Trade Notes
A New Valve "THE "Osram" Valve Department of the British General Dlectriec Company announces fhe arrival of a new type of 4v. super power valve, which
will: be known as-the "Osram" P.XA, The characteristics have been developed specially with the. idea of its employment in the last stage of A.C. sets using’ indirectly ‘heated cathode valves in the early stages. In order to furnish the required emission for a large power output, the P.X4 is fitted with a heavy filament consuming 0.6 amps. The current is negligible when drawn from the main. The valve. provides a power output between P.625A and the L.S5A power valves. It can be allowed to dissipate 10 watts at its maximum plate voltage of 200. The P.X4 completes a very useful range of 4y. indirectly: heated A.C. valves,
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https://paperspast.natlib.govt.nz/periodicals/RADREC19300718.2.61
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Radio Record, Volume IV, Issue 1, 18 July 1930, Page 43
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135Trade Notes Radio Record, Volume IV, Issue 1, 18 July 1930, Page 43
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