Unnumbered Page Advertisement 1

Radio Record, Volume IV, Issue 51, 3 July 1931, Unnumbered Page

FIhis power valve is noiseless 4 Uts MADE IJ: ENCMANJD and made better Trhai is the Osram MX.245 power valve_ Within its characteristic limits it gives unparalleled results in all out- put circuits--extraordinariiy distortionless amplification, ample current' capacity,` and complete freedom from all microphonic noises. It is the only 245 ~valve in the 2.5 volt range that is noiseless under all conditions of operation: You can test Osram 2.5 superiority at Your Radio Dealers: Ask to switch on: any set, tune out all stations and tap the 224 Or 227 detector. If it is microphonic the speaker will emit 2 Pinging noise, indicative of imperfect 'reception: If the microphonic valves are replaced by Osram 2.5s, tapping will result in silence: Ask your dealer also to show you the full Oska volge_ vovo Osram 2.5 MY_ 224 MY.227_ MX.245 & MX,280 25e valves MADE IN ENGLAND Advertisement 0f the BRITISH GENERAL ELECTRIC CO. LTD 37 Taranaki Street;; Wellington: Brunswick Bldgss, 49 'High Street; Auckland: Hannaford Chambers, 145 Worcester Street, Christ- church: