Elecraft KXB30 User Manual download pdf

Elecraft • www.elecraft.com • 831-662-8345

ELECRAFT KXB30 30-METER ADAPTER

Assembly and Operating Instructions

Introduction

The KXB30 adds 30-meter capability to the Elecraft KX1 transceiver. It also significantly improves

performance in the 49-meter SWL band segment (receive only) by re-resonating the KX1's receive band-

pass filter at about 6.2 MHz when the operator tunes below 6.7 MHz (with 40 meters selected). High-

performance PIN-diode switches are used to minimize insertion loss and ensure good 30-m sensitivity.

With only a dozen or so parts, the KXB30 is easy to build. The module is installed on the top side of the

KX1's main PC board. The KXB30's filters can be aligned from the bottom side of the board through the

access holes labeled 30A and 30B, so the top cover can be installed prior to alignment.

Specifications

30-m coverage Transmit/receive: 10100-10150 kHz; receive only: 8000-12500 kHz.

Added current drain Approx. 3 mA

Size 1.5" (L) x 0.75" (W) (3.8 x 1.9 cm)

1 2 3 4 5 6 7 8

Summary of Contents

Page 1 - KXB30 30-METER ADAPTER

Elecraft • www.elecraft.com • 831-662-8345ELECRAFT KXB30 30-METER ADAPTERAssembly and Operating InstructionsRevision A, Oct. 14, 20

Page 2 - Parts Placement Drawing

2Parts Inventoryi Caution: Diodes D1 and D2 can be damaged by static discharge. Before handlingthese parts, put on an anti-static wrist strap or touc

Page 3 - PC Board Assembly

3PC Board Assemblyi A fine-point, temperature-controlled soldering iron (700-800 degrees F) is required to assemblethis kit. A high-wattage iron or o

Page 4 - Pre-Installation Checks

4 Install R4 and R5 (1 k, brown-black-red). Solder and flush-trim as before.i L1, L2, and L3 may be labeled R1, R2, and R3 on your PC board. Install

Page 5 - Installation

5Figure 1Installation Strip off all of the insulation from 5.5 inches (14 cm) of the supplied hookup wire. Cut the bare wire into four 1" (2.5 cm

Page 6

6 The free ends of the wires will be routed to matching labeled holes on KX1 PC board. Due to spaceconstraints on the top, the holes are labeled on th

Page 7 - Alignment and Test

7 Remove the adhesive backing from the rubber bumpers and install them as shown in Figure 2a. If thebumpers don't sit flat on the board, make sur

Page 8 - Circuit Details

8 Switch to 30 meters and align the two trimmers on the KXB30. You can peak them while listening toWWV at 10 MHz, or using signals or noise in the ham

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Elecraft KXB30 User Manual

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