The Base
Using a piece of wood for base 5" x 5" x 0.75".
Then, poor me, with out a CNC, i painstakingly chiseled out a hole at the bottom 3" x 2.5" X 0.5" deep. This will be used to fill with molten lead, so that to give extra weight to the base and not move when keying.
The paddle mounting
Two small wooden blocks. Oner for mounting the paddle and the other for contact.
Smaller block is 1.5" x 1" x 1.5"
Lager one is 1.5" x 1.5" x 1.5"
The smaller block and contact plates. Hole drilled through all for ground contact.
The Lead
You will need lots of these. I get mine from car's dead lead acid battery. Then washed.
A tin container is used to melt the lead. You'll need about half full of molten lead. Once the lead melts, there will be more sand like and other stuff floating on the molten lead. This you need to get rid of after you pour the molten lead.
The molten lead poured into the bottom side of the base. Let it cool naturally. Do not pour water to cool. Takes about 20 minutes.
The Paddle
Made from PCB and painted. Hole in the center is for ground contact. Those on the side for mounting on the holder.
The IAMBIC keyer
Connect screws with bolts on both side of the paddle for ground contact. Adjust distance and tighten. The left side is dit and right is dah.
Side view of the wiring. Notice the blue wire. That connect the conatct point to the ground.
Red is dit and white is dah.
The completed IAMBIC keyer.
I use the IK0WRB module for this iambic key for morse tones.
Download the PDF file for containing:
PCB foil, TopSilk in PDF format and HEX file
Now to think of a better design. Any better ideas out there?
73's.
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