Ramsey Electronics FZ-146 Specifications download pdf (Page 73)

FX-146 • 73

Stage A: ASSEMBLY STEPS

 A1. Strip 1/8" of insulation from the heavier-gauge black wire, insert and

solder in the GROUND hole. This connection may be soldered on the

TOP side of the board as well as the solder side.

 A2. Strip 1/8" of insulation from the in-line

fuse wire and solder it to one of the S1

switch lugs of the volume control (R7).

The switch lugs are the two outermost

lugs of the 5 lugs.

 A3. Strip 1/8" of insulation from each end

of the heaviest gauge 1 conductor wire

remaining in your kit. Solder one end to

the other switch lug on R7 and the other

end to the PWR point on the PC board. MAKE SURE that ALL strands of

this wire are neatly inserted and soldered in the hole. Any stray strand

will cause a direct short when it touches the ground plane.

 A4. Install L20, the 500 uH noise filter inductor. It is the large cylinder

shaped component with wires coming from each end.

 A5. Install C42, 1500 uf, the first (and largest!) of the electrolytic

capacitors. The (+) side must be oriented as imprinted on your board,

toward L20.

 A6. Install C95, a 4.7 to 10 uf electrolytic.

 A7. Select D18, the 1N4002, the largest of the diodes used in your kit. It

has a black body with a gold band on one end. Notice the band towards

one end designating the cathode. This diode MUST be installed with its

ANODE in the ground hole nearest the back of the PC board. Solder the

anode end now, letting the diode body stand vertically on the board.

 A8b. Gently bend the cathode wire into its hole, pull it through so that it

is as short as possible with the diode standing vertically. Solder and trim

excess wire. NOTE: this is the basic method for installing all upright

parts.

 A9a. Voltage Regulator VR1 (type 7808 for 8 volts) is mounted with its

metallic back flat against the ground plane, secured by the small

machine screw and nut supplied. Identify VR1 correctly without mixing it

up with its 5-volt counterpart (VR2).

 A9b. Insert the 3 VR1 leads into the triangular set of holes while gently

bending the body back towards the board so that the mounting holes line

up. Secure VR1 to the board with the screw and nut. After VR1 is

mounted flat, solder and nip the 3 leads.

FUSE

PWR

VOLUME

OUT

GND

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Ramsey Electronics FZ-146 Specifications Page 73

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