Rejuvenating Valves
"JK AUSPANKA" (Taradale) wants ~~ to know this procedure. Connect the filament legs of valve across the terminals of a 224-volt battery for 45 seconds, but no longer. Then disconnect all "B" and "C" battery leads from set, insert valves, and turn on filament switch, and leavé for six hours. Soft (detector) valves cannot
be rejuvenated.-
W. D.
Campbell
(Wai-
pawa).
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https://paperspast.natlib.govt.nz/periodicals/RADREC19290913.2.80
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Radio Record, Volume III, Issue 9, 13 September 1929, Page 31
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62Rejuvenating Valves Radio Record, Volume III, Issue 9, 13 September 1929, Page 31
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