Click on the picture for a closer view. The conversation on 3.840 about paddles, etc, prompted this picture. Notice the solid state interface (the bare metal box on top of the 830) between the keyer and the 830. (My keyer doesn't like the minus 90 volts on the key line..) The keyer is a PK3 from Chuck Olsen, I built it in an altoids tin. The paddle is built using contacts from an old relay and other stuff.
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