The wide prong of a polarized line plug connects to chassis ground. This point will be referred to as ground. The other side of the line plug connects to the off/on switch which is part of the volume control. The other side of the switch connects to one side of the 35 volt heater of the rectifier tube and one side of the dial light. The other side of the dial light connects to the tap on the heater. This point connects to the plate of the rectifier tube. The plate is bypassed to ground by a .005 mike cap. The other side of the heater goes to one side of the 50 volt heater of the audio output tube. The other side of this heater goes to one side of the 12 volt heater of the detector and first audio. The other side of this heater goes to the heater of the I F tube. The other side of this heater goes to the heater of the converter tube. The other side of the converter tube heater goes to ground. The heaters form a series circuit. The cathode of the rectifier tube goes to the positive side of a 40 mike 150 v cap. This point is labeled high current B plus. This point goes through a 1 k ohm 1 watt res to the plus side of another 40 mike 150 v cap. This point is labeled low current B plus. The negative side of both caps is grounded. Both of these caps are usually in one unit called a dual cap. End of verbal description.