YouKits HB-1B MK4 User Manual

HB-1B MK4 2018
4 band CW QRP transceiver Manual
Introduction:
HB-1B MK4 2018 is the upgrade version of our HB-1B QRP
transceiver. It is a small in size, light weight, lithium battery pack ,
particularly suitable for travel, picnics and other outdoor activities.
HB-1B MK3 covered 40m,30m,20m,（17m） and 15m amateur
bands.With the DDS circuit to generate VFO signal, it can also work
outside of the 5 amateur bands. It can cover between 5.9-22MHz
band short wave radio bands. Additional IF bandwidth switching
adjustable continued, you can receive a good SSB, AM and CW
signals.

YouKits HB-1B MK4 Specifications

General

Brand	YouKits
Model	HB-1B MK4
Category	Transceiver
Language	English

Summary

Introduction to HB-1B MK4

Device Specifications and Connections

LCD Display and Memory Functions

Details the HB-1B MK4's LCD display features, including frequency, mode, supply voltage, S meter, and RIT, plus 30 memory storage.

Specifications

Provides technical details: size, weight, voltage, current drain, frequency ranges for receive/transmit, VFO, display type, output power, and selectivity.

Connection Details

Explains battery power supply setup, external power connection, antenna connection, and headphone connection for the transceiver.

Keypad and Operation Guide

Key/Paddle Operation

Describes the automatic function to detect key type (paddle/straight key) and the sound indicator at power on.

V/M/SAV Button Functionality

Explains switching between Memory (MEM) and VFO modes and saving current frequency/mode to memory locations.

RIT/MOD Button Functionality

Details entering/exiting RIT function, frequency adjustment with the tuning knob, and changing operating modes (CW/USB/LSB).

XIT/DEL Button and Tuning Steps

Covers entering/exiting XIT function, QSK setup, and changing frequency tuning steps for different band types.

IF Filter and ATT Switch

Describes how to adjust IF filter bandwidth using the IF FILT button and the function of the ATT switch for signal attenuation.

Advanced Functions and Maintenance

Transmitting Procedures

Explains how to transmit in specified bands, interpreting the display (TX, S meter, SWR), and handling TX errors outside ham bands.

Automatic Key Functions

Details automatic CQ calling, changing keyer speed using the paddle, and entering the call sign for operation.

Antenna Tuning and Reset

Covers the antenna tuning function using paddle and CQ/SET button, and the reset procedure to restore factory settings.

DDS Calibration and Adjustments

Guides on entering DDS calibration state, testing and adjusting frequency, and adjusting VR/VC components for display and audio.