Figure 3 resistance coupled amplifier circuit. In this diagram there are labels on the parts and it matters if they are upper or lower case. Letters will be indicated as capitol or small. There are two input terminals on the left. The lower, cold, one is connected to ground. The upper, hot, one is connected to the grid of a triode tube. The input terminals are labeled capitol E, small s i g. A resistor is connected from the grid to ground. It is labeled capitol R, small c. The cathode goes through a resistor to ground. The resistor is labeled capitol R, small k. There is a capacitor connected in parallel with this resistor. It is labeled capitol c, small k. The plate of the triode goes through a resistor labeled capitol r small b to a point labeled capitol e small b b. The plate also connects through a capacitor labeled capitol c small c to the hot output terminal. The cold output terminal is grounded. A resistor connects from the hot output terminal to ground. It is labeled capitol r small c f. The output terminals are labeled capitol e small o u t. This completes the description of figure 3.
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