ELECRAFT KXAT1 Instrucciones de operaciones descargar pdf (Pagina 3)

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.

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.

If present, remove the KXB30 module. Remove the KXB30 wires from the KX1 main PCB and clear

the pads on the KX1 main PCB of all solder.

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ELECRAFT KXAT1 Instrucciones de operaciones Pagina 3