K1EL
Morse Code Practice Oscillator
CPO
CPO Datasheet – A.3
4/10/2020
Page
17
Index
Features .......................................................................................................................................................... 2
Description ...................................................................................................................................................... 2
Enclosure Label ............................................................................................................................................. 2
CPO Functional Block Diagram ...................................................................................................................... 3
Figure 1 – CPO Block Diagram ............................................................................................................... 3
CPO KIT Construction .................................................................................................................................... 3
CPO Parts List ................................................................................................................................................ 4
CPO Assembly Instructions ............................................................................................................................ 5
CPO Assembly Instructions ............................................................................................................................ 5
Figure 2 – Board as shipped from K1EL ................................................................................................. 5
Figure 3 – C5, C8, C15 lead straightening .............................................................................................. 6
Figure 4 – First stage assembly complete ............................................................................................... 6
Figure 5 – Second stage assembly complete ......................................................................................... 7
Figure 6 – Surface mount jack installation .............................................................................................. 8
Figure 7 – Third stage assembly complete ............................................................................................. 8
Figure 8 – LED Lead Preparation ........................................................................................................... 9
Figure 9 – The LED lines up vertically with the pushbuttons ................................................................... 9
Figure 10 – The LED should extend from the PCB as shown ................................................................. 9
Figure 11 – DON’T FORGET TO JUMPER S1 to S2 ............................................................................ 10
Figure 12 – U1 and U2 Pin 1 orientation ............................................................................................... 10
Final Assembly .............................................................................................................................................. 11
Figure 12 – Carefully align and attach top sticker ................................................................................. 11
Figure 13 – Attach PCB to enclosure base with five screws ................................................................. 11
CPO Kit Checkout ......................................................................................................................................... 12
Troubleshooting ............................................................................................................................................ 12
Finishing Touches ......................................................................................................................................... 12
Figure 14 – How to attach top cover ..................................................................................................... 13
Control Knob Positioning .............................................................................................................................. 13
Figure 15 – Volume and Pitch Settings ................................................................................................. 13
Using the CPO Kit ......................................................................................................................................... 13
Figure 16 – CPO Key/FSK Input Connections ...................................................................................... 13
Figure 17 – CPO External Speaker Connections .................................................................................. 14
CPO Schematics ........................................................................................................................................... 15
A Word or Two Regarding USB Phone Charging Batteries .......................................................................... 16
Support and Warranty Information ................................................................................................................ 16
Revision History ............................................................................................................................................ 16
Index ............................................................................................................................................................. 17
Appendix A - Kit Construction Hints .............................................................................................................. 18
Appendix B - A Note About Safety ................................................................................................................ 19
Appendix C - Soldering Basics ...................................................................................................................... 19