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Radio Record, Volume I, Issue 18, 18 November 1927, Page 12

me eee re ee mee ret When a power valve is inserted in the last stage it behoves the owner tu increase his plate supply to this stage and balance up correctly with wrid bias, Ofteu this grid bias reaches us much as 42 volts, which, when conipared to the usual 44 to 9 volts, is really astounding, But it is so, and it its necessary to apply the correct voltage--ta fecd the yalve in other words. Read what the inakers say and Decfieye them. eG eS RENE RRS IRONS Rin Oe Se ne