Palm Code Cube CC

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Palm Code Cube

The Code Cube (CC) was designed as an addition to the Mini Paddle. The combination of these two units creates the World's smallest full featured electronic memory keyer and paddle. The Code Cube plugs into any Palm Mini Paddle - no external wiring required, just plug it in.

Among its other features, it offers two text memories with 80 characters each and a separate call sign memory. Various CQ and beacon modes, selectable Iambic Modes A/B, additional dot/dash memories and other features make the Code Cube a keyer which leaves almost nothing left to be desired.

The CC is powered from a 3V lithium battery. The readily available, long lasting CR2032 cell gives several years of operation as the idle current is just 0.01uA. 

The Code Cube keying speed is adjustable from 5 to 50 WPM via a handy thumbwheel. The preferred speed range of the speed potentiometer can be defined and programmed by the user.

Palm Radio have included a sidetone oscillator which drives the built-in piezo buzzer for CW practice and for programming. It also provides a side-tone if your radio doesn't have one. The tone frequency can be adjusted from 500 Hz to about 7KHz. If you prefer to practice Morse Code silently, the keying output can be converted to a headphone output for 3,5mm plugs. To do this, simply change the position of a jumper and set the CC to its practice mode.

The Code Cube comes with a Travel Case and a connecting cable. The cable has a stereo phone plug on one end, depending on your transceiver input jack we supply also one 3.5mm (1/8 inch) and one 6.3mm (1/4 inch) stereo plug that you can fit.

Download the Code Cube Manual here.


  • pot or paddle speed control - 5 to 50 WPM speed range
  • speed readout via mem+dit simulpress
  • 2 memories, non-volatile (contents retained when power off)
  • memory embedded pause, callsign memory insertion
  • weight adjustable via menu item
  • tone frequency adjustable via menu item
  • beacon mode including timed beacon delay
  • separate command sidetone frequency (lower - non adjustable)
  • bug mode (dit paddle normal, dah paddle functions as straight key)
  • tune function via menu
  • 5 didah tune mode
  • or single paddle 10 dahs/dits tune mode
  • Ultimatic keying mode
  • selectable Iambic keying modes A or B
  • two selectable varieties of mode b: Accu Keyer / CMOS Super keyer
  • dit / dah memories can be turned off
  • selectable live "on the air" recording of memories
  • paddles can be reversed via menu item
  • autospace on/off selectable
  • stuck paddle protection (puts keyer to sleep after 128 consecutive dits/dahs)
  • tune mode timeout after 14 seconds
  • low power, about 7 ua w/regulator while keyer is asleep, 3 ma or less active @ 5V
  • exit from menu system instantly with a PAR (press and release) of mem + dit + dah
  • Single lever paddle compatible, "both" paddle features are accessable with an in-turn press of dit then dah or dah then dit
  • power up bypass straight key mode
  • selectable two or one second press and hold delay time
  • embedded "pause and go", keyer will pause for operator sent code, then automatically resume playing the message after a word space
  • "backspace" while recording, if a mistake is sent, the operator can back up one character in memory with a mem+dit PAR (press and release)


Frequently Asked Questions

Q: How can I do a Factory Reset on my Code Cube?

 A: Take the cell out, short circuit Code Cube +/- contacts, put in the battery with pressed MEM button again, you will hear »fb«. Your Code Cube has now been reset

Q: How do I set the minimum and maximum code speed?

A: If you have a problem with setting the min and max speed, please try a Factory Reset before calibrating again.


  • Set speed wheel to the left (minimal speed)
  • Press MEM + DIT
  • You hear SH
  • Press MEM again
  • You hear SL
  • Press MEM again
  • You hear W
  • Press MEM again
  • You hear C
  • Press DIT paddle once
  • After some characters the Code Cube will revert to normal mode again (16WPM min, 32WPM max)

Setting the minimum speed:

  • Press MEM + DIT
  • You hear SH
  • Press MEM again
  • You hear SL
  • Now, press DAH paddle once, you hear the current minimal setting (should be 16WPM after reset, and calibration)
  • With each DAH you subtract 1WPM (example 16WPM - 11WPM = 5 WPM)
  • Press MEM a few times to leave the MENU

Setting the maximum speed:

  • Press MEM + DIT
  • You hear SH
  • Now, press DAH paddle once, you hear the current maximal setting (should be 32WPM after reset, and calibration)
  • With each DAH you add 1WPM (example 32WPM + 8WPM = 40WPM)
  • Press MEM a few times to leave the MENU

Q: I can hear the sidetone but the Code Cube is not keying my radio. What's wrong?

A: Probably the practice mode is activated, what means that the keying transistor of the CC is disabled. This can be changed through the appropriate menu setting. Please go to Menu 4, »PR« and hit the »DAH« paddle.  

Q: Can the sidetone be disabled?

A: Of course you can switch off the side tone (Menu 2a, item »ST«) as described in the manual 
The procedure:

  • MEM + DAH -> TU -> pressing the DAH paddle brings you to menu 2a

- In menu 2a:

  • MEM -> TO
  • MEM -> SP
  • MEM -> H
  • MEM -> SF
  • MEM -> ST -> DIT turn off the sidetone.
  • MEM -> TO

The sidetone is now turned off.

Q: I have an old tube (valve) transceiver, I would like to use with the Code Cube. What should I do?

 A: The older type transceivers are often keyed with negative voltage. You should connect a grid block keying adapter between Code Cube and the transceiver, e.g. like this one:


3 Reviews Hide Reviews Show Reviews

  • 5

    Posted by TERRY on 19th Jun 2018

    This is a good for practicing the CW and easy to setup.

  • 4
    Palm Code Cube and Mini Paddle are the perfect pair

    Posted by Neil VA5SCA on 18th Jun 2016

    I'm (still) learning Morse Code, and have only used the Code Cube as a practice keyer so far, but it's perfect for that. It's politely quiet and terrifically portable. I'm sure it will also be great in the field, when I get to that point.

    The manual is a bit cryptic (size limitations, I'm sure), and the written menus need to be read VERY carefully at first; but there's a surprising amount of computer power in that small package, and you're controlling it with a button and two paddles. It's definitely an RTFM (Read The Fine print, Mate!) situation.

    My only regret is that I couldn't afford to buy both Mini Paddle and Code Cube at the same time!

  • 5
    Top Class Kit

    Posted by Wallace Moodie on 12th Aug 2014

    Plug it into the Palm Mini Paddle, turn the wheel to set your speed, and away you go.
    Build quality is typical Palm excellence, and the Code Cube and the Mini Paddle look perfect together.
    Not had the CC long enough to evaluate battery life, but the quiesecent current is almost zero and so I suspect my spare battery will not be called into action for some time to come.
    Very pleased with my purchase, and also SotaBeams exemplary service.