ELECRAFT KAF2 Instruções de Operação descarregar pdf (Página 13)

Page 13

Construction Manual for the K2DI v.III and K2DI-PCI boards © EA3BLQ - Revision June 2005

ASSEMBLY INSTRUCTIONS:

Please note that all the soldering rules, warnings and tips you have learned and used when

assembling your K2, are to be applied in the assembly of this circuit too.

Install and solder components in the following order:

a) _R1 _R3: 470 Ω resistors (yellow-violet-brown)

b) _R8: 1K resistor (brown-black-red)

c) _R5: 10K resistor (brown-black-orange)

d) _R4, _R7: 100K resistors (brown-black-yellow)

e) _R6: 3M3 resistor (orange-orange-green)

f) _D1, _D2, _D3: 1N4148 High speed diode

g) _C1: .1µF capacitor (104)

h) _C5: .47µF capacitor (474)

i) _C3, _C4: 4.7µF electrolytic or tantalum capacitor

j) _C2: 10µF electrolytic or tantalum capacitor

k) _P1: 4 pin female header (to be installed on the bottom side of the board and

soldered on the top) (*)

l) _P2: 2 pin female header (to be installed on the bottom side of the board and

soldered on the top) (*)

m) _R2: 10K POT trimmer

n) _Q1: NPN General purpose transistor (PN2222A)

o) _U1: Optocoupler (4N32)

p) _U2: Dual operational amplifier (TL062)

q) _LED1: Optional PTT on LED (red). Useful if the board is installed as a stand alone

External Computer Interface.

r) _TR1, _TR2: 600:600Ω Coupling transformer (Atech ATS-075). Mouser’s catalogue

part # 421-ATS075 (page 542)

s) _J1: Connector with locking tab (3 pin male)

t) _J2: Connector with locking tab (4 pin male)

u) _J3: Header (2 pin male)

v) _J4: Header (3 pin male)

(*) Should the board be used as a stand alone External Computer Interface, these two

female headers ought to be substituted by a 4 and 2pin male connectors installed on the

top face of the board and soldered on the bottom

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ELECRAFT KAF2 Instruções de Operação Página 13