Show longer life tor for your tubes tube for forage borage battery economy and longer life of the vacuum tube it Is always best to employ tile minimum filament brilliancy consistent with ode ade quate audibility of the signals belna being received nothing Is gained by burning tile the filament above tile the temperature necessary for maximum regeneration and white heat Is seldom necessary to accomplish tills this according to radio broadcast by resorting to a two stage amplifier in receiving from dig flint broadcasting stations ample audibility dibi lity can ho be obtained without excessive filament brilliancy As a matter of fact signal strength may well be sacrificed to purity of tone I 1 in n voice and music for after nil all it la is faithful reproduction of sound rother rather than maximum noise which makes radiophone reception enjoyable |