FIG. 1.—Diagram of Unit for supplying Grid-bias for an A.C.-operated or other Receiver. Terminal marked + is connected to negative of B supply and to centre — taps of all filaments of receiver valves. Terminal marked —1 supplies bias for high-frequency amplifying valves. Terminal marked —2 supplies bias for audio-frequency amplifying stage. Terminal marked —3 provides high bias for power stage employing 171 or similar valves.
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Radio Record, Volume III, Issue 10, 20 September 1929, Page 46
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64FIG. 1.—Diagram of Unit for supplying Grid-bias for an A.C.-operated or other Receiver. Terminal marked + is connected to negative of B supply and to centre — taps of all filaments of receiver valves. Terminal marked —1 supplies bias for high-frequency amplifying valves. Terminal marked —2 supplies bias for audio-frequency amplifying stage. Terminal marked —3 provides high bias for power stage employing 171 or similar valves. Radio Record, Volume III, Issue 10, 20 September 1929, Page 46
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