Shaped CPO kit
8/3/2009 - the Shaped CPO kit has been replaced with the Shaped CPO II kit
The Shaped CPO kit is a Code Practice Oscillator with a shaped or ramped
near sine-waveform which makes listening to code more fun than the typical
square wave, 555 based code practice oscillator. It features:
![[rev 2 shaped CPO circuit board picture -
click for larger version]](cporev2s.jpg)
on-board key and stereo output 3.5 mm jacks
setup for easy installation in a candy tin
available as a board only kit
twin-t oscillator for near sine wave output
variable frequency via on-board trimmer pot
on-board LM386 amplifier included
Printed manuals available for an additional charge or save money by
downloading (Right click/save target as) and printing the Shaped CPO kit
manual ,
schematic diagram
and hookup diagram
all in Adobe Acrobat (.pdf) format.
Here is a
troubleshooting text file containing DC and AC measurements for the Shaped CPO board.
Please note that the circuit board has been changed
slightly from the documentation, please click on
the circuit board picture above for a larger view of
the latest board. R1 and C4 have been moved, R1
(4.7k, yellow, violet, red, gold) is visible above
the jack J1 at the lower right.
C4 is the dark red cap to the right and slightly
above R1. Optional .1 uF and 10 ohm decoupling components
are visible to the left of the jack J1.
For larger quantity purchases, to combine with other items, for DX purchase price
or for any other questions, please send an email to me, Chuck Olson, WB9KZY at:
with your question or the items you want and we'll email you a Paypal invoice.
Page accesses: 
![[rev 2 shaped CPO circuit board picture -
click for larger version]](cporev2.jpg)