MFJ MFJ-415B Instruction Manual Download Page 9

MFJ-415B CW Adapter 

 

Instruction Manual 

Parts List 

Designator Part 

Number 

Description 

C101 

203-0013 

Capacitor, Electrolytic, 22 uF, 50V. 

C102 

200-0004 

Capacitor, Disc Ceramic, .01 uF, 25V 

C103 

204-0001 

Capacitor, Trimmer, 3-10 pF, 250V. 

C104 

205-0033 

Capacitor, Multilayer, 33 pF, 50V. 

C109 

200-1004 

Capacitor, Disc Ceramic, 4.7 pF, 50V. 

C110 

200-2024 

Capacitor, Disc Ceramic, .001 uF, 50V. 

D101 

315-2104 

Diode, Varactor, MV2104 

D102, D103 

300-0003 

Diode, Switching, 1N4148, 50 PIV 

J101 

612-3002 

Header Connector, 2-Position 

J102 

612-3004 

Header Connector, 4-Position 

J103 

601-5005 

Jack, Stereo, PCB, 3.5 mm 

J104 

612-0102 

Header, Pin, Straight, .375, .1, 2 Position 

J105 

612-0103 

Header, Pin, Straight, .375, .1, 3-Position 

K101 

408-1011 

Relay, Reed Type, 12-V, SPST 

L101 

402-2710 

Inductor, Coilcraft Slot-Ten-03-10, 22 uH 

PZ1 

410-1204 

2.8 kHz Piezzo Buzzer 

Q1, Q3 

305-0002 

Transistor, General Purpose PNP, 2N3906 

Q2 

305-0001 

Transistor, General Purpose NPN, 2N3904 

R101, R113 

100-4470 

Resistor, Film, 47K Ohms, 1/4 watt, 5% 

R102 

133-5100 

Resistor, Trimpot, 100K Ohms 

R103 

133-4100 

Resistor, Trimpot, 10K Ohms 

R105, R117 

100-5100 

Resistor, Film, 100K Ohms, 1/4 watt, 5% 

R106, R116 

100-2100 

Resistor, Film, 100 Ohms, 1/4 watt, 5% 

R107, R115 

100-3220 

Resistor, Film, 2.2K Ohms, 1/4 watt, 5% 

R108 

100-3100 

Resistor, Film, 1K Ohms, 1/4 watt, 5% 

R114 

100-4100 

Resistor, Film, 10K Ohms 1/4 watt, 5% 

 

Summary of Contents for MFJ-415B

Page 1: ...d Installation 2 Shorting Plugs 2 Adjustment and Calibration 2 Transceiver Recalibration of VFO 2 Module Calibration for CW Band 3 Module Adjustment for CW Offset 4 Module Adjustment for QSK Hold 4 In...

Page 2: ......

Page 3: ...to the transceiver s VFO circuit to shift frequency coverage into the CW portion of the band The specific components required to make the VFO shift are selected by the jumper plug on header J105 You...

Page 4: ...no sidetone remove it For MFJ 9440 place a shorting plug on center and rear pins of J105 For MFJ 9420 place a shorting plug on center and front pins of J105 Adjustment and Calibration Your MFJ 415B C...

Page 5: ...O dial are set to 14 000 MHz MFJ 9440 Signal source and VFO dial are set to 7 000 MHz If your MFJ radio lacks a CW band dial scale on its faceplate set the VFO dial to the low end of the phone band Th...

Page 6: ...personal preference by adjusting trimpot R102 To approximate the factory default position set the arrow on the trimpot to the 2 in the R102 silkscreen marking on the pc board Important VFO setting Not...

Page 7: ...e at least 40 dBc or 40 dB down from full CW output Technical Assistance If you have any problem with this unit first check the appropriate section of this manual If the manual does not reference your...

Page 8: ...MFJ 415B CW Adapter Instruction Manual 6 Schematic...

Page 9: ...5 Jack Stereo PCB 3 5 mm J104 612 0102 Header Pin Straight 375 1 2 Position J105 612 0103 Header Pin Straight 375 1 3 Position K101 408 1011 Relay Reed Type 12 V SPST L101 402 2710 Inductor Coilcraft...

Reviews: