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Old 4th Nov 2018, 1:34 am   #5
Join Date: Oct 2010
Location: Tintinara, South Australia, Australia
Posts: 1,324
Default Re: Early radio articles/stuff

I have a vague recollection of seeing something similar to the visual Morse code aid when I was doing the study for my license in 1969.
Terry VK5TM
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