ADJUSTING A CRYSTAL.
Those who wish to adjust their crystals before the broadcasting begins (not having a buzzer at hand) will find the following a very simple way of doing so: —Connect one tag of the phones to the phone terminals, and, after wetting the other tag, rub it against the other terminal, at the same time adjusting the crystal detector until the loudest crackles are heard.
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https://paperspast.natlib.govt.nz/newspapers/EG19280928.2.32.4
Bibliographic details
Ellesmere Guardian, Volume XLVI, Issue 3258, 28 September 1928, Page 6
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67ADJUSTING A CRYSTAL. Ellesmere Guardian, Volume XLVI, Issue 3258, 28 September 1928, Page 6
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