A few nice Ham Radio images I found:
Concrete 151
Image by loonyhiker
When we put up an antenna tower for our ham radios, we had to dig a big hole and fill it in with concrete. Then we wrote our call signs in the concrete too. 5/30/12
Assignment: Make a photograph with a concrete surface in it today., post it then Tag it with #TP204
IMG_1207
Image by uplinkpdx
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