K20 Keyboard Keyer
KE4QDM - David M. Peterson

Coax

Are you interested in making your life a little easier. The K20 is nice little project that I found at www.K1EL.com. You may think that using a keyboard to sent morse code is unfair, the keyboard and program in the controller are doing all the work! Well, I can imagine the old timers saying the same thing about the Bug or Iambic Keyers. If we stand by the doctrine of accuracy over speed then the keyboard keyer is the perfect response. If you've ever heard me on the air you'd know what I mean. One more point to make before I get to the project, I still enjoy listening and copying by ear, and I'll never give up my Bencher Straight Key.

I've ordered the parts from two sources. The first is K1EL and the second is Mouser Electronics. K1EL sells the three chips which are the brain of the K20 (he even has a circuit board and kit, but they are currently out of prodcution.) From Mouser I ordered everything else, except the circuit board.

Coax

Here is a List of Mouser Parts Ordered
#Mouser Part #Manufacture Part # and DescriptionQu$Each$Total
1.606-CMP100CMP100 Chicago Miniature LED Hardware T-1 LED MTG CLIP5$0.160$0.800
2.163-4304163-4304 DGS DC Power Jacks PANEL MOUNT 2.1mm1$1.610$1.610
3.1710-21311710-2131 DGS DC Power Plugs DC POWER 2.1mm1$0.650$0.650
4.161-3402161-3402 DGS Phone Jacks PHONE 3.5mm STEREO4$0.430$1.720
5.610-PN2222APN2222A Central Transistors TO-92 NPN GEN PUR SW1$0.180$0.180
6.161-2206161-2206 DGS DIN Jacks MINI DIN PCB 6 PIN1$0.880$0.880
7.140-NPAL100V47140-NPAL100V47 Xicon Non-Polar Axial Electrolytic Capacitors 100V 47uF 10%1$2.790$2.790
8.575-1133081 10-13-308-41-001 Mill-Max Low Profile IC Sockets 8P GLD PIN GLD CONT3$0.350$1.050
9.140-50P2-102K140-50P2-102K Xicon Ceramic Disc Capacitors 50V,Y5P,1000PFD,10%1$0.080$0.080
>10.140-50Q5-473Z140-50Q5-473Z Xicon Ceramic Disc Capacitors 50V,Z5U,47000PF,Z2$0.130$0.260
11.140-50Q5-103Z140-50Q5-103Z Xicon Ceramic Disc Capacitors 50V,Z5U,10000PF,Z3$0.075 $0.225
12.80-CK14BR104KC192K104K1R5CA Kemet Conformally Coated Axial Ceramic Capacitors 100V .1uF 10%3$0.620$1.860
13.30BJ250-10030BJ250-100 Xicon 1/4W 5% Carbon Composition Resistors 1/4W BR,BK,BR,GD1$0.220$0.220
14.30BJ250-330K30BJ250-330K Xicon 1/4W 5% Carbon Composition Resistors 1/4W OR,OR,YW,GD1$0.220$0.220
15.30BJ250-4.7K30BJ250-4.7K Xicon 1/4W 5% Carbon Composition Resistors 1/4W YW,PR,RD,GD3$0.220$0.660
16.30BJ250-33K30BJ250-33K Xicon 1/4W 5% Carbon Composition Resistors 1/4W OR,OR,OR,GD1$0.220$0.220
17.30BJ250-10K30BJ250-10K Xicon 1/4W 5% Carbon Composition Resistors 1/4W BR,BK,OR,GD2$0.220$0.440
18.625-2N70002N7000 General Semi MOSFET Transistors TO-92 N-CH 60V 0.3A2$0.230$0.460
19.512-LM7805CTLM7805CT Fairchild Regulators 1A Pos Vol Reg1$0.450$0.450