(under subclass 157) Subject matter wherein the signal derived from the first of the two cascaded amplifying devices is coupled to the screen grid or an electrode other than the control grid or cathode, such as the anode electrode or the suppressor grid of the following cascaded amplifying device, which device is of the vacuum tube type.
SEE OR SEARCH THIS CLASS, SUBCLASS:
64, for space charge grid tube amplifiers wherein the first grid next to the cathode is biased positively with respect thereto and the signal input is applied to the grid next in succession from the cathode which is biased negatively with respect to the cathode.
185, and 188+, for input coupling to a vacuum tube amplifying device including input coupling to an electrode other than the control grid or cathode.
SEE OR SEARCH CLASS
324, Electricity: Measuring and Testing,
124, for amplifiers combined with an electrical measuring device wherein the input is applied to the anode of the amplifying device (e.g., inverted amplifier).
