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James A. Van Allen journal, December 1954-October 1955
Page 167
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Size 1 3/8 inches diameter x 3/16 inch thick (3.5 cm x 0.48 cm) Volume ~ 4.6 cm cubed [O exponent 2? or?] weight ~ 10 gm. [below here circled in red pencil] That is (1 watt / kg ) or ( 1/2 watt per lb ) [above here circled in red pencil] Active area (~ 5 cm squared) (estimated from photograph) Therefore, 20 watts per square meter of active area. Would probably also need batteries to stabilize voltage ! ----------------------------------------------------- ( B.T.L. claims (50 watts per m squared) - under optimum conditions. ) ----------------------------------------------
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Size 1 3/8 inches diameter x 3/16 inch thick (3.5 cm x 0.48 cm) Volume ~ 4.6 cm cubed [O exponent 2? or?] weight ~ 10 gm. [below here circled in red pencil] That is (1 watt / kg ) or ( 1/2 watt per lb ) [above here circled in red pencil] Active area (~ 5 cm squared) (estimated from photograph) Therefore, 20 watts per square meter of active area. Would probably also need batteries to stabilize voltage ! ----------------------------------------------------- ( B.T.L. claims (50 watts per m squared) - under optimum conditions. ) ----------------------------------------------
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