Heathkit HiFi Site - by Dan Cradler
    Has manuals schematics and pictures

Heathkit UA-1 (or UA-2 or AA-61) - Schematic

Heathkit W-5M Amplifier & Power Supply - Schematic

Heathkit W-6M Amplifier & Power Supply - Schematic

The Hero Robot Web Source - Lots of info on HERO Robots

Keeping Personal Robots alive!” Heathkit HEROS (Jr, 1, & 2000)

Last update: 26 Oct. 2002