. QST . is electrically identical to that used by your contributorsin their stages.^ One of the advantages of this circuit is its ability to handlesignals of several volts; yet it is reasonably free from cross-modulation effects. This is because the total plate currentis almost constant when the control voltage is varied. Forexample, a drop in the grounded-grid section plate currentcaused by lowers the bias to the cathode-followersection, which in turn increases the plate current in thatsection. It follows then that the cathode-follower sectionis unimpaired by bias and may h
. QST . is electrically identical to that used by your contributorsin their stages.^ One of the advantages of this circuit is its ability to handlesignals of several volts; yet it is reasonably free from cross-modulation effects. This is because the total plate currentis almost constant when the control voltage is varied. Forexample, a drop in the grounded-grid section plate currentcaused by lowers the bias to the cathode-followersection, which in turn increases the plate current in thatsection. It follows then that the cathode-follower sectionis unimpaired by bias and may handle a signal input MIXER. 1-^TOOSC. 6 ^2) of several volts. The degree of curvature of the grounded-grid section then determines the degree of stage gain compares more than favorably with pentodes, and it may have applied. Mixer tracking, instability and oscillator pulling diffi-culties experienced by the authors were to be expected underthe conditions of nonisolation used. A mixer capable of goodgain (approximately 14 times at 30 Mc.) with quiet opera-tion is shown in Fig. 2.^ This circuit has good isolation fromthe oscillator. Circuit gain is independent of oscillator in-jection-voltage change. An alternative oscillator to that used by the authors isshown in Fig. 3. This circuit overcomes switching difficulties OSC.
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectradio, bookyear1915
