Home-made "B" Battery
A CONSTRUCTOR has advised us of an improvement to the homemade B battery described by "Megohm." Instead of attempting to form his own plates, he has procured plates measuring 5$ x 5 which have been already formed. These were cut into strips. each half an inch, and suspended in the test tubes as was originally described. The positive of une has been connected to the negative of another by a pure-lead telephone wire covering. On the top of each test tube he has placed a thin covering of light oil.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19290823.2.68
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Radio Record, Volume III, Issue 6, 23 August 1929, Page 29
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93Home-made "B" Battery Radio Record, Volume III, Issue 6, 23 August 1929, Page 29
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