Sam has some wonderful Audio and Video circuits. He is from Greece the land of Mythology and the Gods. These are Electronic Circuits and DIY Projects for the hobbyist.
There is a huge collection of Valve or Vacuum Tube Power Amplifier circuits. Even Hi-Fi Preamplifiers based on these tubes. Power Supplies and Test Instruments you could build to power-up your Hobby Bench at low cost.
He has circuits for the Automobile and battery as well. Clock and Timer circuits for Home Automation. VU Meters and Graphic Equalizers to make your Audio dream project.
When i came online in the late nineties, i discovered Sam and other sites having many circuits and ideas. Ham radio folk were also in good numbers. That was an Innocent and Informative Web, it was heaven.