Unnumbered Page Advertisement 1

Radio Record, Volume V, Issue 14, 16 October 1931, Unnumbered Page

This power valve icy noiseless ! ~ts MADE I7 ENOLAND and made _ better Tina 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. Ic 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: a: 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 fulF Osran range of 'Osram 2.5 volt valves MY 224 MY.227, MX.245 & MX280 2e vaives; MADE IN ENGLAND Advertisement of the BRITISH GENERAL ELECTRIO CO. LTD: 37 Taranaki Street; Wellington: Brunswick Bldgs , 49 High Street, Auckland: Hannaford Chambers, 145 Worcester Street, Christ- church: