. Electronic apparatus for biological research . Figure Phantastron In this circuit one valve is used to its utmost; not only all three grids and the anode, but also the cathode fluctuate in potential to contribute to the action. Stripped of unessentials, the circuit has the appearance of Figure Ri, i?2 and ^3 are merely a potential divider across the HT supply to

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Keywords: ., bookcentury1900, bookcollectionameri, bookcollectionbiodiversity