Voull find Hhis screen-grid valve is belter Jhe OSRAA My 324 MadE IJ EAJGLAED PEReEc radlo detection is 3 matter Of Perfect valves. Thls new 2.5 volt Osram is, Ilke the entire 2.5 Osram series, definitely non-microphonic Shocks Or vibration do not affecc ic. kc j8 the ONLY screen-grid valve that is perfectly noiseless Jn eperation: You can test Osrem 3 2.5 a8 Youp Radio Dealer s. Ask to switch On any set, tune cuneeoiorifY Oue stations and cap the 224 Op 227 detectora 16 It Is microphonic the speaker will emit 8 Pinging noises indicative of imperfect reception: 1f the microv Phonic valves are replaced by Osram 2.5s, capping will resulc in allencea Ask Youp dealer alse to show you the {ull Osran voige eayo Osrana 2.5 MY22+ My.227 9 MX,245 & MX280 25e valves MADE IN ENGLAND Advertisement of the BRITISH GENERAL ELECTRIC CO. LTDo 37 Taranaki Street; Wellington: Brunswick Bldgs-, 49 High Street, Auckland: Hannaford Chambers, 145 Worcester Street, Christ- church:
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https://paperspast.natlib.govt.nz/periodicals/RADREC19310605.2.74.1
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Radio Record, Volume IV, Issue 47, 5 June 1931, Unnumbered Page
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163Unnumbered Page Advertisement 1 Radio Record, Volume IV, Issue 47, 5 June 1931, Unnumbered Page
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