. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. DIRECT-COUPLED PRE-AMPLIFIERS In the case of pentode cathode-followers the bias is determined by the screen potential, and it is this which must be varied to find the zero grid current condition. The range of anode voltages which it is necessary to provide for triode cathode followers, and of screen voltages for pentode versions, lies between + 40 *25. HT + HT- Fi^ure Please note that these images are extracted from scanned page images that may have been digitally enhanced for reada
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. DIRECT-COUPLED PRE-AMPLIFIERS In the case of pentode cathode-followers the bias is determined by the screen potential, and it is this which must be varied to find the zero grid current condition. The range of anode voltages which it is necessary to provide for triode cathode followers, and of screen voltages for pentode versions, lies between + 40 *25. HT + HT- Fi^ure Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donaldson, Peter Eden Kirwan. New York, Academic Press
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