The AC4TV schematic reveals a straightforward, single-ended Class A design — very much in the spirit of vintage low-wattage British amps.

The schematic shows a standard common-cathode gain stage. The input grid is grounded via a 1M resistor (R1) and a 68k grid stopper (R2). The cathode is biased with a 1.5k resistor (R3) and a 47uF capacitor (C3). This is a high-gain, vintage-correct top-boost style stage.

The amplifier features a straightforward control layout, with a single volume control, a bass control, and a treble control. The AC4TV also includes a top boost circuit, which provides a significant increase in treble response when engaged.

The schematic tells you what connects to what (electrically). The physical layout tells you where that connection lives on the board.

When you finally get your , remember that a schematic is not a physical layout. The AC4TV uses a double-sided PCB with surface-mount components in some revisions (pre-2010) and through-hole in others (2011+).