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In the schematic above, we see a direct-coupled version of the bootstrapped compound amplifier. This circuit draws the same amount of current as the capacitor laden version, 20-mA, but yeilds worse performance. (We eliminated the need for an internal coupling capacitor, but at the cost of lost gain and a higher output impedance.) Still, not having an internal coupling capacitor has its advantages, less expense and reduced phase shift amongst them.
The next step to SRPP, is to eliminate the redundant resistors. If you examine the circuit above, you'll see that two 10k resistors are merely excess baggage that are both effectively in parallel with the load impedance. These resistors require 10-mA of current and do not enhance the performance of the circuit. This will not appear obvious to many readers, as they will see these resistors as useful contributors to the grounded-cathode amplifier's and the cathode follower's functioning. A little reflection will show otherwise, as the 5k load they represent only burdens both tubes and, besides, the circuit can function perfectly without them.
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