Figure 1 A Low-Voltage RF/IF Amplifier. On the left is an air wound transformer such as that used in an RF or IF amplifier. The primary is the input. The top of the secondary goes directly to the grid, pin 1, of a 12CX6. The bottom of the transformer goes to ground through the parallel combination of a 2.2 meg ohm resistor and a 0.01 u f capacitor. The cathode and suppressor grid, pin 7, go directly to ground. The screen grid, pin 6, goes directly to plus twelve volts. The plate, pin 5, goes to the top of the output transformer which is similar to the input transformer. The bottom of the primary goes to plus twelve volts. The secondary is labeled RF Output. End verbal description.