Electronic apparatus for biological research Electronic apparatus for biological research electronicappara00dona Year: 1958 CATHODE RAY TUBE 50'^, the sweep will undergo severe brightness modulation at 50'-^ unless the supply is exceptionally well smoothed. A better method of achieving trace-brightening is to employ an L-C oscillator, which may conveniently operate at radio-frequency, which is switched on by the square wave from the time-base generator. The oscilla- tions are picked off inductively (Figure ) or capacitively {Figure ) and rectified to produce a positive-going square
Electronic apparatus for biological research Electronic apparatus for biological research electronicappara00dona Year: 1958 CATHODE RAY TUBE 50'^, the sweep will undergo severe brightness modulation at 50'-^ unless the supply is exceptionally well smoothed. A better method of achieving trace-brightening is to employ an L-C oscillator, which may conveniently operate at radio-frequency, which is switched on by the square wave from the time-base generator. The oscilla- tions are picked off inductively (Figure ) or capacitively {Figure ) and rectified to produce a positive-going square wave at the grid of the cathode ray tube. The oscillator may conveniently be switched by returning HT + 6 in of twisted flex used as small high- voltage caoacitor from generator
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