The "All American Five" (AA5) is the classic superheterodyne radio design produced from the 1930s through the 1960s. It is named for its use of exactly five vacuum tubes to handle all radio functions without a power transformer.
The weak signal is significantly boosted in strength while maintaining its "shape" (modulation). 3. Detector & First Audio Stage Tube: 12SQ7 (or 12AV6) Action:
This tube takes the audio signal and gives it the Power (current) needed to move a physical speaker. AA5 Radio Signal Flow
The signal travels through an Output Transformer (to match impedance) and into the Speaker . 5. Rectifier (The Power Supply) Tube: 35Z5 (or 35W4)
Do you need help identifying the for old capacitors (the "wax paper" type)? The "All American Five" (AA5) is the classic
It creates an Automatic Volume Control voltage to keep volume steady.
This stage focuses purely on the 455 kHz signal. It uses IF Transformers to filter out everything except the desired station. usually 455 kHz .
It combines the incoming station frequency with a local signal to create a constant Intermediate Frequency (IF) , usually 455 kHz . 2. IF Amplifier Stage Tube: 12SK7 (or 12BA6)