Tips and Jottings
JF you are assembling your own loud speaker, do not hurry over the joints or attempt to fix the cone in position before it is thoroughly dry, as many a rattle or buzz in the finished speaker has arisen from this cause. O. not forget when assembling a loud speaker unit that the driving rod should be mounted-to come exactly oppesite the tip of the cone itself. . AMONG the advantages of a counter- _ poise earth are the fact that it sharpens tuning, and is often effective in reducing humming interference. . ‘HERE are two types of oscillation, audible and inaudible, so do not suppose that because you cannot hear a howl the set cannot possibly be oscillating, [fF your reception suddenly varies or becomes distorted without your cwn set having been touched, it is indicative of "wipe-out" by a neighbouring circuit.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19301219.2.64
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Radio Record, Volume IV, Issue 23, 19 December 1930, Page 17
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143Tips and Jottings Radio Record, Volume IV, Issue 23, 19 December 1930, Page 17
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