Only high-quality components and proven circuit designs are used i Vectronics
kits. In very rare instances is a defective component the source of problem.
Replacement of defective parts is covered in the Warranty section Ninety-five
percent of the kits returned for factory repair are due to solderin problems or
parts in the wrong locations. We advise repeating the assembl instructions step-
by-step, looking for mistakes or soldering problems. Be especially wary of
electrolytic capacitors and semiconductors. Kit builders often miss obvious
mistakes. What is needed is a "fresh" set of eyes. Enlist a friend to go over your
work.
Always check the obvious! Is the power supply plugged in? Is the power switch
Low range: Check power supply voltage, alignment of C11 and proper jumper
configuration for antenna matching circuit. Check antenna wire connection at
ANTI on
c board. Antenna not located in an o
timum location.
Audio distorted: Gain control set too high. Capacitor C11 improperly tuned, or
wron
um
er confi
uration for antenna matchin
circuit.
Loud hum on audio: Bad audio cables, check for broken shield wires. Power
su
l
filterin
oor.
Osciilator dead: CMOS device U1
4049A
defective.
Carrier signal, no audio: Bad audio cables, RI set to minimum. IC U2 (LM386)
defective.
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