Treble cut. On the left is an input terminal which connects to the grid of a triode, 12 A X 7. The grid goes to ground through a 470 k ohm resistor. The cathode goes to ground through a 1.8 k ohm resistor. The plate goes to B plus two through a 100 k ohm resistor. The plate also connects to one end of a 0.1 microfarad capacitor. The other end goes to the grid of a pentode, type not specified. The grid of the pentode goes to ground through a 470 k ohm resistor. The cathode and grid 3 go through a resistor, value not given, to ground. The screen grid of the pentode goes to B plus one. The plate goes through the primary of an output transformer to B plus one. The secondary of the output transformer is connected to a speaker. Now back to the grid of the pentode. It connects through a 0.0022 microfarad cap to the top of a 500 k ohm pot. The bottom end is grounded. The wiper connects to the top of the pot making it a rheostat. End verbal description.