Testing R.C. Units
R=ESISTERS and condensers should ‘be tested periodically with a pair of ’phones and a 45-volt battery. A compuratively strong click should be heard in the ’phones when connecting the anode resistance in series with the battery and ’phones. A much smaller click should be heard for the grid leak and, after the first click, in the :case of. the condenser, no more noises should be heard. If any of these components prove faulty they should be replaced, especially the coupling condenser, which, if leaking, will give a positive potential on the grid of the following valve. This not only gives distorted signals but in time ruin the valve, especially if it happens to be followed by either a speaker or. transformer, This is the first and most likely fault that a service man looks for when called in to overhaul the set.
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https://paperspast.natlib.govt.nz/periodicals/RADREC19290426.2.62
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Radio Record, Volume II, Issue 41, 26 April 1929, Page 31
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145Testing R.C. Units Radio Record, Volume II, Issue 41, 26 April 1929, Page 31
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