ELECRAFT KAF2 Скачать руководство пользователя страница 2

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Parts Inventory

 The table below lists all parts in the kit. Refer to the K2 manual parts lists for photographs.

Ref.

Description

Part No.

Qty

BT1

Battery, 3V lithium, 20 mm dia., CR2032 or equivalent

E980039

1

C19

Capacitor, 33 pF ("33" or "330")

E530064

1

C9, C15, C16

Capacitor, 470 pF ("471")

E530080

3

C11, C14

Capacitor, .01 µF ("103"), 

0.1" lead spacing

E530019

2

C3, C4, C7, C8

Capacitor, .01 µF ("103"), 

0.2" lead spacing

E530009

4

C5, C6

Capacitor, .022 µF ("223")

E530056

2

C1, C2

Capacitor, .068 µF ("683")

E530081

2

C12, C13, C17, C18

Capacitor, 0.22 µF ("224")

E530079

4

C10

Capacitor, electrolytic, 10 µF

E530045

1

D1, D2

Diode, 1N5711

E560004

2

CTRL

-J1

Conn., 5 pin female, 0.1" spcg., gold

E620051

1

CTRL

-J2

Conn., 3 pin female, 0.1" spcg., gold

E620009

1

L1, L2

Inductor, 82 mH, 5%, shielded ("823")

E690015

2

P1

Conn., 5-pin male, 0.1" spcg., gold

E620052

1

P2

Conn., 3-pin male, 0.1" spcg., gold

E620053

1

Q1, Q2, Q3

Transistor, J309 JFET

E580009

3

R11, R12, R15-R17

Resistor, 220 ohms, 1/4 watt, 5% (red-red-brown)

E500002

5

R3, R7

Resistor, 470 ohms, 1/4 watt, 5% (yellow-violet-brown)

E500003

2

R13

Resistor, 910 ohms, 1/4 watt, 5% (white-brown-brown  )

E500070

1

R14

Resistor, 2.7 k, 1/4 watt, 5% (red-violet-red)

E500005

1

R9, R10

Resistor, 10 k, 1/4 watt, 5% (brown-black-orange)

E500015

2

R4

Resistor, 47 k, 1/4 watt, 5% (yellow-violet-orange)

E500067

1

R5

Resistor, 100 k, 1/4 watt, 5% (brown-black-yellow)

E500006

1

R6

Resistor, 180 k, 1/4 watt, 5% (brown-gray-yellow)

E500068

1

R8

Resistor, 510 k, 1/4 watt, 5% (green-brown-yellow)

E500069

1

R1, R2

Trimmer potentiometer, 5K ("502")

E520009

2

RP1

Resistor network, 3.9 k, 4 resistors, 8 pins

E510000

1

S1

Miniature slide switch, DPDT

E640009

1

U1

IC, quad low-noise op-amp, LM837N

E600037

1

U2

IC, programmed microcontroller, PIC16C621A-04/P

E610009

1

U3

IC, real-time clock, NJU6355ED

E600038

1

U4

IC, voltage regulator, 6V, 2.5%, ZR78L06C

E600017

1

W1

Conn., 2-pin male, 0.1" spacing

E620054

1

X1

Crystal, cylindrical, 32.768 kHz

E660015

1

Z1

Ceramic resonator, 4 MHz, 3 pins

E660001

1

MISC

Jumper, 2-pin shorting (for W1)

E620031

1

MISC

KAF2 PC board

E100128

1

MISC

Socket for BT1

E980040

1

MISC

IC socket (for U2), 18 pins

E620031

1

HDWR

Standoff, male-female, 1/2" long x 1/4" dia, 4-40 thd

E700057

1

Содержание KAF2

Страница 1: ...the K2 front panel selects either O F F LPF only A F 1 first CW filter stage or A F 2 both stages The operator can choose to treat both CW filter stages as a single setting A F 2 by installing jumper...

Страница 2: ...istor 470 ohms 1 4 watt 5 yellow violet brown E500003 2 R13 Resistor 910 ohms 1 4 watt 5 white brown brown E500070 1 R14 Resistor 2 7 k 1 4 watt 5 red violet red E500005 1 R9 R10 Resistor 10 k 1 4 wat...

Страница 3: ...with outlines of the ICs U1 U4 and most other components is the top the side with the KAF2 label is the bottom If an assembly step does not specify top or bottom the component should be installed on t...

Страница 4: ...16 Trim the leads of C15 and C16 as short as possible preferably flush with the board On the top side install the 068 F capacitors 683 __C1 __C2 Install electrolytic capacitor C10 10 F The lead of C10...

Страница 5: ...ded metal surface Install transistors Q1 Q2 and Q3 J309 as indicated by their outlines The installed height of the transistors should be no more than 3 8 9 mm Use a minimum of soldering time 1 2 secon...

Страница 6: ...it is installed in the socket at this time remove it Install cylindrical crystal X1 vertically between U3 and BT1 The exposed lead length should be 0 1 2 5 mm or less Be careful with the crystal s le...

Страница 7: ...s of the resistors right at the body then remove the leads one at a time Use long nose pliers to hold the lead then heat the joint until the lead slides out with very little pulling force If R18 and R...

Страница 8: ...oard could be damaged J1 J2 MCU U6 KAF2 i If the standoff does not line up with the hole near the middle of the KAF2 module you may have the pins of J1 and J2 shifted by one position Use the original...

Страница 9: ...ld see A F 1 on the display indicating that the first band pass filter section has been enabled The receiver sound should change due to the narrower bandwidth The signal may decrease in amplitude Usin...

Страница 10: ...ld see a time display HH MM SS The time may not be changing at this point and may be set to 01 01 01 or to a random time Note The receiver is not muted when time is displayed so you may hear microcont...

Страница 11: ...ement in skirt selectivity This can really help with DXing QRP contests and other situations where much of the activity takes place right at the noise floor When A F 2 is selected overall gain will be...

Страница 12: ...notes Bypassing the Audio Filter The audio filter can be bypassed by setting S1 on the KAF2 module to the OUT position In this setting the real time clock will still work if enabled but the low pass...

Страница 13: ...dule processors which generates noise that is audible at some frequencies The K2 does not mute the receiver when date or time is being displayed because the operator may want to use WWV or some other...

Страница 14: ...tch signals and noise Shielded inductors and a balanced filter topology are used to prevent noise and hum pickup The passive filter contributes no noise of its own and is located after all active filt...

Страница 15: ...15 This page intentionally left blank...

Страница 16: ...J1 must be removed when the KAF2 is installed 3 9K RP1 1 2 3 9K RP1 7 8 C13 C12 C14 C15 12V 82 mH 82 mH LPF1 LPF2 KAF2 Audio Filter RTC A R11 R12 220 220 910 5 6 7 U1B 10 9 8 U1C R4 R5 R6 R8 R3 R7 R1...

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