HB-1A three-band CW QRP transceiver Manual

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					 HB-1A      three-band CW QRP transceiver Manual

   HB-1A with a small size, light weight, can be built-in
batteries, particularly suitable for travel, picnics and other
outdoor activities.
   HB-A1 covered 20 meters, 30 meters, 40 meters amateur bands.
With the DDS circuit to generate VFO signal, it can also work
outside of the three amateur bands. It can cover between 5-16MHz
band short wave radio bands. Each CW and SSB IF filters have
four bandwidths to choose, you can receive a good SSB, AM and CW
signals. Also cross-contact can be used.
   HB-1A built-in 8 AA batteries, can provide about 2-3W of RF
power, with external 12V power about 4W output power. HB-1A
using low-power design, the receive current is approximately
   HB-1A at the same time the LCD display: frequency, operating
mode, supply voltage, S meter, receive fine-tuning (RIT) and
other information, It is very convenient to use.
   HB-1A have 20 frequency storage memory can be convenient to
change the operating frequency and band. Frequency step Can be
easily to change, amateur bands: 100Hz, 1KHz, 100KHz. Radio
frequency bands: 100Hz, 5KHz, 100KHz. Receive fine-tuning (RIT)
has the step two respectively 10Hz and 100Hz.

Size:              140*95*35mm (not including protrusion of
                   the knob, etc.)
Weight:            about 500g (not including batteries)
Supply voltage:    9-14VDC
Current drain
Receive:           about 55mA (No signal)
Transmit:          about 550-950mA (according to the different
                   supply voltage)
Frequency range
Receive:           5-16MHz continuous

Transmit:         7.0-7.3MHz, 10.1-10.15 MHz,14.0-14.35 MHz
VFO:              DDS circuit with 50MHz reference frequency
Display:          1602 LCD.
Output power:     12V supply 4W、13.8V supply 5W
Side tone:        about 700Hz
Automatic key:    adjustable speed Built-in.
Selectivity:      4 crystal filter, SSB bandwidth of about
                  2.2-1.6KHz four selectable bandwidth,
                  CW bandwidth of about 900-400Hz four
                  selectable bandwidth.
Audio Output:     8 ohm load about 0.1W(Need to take stereo plug)

Built-in battery
   Removed the two screws on the back can be installed or
replacement battery(8 AA size).

External power supply
    Any 9-14V DC voltage or battery can be connect to (12VDC).
It has a polarity protection circuit

   Any resonant antenna can be connect directly to the antenna
(ANT) with a BNC connector, for non-resonant antenna need to
insert an antenna tuner

   Stereo headset will be connected to the headphone port
(PHONE), impedance 8-32 ohm.

   The HB-1A has an automatic function that determines what type
of key is being used and is initiated at Power On time. you will
be heard (in CW) the sound of the letter “A” if the paddle is
connected or the letter “M” if the straight key is connected.

                    Connect to paddle dot
                    or straight key’s contactor

                    Connect to paddle dash
                    or straight key’s ground

                    Connect to paddle’s ground
                    or straight key’s ground

   3.5mm stereo plug

The operation of HB-1A
   When power on, you will be heard (in CW) the sound of the
letter “A” if the paddle is connected or the letter “M” if the
straight key is connected. (If not connected any key, will hear
the letter “A”).

V/M/SAV Button

   Click this button will be Alternating between Memory mode(MEM)
and VFO mode, the LCD screen will show the EME-** or VFO-**(**
The figures for 01-20).In Memory Mode the Tuning knob is used to
change memory locations. In VFO Mode the Tuning knob is used to
change the frequency.
   Press the V/M/SAV button for 2 seconds(the LCD screen will
display SAVE), the current frequency and current mode will be
stored in the Memory Location selected.

RIT/MOD button

   Click this button to enter or exit RIT function. A dash (-)
will be displayed to the right of the frequency display as shown

   When in the RIT mode, turning the tuning knob clockwise
raises the frequency (as indicated by the up arrow). turning the
tuning knob counter-clockwise will lower the frequency (as
indicated by the down arrow).
   To Change mode, press and hold the RIT/MOD for 2 seconds.
This will allow you to change the mode from CW to USB to LSB and
CW again. Press and hold the RIT/MOD for 2 seconds for each

ATT/IF button

    Click this button can ON or OFF the ATT(receiver attenuation).
The S in the LCD display will change to A indicating the ATT is

   Pressing the ATT/IF for 2 seconds will cause the receiver to
enter the IF band width change mode.
        While in the IF bandwidth change mode, Click this button
to change the bandwidth. when Completed, Pressing the ATT/IF
for 2 seconds again to exit.( If do not make any operation, a
several seconds after it will be automatic exit)

Change the Frequency Tuning Steps
   While in receiving mode, pressing the tuning knob lightly
will change the tuning step to either 100Hz or 1KHz(in the RIT
mode, will be 10Hz and 100Hz). As the change is made, the
position in the display that the step is being changed to will
momentarily display an underscore (_) for verification of the
   If you Pressing the tuning knob for 2 seconds, the tuning
step will be 100KHz.(This operation could not be used in the RIT

Frequency locking function

   Simultaneously press both V/M/SAV and the RIT/MOD for about 1
second. To lock or unlock the tuning knob, In lock mode the
symbol (#) will be displayed next to the frequency. In this mode,
Rotation the tuning knob can not change the frequency.

Automatic key function
Automatic call CQ
   Press the CQ/SET button lightly to send “CQ CQ CQ DE (your
call sign three times) PSE K”. If the CQ is to be cancelled
press CQ/SET button for 1 second at any time during the CQ.
Change speed
   Press CQ/SET button for approximately 2 seconds and the Morse
code letter “S” will be heard, then release the button. With in
5 seconds, push the paddle to the DOT side to increase the keyer
speed or to the DASH side to decrease the keyer speed. When
complete, press CQ/SET lightly to exit (the letter “E” will be
How to enter your call sign
   Press CQ/SET button and hold about two seconds ,you can hear
the Morse code letter “S”, continue to hold down the CQ/SET
button until you hear the letter “I”, at this time release
CQ/SET button, and then send your call sign with paddle as usual.
When done, a short click CQ/SET button to exit, you can hear
Morse code letter “E”, or wait for about several seconds, it
will automatically exit.
Turn off the automatic call CQ function
   If you do not want automatic call CQ function, By the
following operation you can cancel this feature.
   Press CQ/SET button and hold about two seconds ,you can hear
the Morse code letter “S”, continue to hold down the CQ/SET
button you hear the letter “I”, then continue to hold down the
CQ/SET button until you hear the letter “C”, at this time
release CQ/SET button, push the paddle to the DASH side to
choose automatic call CQ function “OFF”(can be heard Morse Code
OFF). If you want to restore this function, After re-entering,
push the paddle to the DOT side to choose automatic call CQ
function “ON”(can be heard Morse Code ON)


   When transmitting on the frequency of: 7.0-7.3MHz, 10.1-
10.15MHz or 14.0-14.35MHz, the HB-1A will display the
approximate power output.
   The letter “S” is replaced with the letter “P” followed with
a series of vertical bars. Each 3 bars represents approximately
1 watt of output power.

   When trying to transmit on the Frequency outside the amateur
frequencies, HB-1A will not transmitting, the display will show
TX ERROR flashing.

The DDS frequency calibration
Note: This operation will reset the 20 frequency memory to its
original value. And, you need a frequency meter to calibrate the
frequency of DDS. If no need, please do not do this.

   Turn-off power, Simultaneously press both V/M/SAV and the
RIT/MOD, turn-on power, holding down the two keys until you see
the LCD display like this, then release the keys.

   A few seconds after entering the DDS calibration state, the
LCD display will show below:

   Testing the frequency at IC1’s pin6 with a frequency meter,
Adjust the frequency with tuning-knob, Until the frequency of
reading is the same as the LCD display. Press the RIT/MOD button
to exit.

Circuit Details
   Please refer to the attached circuit diagram.

                                      BD4RG / 2009-8-8

                1                                                                2                                                           3                                                       4                                                               5                                                                      6                                                      7                                                             8

                                                                                 IC6                                                                                                                                                                                                                                                                                           +V
                                                                                 AD9834                                                                                                    KEY                                                                                                        0.1                                                          C49
                                                    R26         1                                20                                                                                                                                                                                                   C46                                                                      C50
                                                                          FSADJ       IOUTB                                                                                                                                                              R29                                                                                        L6             0.1         470uF
                                                    4.7K                                                                                                                                                                                                                                                                                            10uH
                                                                1                                19                                                                                                                                                      10
                                                                          REFOUT       IOUT
                                                                3                                18                                                                                                      Q6                                                                                                                                 Q9                                                                           C54 56P
                                                                          COMP        AGND
D                                   5V                                                                                                                                                                                                                                                                                                      1162                                                                                                                                     D
                                                                                                                                                                                                         J309                                 C45        R30                                   T1                                                                                                                                                                     ANT
                                                                4                                17                                                     L4             L5                                                                                                                                                                                                 C51                      0.5uH
                                                                          AVDD          VIN                                                                                                                                                   0.1        220                                                                                                D8                                L8                               L7
                            C59             C39                 5                                16                                                  2.2uH             4.7uH                                                                                                     Q8                                                                         43V                                                              0.6uH
                            10uF            0.1                           DVDD        S-OUT                                          R27           C41               C42             C43                                                                                                                                                                                                 C52                C53          C56               C57           C55
                                                    C40                                                                                                                                                                                                                          4401                                                                                     0.1
                                                                6                                15           RC0                    220           39P               100P            22P                                                                                                                                              R35                                                150P               470P         1500P             1000P         220P
                                                                          CAP         FSYNC                                                                                                                                            R31                                                                                            33
                                                    0.1         7                                14           RC2                                                                                C38                                   22K                                                                                 RDI                                                                                         K1a                K1b                        C58
                                                                          DGND         SCLK                                                                                                      0.01                                                                           R33                                                                                                                                                                                  0.1
                                                                                                                                                                                                                               C44                        Q7                                                               100
                                   +5V                          8                                13           RA4                                                                                                                                         3904                  10
                                                                          MCLK       SDATA                                                                                                                                                                                                                                                                                           C1                                                                                         D4
               1                    3                           9                                12                                                                                                                            0.01                                                                                                                                                  1000P                                                                           D5
                                                                          FSEL        SLEEP                                                                                                                              R28                                                                                                TX Part
               2                    4                       10                                   11                                                                                                                      1K                R32                 C47              R34
                                                                          FSEL        RESET                                                                                                                                                  10                                 33                                                                                                                                                                  D6
                      X7                                                                                                                                                                                                                                  1000P
                                                                            DDS                                                                                                                                                                                                                                                                                                2N7000                                                                                C48
                                                                                                                                                                  MAX522                                                                                                                                                                                                                 R45                ATT                                  R24                 0.1
                                                                                                       +V                             RC7               1                       8    RA4                                                                                                                                                                                                                                                         22K
                                                                                                                                                                                                                                                                 C5                                                                                                                      10
                                                                                                                                                                                            6V                                                                                                                                                                                                                                POW(RA1)
                                                    IC5                                                                               RC2               2                       7                                                                                0.01
                                                    93C46B                      5V                                                                                                                                                         AGC                                                                                                              Q1
                      RC3               1                             8                                     R23                                         3                       6 OUTA                                                                                                                                                                      3904                                                                                 R25
                                                                                                            1K                        5V                                                         C34                                                                                                                                                                 R11                                                                         2.2K
                                                                                                                                                                                                                          6V-2                                                   L9                                                                                                      MUTE
                      RC2               2                             7                                                                                 4                       5 OUTB           0.1                                                                             100uH              T3                      T2                                       1K
                      RA4               3                             6                                       C33                                                                                                                      3904                                             C61                    C37
C                                                                                        C35                  10uF                                                                                                                                                                                                                                                                                                                                                                   C
                                        4                             5                  0.01

                                                                                                                                                                                                                                                                                        10p           C2 15p                     C3
                                                                                                                                           C30                                 C27                         R1                                                                                         0.01                       0.01
                                                         +4.5V                                       TEST                      C29         0.01                                0.1                         2.4K
                                                  R22                                                             UP           0.01                                                                                 X1                                                                                                                                      OUTA
                                                                                                                                                            R38                      OUTB                             D12                                                        IC1                     D10                     D11
                                                  22K                                                                                                                                                    R39
                                                                                                                  DN                                                                                                                                                             NE602                         R37                      R36                 C28
                       5V                                                                                                                    DAIL                                                                                                                                                              51K                      51K                 0.01
                                                                           IC4                                                                                                       R42                            X2
                                                                           PIC16F73                                     PUSH                                                         47K                              D13

                                                             1        MCLR/VPP    RB7           28       S2                                  PUSH
                           R18                                                                                                                                                                                                                                                                                      C4
                           220                                                                                                                                                                           47K
                                                             2        RA0                RB6    27       TX                                                                            C7                           X3                                                                                              0.01
                                                                                                                                              S4                                       0.01                           D14                                                        C6           R44                                                                                    78L05
                                                             3        RA1                RB5    26       S5             S4                                                                               R41                                                                     0.01         33                                                   5V                                                       +V
           16                                                                                                                                                                                                                                                                                                                                                                                                                      D1
                                                                                                                                                                                                         47K                                              OSC                                        6V                                                                                                                                                                    J2
           15                                                                                                                                                                                                       X4                                                                                                                                      C31                                                                                                  1
                                 RA3                         4        RA2                RB4    25       S4                                  S2
           14                                                                                                                                                                                                                                                                                                                                               10uF                                                                   5818                          2
                                 RA2                                                                                    S2
           13                                                                                                                                                                                                                                             Mixers
                                 RA1                         5        RA3                RB3    24       PUSH                                                                                                                         6V                                                                                                                                                                                                                        BAT
                                 RA0                                                                                                         S5                                                                                                                                                                                                                                      78L06                       S1                D2
                                                             6        RA4                RB2    23       UP             S5                                                                                                                                                                                                                                    6V                                                                                                           J1
           10                                                                                                                                                                                                                                 R2
            9                                                                                                                                                                                                     15uH         IC2                                                                                                                                        C32                                                      5818
                                                         S/M 7        RA5                RB1    22       DN                                                                                                                                   33
            8                                                                                                                                                                                                                  NE602                                                                                                                                      10uF                             R20
                                                                                                                                                                                                                                                               C17 0.01                                                                                                                                                                                   POWER
            7                                                                                                                                                                                                                                                                                                                                                                                              10K
                            RC1                              8        VSS            RB0/INT    21    TEST                                                                                                          1                               8
                                                                                                               5V                                                                                                                                                                C16
            5                                                                                                                                                                                            C18
B                           RC2                              9        OSC1/CLKIN VDD            20                                                12V                                  L2                           2                               7                                                                                                                                                                                                                                B
            4                                                                                                                                                                          47uH                                                                    C15                                                                                                                                                     R19
                                                    X6                                                            C36                                                                                                                                                                                                                       C25                                                                                     V/T(RA0)
            3                                                                                                                                                                                            68P
                                                             10       OSC2/CLKOUTVSS            19                                                                                                                  3                               6                    L3      220P X5            CE                                                                                                      10K        2.4K
            2                    +5V                                                                                         C65                                                                                                                               100P
                                                                                                              0.01                                K1                                                                                                                                                                                                                            6V
            1                                                                                                                470uF                          D7
                                                             11       RC0                RC7    18                                                                                                                  4                               5                   47uH                                                                10uF
                                                  4MHz                                                                                                                                                                                                                                              10-50P                                                         C22
         LCD1602                                                                                                                                                                                                                                                      C20
                           R17                               12       RC1                RC6    17 ATT                                                                                              C13                                                                                                                     1                           8                            C26                   R21
                           1K                                                                                                                                                                       0.1             Demodulation                                                                                                                                   0.01              470uF                 4.7K
                                                             13       RC2            RC5/SDO    16                                                                                                                                                 C21                0.1                                                   2           IC3             7                                      R43
                                                                                                                                                   Q2                                                                                                                                                                                   LM386                       R7                         2.2M
                                                             14       RC3                RC4    15                      R16                        3904                                                                                                                                                                     3                           6           4.7K
                                                                                                                        4.7K                                                                                                                       0.1                                                                                                                     C24
                                                                                                                                                                                                                                                                                                                            4                           5
                                                                            MCU                                                                                                      AGC            R3
                                                                 5V                                                                                                                                                                    MUTE               R4                            2N7000                                                                C23                                                             AF GAIN
                                                                                                                                                                                                    2.2K                                                                                                                                                                  100uF
                                                                                                                                                                                                                                                          51K                                                                                                  0.1
                                                                                                                                                                                                                                                                                 C19                           Audio amplification                                                                           Q11
                                                  C10                                                                   MUTE                                                                                                                                                     0.1                                                                         R8                                            2N7000             1K
                                                  0.01                               IC7                                                                                                                                                           Q10                                                                                                                                                                                              PHONE
                                                          R12                        12F629                                                                                                                                                        3904
                      C11                                 22K         1                          8                           KEY                                                                                                                                                                               D3
                    1000P                                                                                                                                                                                                                                                                                                        R5
                                            R13 1K                    2                          7                                                                                                                                                                                                                                                                                                 Q12           C60
                                                                                                                                                                                                                                                                                                                                 4.7K                                     R9
                                                                                                                             TX                                                                                                                                                                                                                    MUTE                                            3904          0.1                      TONE
    J4                                                                                                                                                                                                                                                                                 R10
                                                                      3                          6                                                                                                                                                                                                        C14                                                             4.7K
                                                                                                                                      C9                                                                                                                                               100K               10uF
                                   C12   R14                          4                          5          R15                       0.1          TONE                                                                                        R6
         KEY                             1K                                                                                                                                                                                                    1K
                                   1000P                                                                    10K                                                                                                                                                  S/M
A                                                                                                                              C8                                                                                                                                                                                                                                                                                                                                                    A
                                                             S3                                                                0.01
                                                                                                                                                                                                                                                                                                                                                                                                          HB-1A 3 Band CW QRP Transceiver

                                                                                                                                                                                                                                                                                                                                                                                Size           Number                                                       Revision
                                                                                                                                                                                                                                                                                                                                                                                                                       HB-1A3                                      2009-08-05
                                                                                                                                                                                                                                                                                                                                                                                Date:         8-Aug-2009                                    Sheet of
                                                                                                                                                                                                                                                                                                                                                                                File:         D:\HAM\HB-1A\HB-1A3B.SCH                      Drawn By: BD4RG
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