The M31 gallery of...
cool & collected:

Hoffman BP-709XS Solar-Powered coatpocket

top view: solar cells...


Circa 1962/'63, a nice little 9-transistor solar-powered / battery-powered radio. Measures about 5 x 3 x 1 3/4...


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2007 by Robert Davidson, transistors@abetterpage.com


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so bad it's good...
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