Vectronics VEC-422K User Manual

Page 17

VEC-422K Owner's Manual

SCA Decoder Kit

The front-panel controls are mounted next. Before installing these parts, inspect
the potentiometer supplied with your kit. If the pins are located on the front side
of the pot, use the front set of mounting holes on the PC board for installation. If
the pins are on the rear, use the rear set of mounting holes (see below). If
necessary, use side cutters to remove the key tab from the side of each pot prior
to installation.

Rear pins use rear holes.

Front pins use front holes.

Nip off tab.

Note: The resistance value is stamped on the front body for the rear-pin style
potentiometers.

! ! 5."Locate the 10K-ohm variable resistor. Install and solder at location

R17 (volume control).

! ! 6."Locate the 50K-ohm variable resistor. Install and solder at location

R16 (tuning control).

Locate the battery clip.

! ! 7."Solder the red lead (positive) to the (+) location on the PC board.

! ! 8."Solder the black lead (negative) to the (-) location on the PC board.

! ! 9."Find the 4” nylon wire tie wrap. Secure the battery leads to the stress

relief hole on the PC board using the nylon tie wrap. Trim excess tie
length.

+ red

- black

Tie wrap

SW1