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GRID-BIAS IN R.F. STAGES

A C battery can be used in the radioIrequeucy amplifier, and has the effect of stabilising the radio valve, which makes the control of the receiver very much more efsy. 'As no oscillation can take place if the C battery is of the correct value, the problem of re-radiation is overcome," says a writer in an exchange. This is a mistake which.is liable to cause trouble. Thefirst effect of using a C battery in a radio frequency stage of effective design is to make it oscillate more violently than be: fore, \ because it haa the effect of reducing the high-frequency resistance of the grid circuit. AC battery can only prevent oscillation in such a circuit when it is quite improperly used; and a C battery is applicable to a standard r.f. amplifier when proper steps are taken to balance or "neutrodyne" it.

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https://paperspast.natlib.govt.nz/newspapers/EP19280531.2.180.3

Bibliographic details

Evening Post, Volume CV, Issue 127, 31 May 1928, Page 19

Word Count
146

GRID-BIAS IN R.F. STAGES Evening Post, Volume CV, Issue 127, 31 May 1928, Page 19

GRID-BIAS IN R.F. STAGES Evening Post, Volume CV, Issue 127, 31 May 1928, Page 19