ELECRAFT KAF2 Instrukcje Operacyjne Pobierz pdf (Strona 7)

Page 7

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, _R2: 100K resistors (brown-black-yellow)

b) _R3: 10K resistor (brown-black-orange)

c) _R4: 2.7Ω resistor (red-violet-gold)

d) _R5: 3.3 MOhm resistor (orange-orange-green)

e) _R6: 2K trimmer pot (3329H202 or T7YB). By factory default, the trimmer pot is usually

set to its midpoint [+/- 1 Kohm]

Once installed, setting R6 clockwise (CW) will increase the resistance and thus the volume

level of the signal fed to U2 (LM386 audio amplifier). Obviously, to decrease the volume,

R6 is to be set counterclockwise (CCW).

f) _R7: 220Ω resistor (red-red-brown) * See text bellow for notes on this resistor.

g) _C6: 0.047µF (473) capacitor

h) _C7, _C9: 0.1µF (104) capacitors

i) _C8: 0.01µF (103) capacitor

j) _C10: 0.022µF (223) capacitor

k) _Q1, _Q2: J310 FET

l) _J1: Dual row right angle header (16 pin male)

m) _J2: Dual row header (16 pin male)

n) _J3: Connector w/locking tab (4 pin male), if K2DI v.III. is used as a stand alone board.

A 4 pin male header when K2DI is used as a motherboard in conjunction with the K2DI-PCI

o) _J4: Connector w/locking tab (3 pin male)

p) _C1, _C2, _C3, _C4, _C11: 10µF 16/25v electrolytic capacitors

q) _C5: 220µF 16/25v electrolytic capacitor. If the K2DI-PCI board is to be installed, please

bend the leads so that the capacitor is installed resting on its side on the PCB.

r) _U1: CD4053BE or HEF4053BP CMOS (16 pins)

s) _U2: LM386 low voltage audio amplifier (8pins)

1 2 3 4 5 6 7 8 9 10 11 12 ... 31 32

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ELECRAFT KAF2 Instrukcje Operacyjne Strona 7