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Default settings
Automatic Key selection
Side Tone Pitch approx 700Hz
Tutor Speed:-17 WPM
Vari-Tone for advanced Tutor modes ON
Iambic B Mode active
This is the new version 4 of the uCPO with improvements over the MK3.
Whats New with the Mk4?
The difference between the two versions is subtle but did require a new PCB to be designed.
Up to now the uCPO needed a Morse key of some kind plugged in in order to use the Morse Tutor
side, well after a number of requests the uCPO now has a small push button that allows the user to
enter and control the tutor side without the key.
The second change is that some users asked if the low level AUX output level could be given a little
boost. The MK4 has approx an extra 6dB boost on this output.
The third change, the tutor always started in 'Letters' mode, now the tutor stores the operating
mode in a EEPROM and will remember the last used mode when next turned on.
Finally a minor change was to change the on board pitch control from what was a 25 turn control to
a standard single turn board mounted trimmer, this makes more sense as the pitch range is only in
the order of a few hundred hertz's (400 to 1000Hz) so they was no real need for a 25 turn trimmer to
start with. This makes tone adjustment easy!
SET-UP GUIDE
How to setup the uCPO options
The instructions below sound complicated but once you have run through them a couple of times
you will find you can make the changes in just a few seconds with ease.
1) Turn OFF the uCPO.
2) Press the key down or if a paddle squeeze both paddles and HOLD.( you can use the push
button on the front too)
3) Turn on the uCPO, (Still holding the key Or the button!)
After a short delay you will hear the letter 'A' in Morse, adjust the speed control to set the
tutor WPM rate.
I suggest setting the control at the 12o'Clock position which will be about 17 wpm character
speed. Once you're happy with the speed release the key.
uCPOv4 universal Code Practice Oscillator Full Kit V1.2
www.kanga-products.co.uk
Page 2
29/08/23
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