. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. Figure Figure Ancillary circuitry—With magnetic cathode ray tubes it is helpful if a negative HT supply is available, since the cathode can then be earthed, the heater can be excited from the same supply as feeds the other valves, and no strain is imposed on the heater-cathode insulation. Figure is suitable for a triode tube and Figure for a tetrode. If there is no negative supply. Figures and are possible, but the heater-cathode voltage must be wa
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. Figure Figure Ancillary circuitry—With magnetic cathode ray tubes it is helpful if a negative HT supply is available, since the cathode can then be earthed, the heater can be excited from the same supply as feeds the other valves, and no strain is imposed on the heater-cathode insulation. Figure is suitable for a triode tube and Figure for a tetrode. If there is no negative supply. Figures and are possible, but the heater-cathode voltage must be watched, and a separate heater winding in the mains transformer may be required for the tube. No bleeder is necessary across the EHT 464. 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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