Unnumbered Page Advertisement 1

Radio Record, Volume V, Issue 4, 7 August 1931, Unnumbered Page

This power valve i noiseless [ 8es MADE I FNOLAND and made better TKha is the Osram MX.245 power valve. Within its characteristic limits: it gives unparalleled results in all out- put clrcuits extraordinarily distortionless amplification, ample current capacity, and complete freedom from all microphonic noises. Ie is the only 245 valve in the 2.5 volt range that 'is noiseless under all conditions of eperation: 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 op 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 Osra0 volge eaivo Osram 2.5 MY_ 224, MY.227_ MX.245 & MX.280 238 vated MADE IN ENGLAND Advertisement of the 'BRITISH GENERAL ELEOTRIC Co. LTD: 37 Taranaki Street, Wellington. Brunswick Bldgs-, 49 High Street; Aucland: Hannaford Chambers, 145 Worcester Street, Christ- church: TIZZZZZ