calibrate the radio out of its case, you may need to touch up L4 later--when the case is
added. There are several ways to calibrate your receiver. Choose the method most
compatible with the tools you have available:
