Elecraft KXB3080 - Manual (Page 3)

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MISC Toroid wire, green #26 2 ft. E760004
MISC Toroid wire, red, #26 4 ft. E760002
MISC Toroid wire, red, #28 4 ft. E760003
MISC Rubber bumper, .04" thick x 0.3" square 2 E980017
Note 1 : Duplicate reference designators are for parts on different PCBs. The parts are clearly identified in the text.
Note 2: The PCBs may have rough places along the edges. This is a normal result of the manufacturing process and will not
interfere with installation.
For reference, the table below lists the pre-mounted surface-mounted devices.
Ref. Description Qty Part No.
C3, C6, C7, C8, C10 Capacitor, 0.1 µF 5 E530222
C9 Capacitor, 10 uF,10V, 20% 1 E530223
C2, C5 Capacitor, 300 pF 5% NPO 2 E530221
D1, D2 PIN diode, dual, common cathode 2 E560026
D3 Small Signal Diode 1 E560027
L1, L2, L3, L4, L5 RF choke, 47 µH 5 E690063
Q1 Transistor, PNP, 2N3906 1 E580030
R1, R2, R6, R7 Resistor, 470 ohms 1/10 W, 5% 4 E500187
R3, R4, R5 Resistor, 240 ohms, 1/10 W, 5% 3 E500188
R8 Resistor, 15 k-ohm, 1/10W, 5% 1 E500189
Assembly and Installation
There are four major steps in the procedure. Follow them carefully and in the order given.
1. Modify the KXB1 PCB to install a new receiver input circuit.
2. Assemble and install the KXB3080 option PCB. Install new firmware if needed.
3. Assemble and install Low-Pass Filter LPF1.
4. Reassemble, test and align the KX1 with the KXB3080 module.
Part I: Modify the KX1 PCB
Disassemble your KX1 and remove the main PCB from the enclosure. If you have the KXAT1
antenna tuner option, remove it and place it in a safe place where it will be free from ESD damage. Use an
ESD-safe bag if you have one available.
i
Very important:
1. Be careful to avoid accidentally touching components with your soldering iron. Relays
and potentiometer shafts are especially vulnerable to heat damage.
2. Clear pads of all solder before attempting to install new parts.
3. As you install new components, clip all leads flush with the PCB on the reverse side.
Bend C15 (near the crystals on the KX1 board) up to gain access to solder pad G under it.