Nov. 26, 2003 — Power Tube Inc. will develop a prototype of its novel technology for turning the heat of the earth into electrical power after completing a successful engineering review of the ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. Credit: Blackstar Amplification Blackstar has fully engaged beast mode with the unveiling of its ...

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The circuit was designed to create a power amplifier circuit that will utilize E80CC and EL34 vacuum tubes for better results while providing 35 Watts of power. E80CC – a special quality double triode ...

[Limpkin] has an idea for a project that uses a lot of IN-9 Nixie tubes. Where a Nixie tube clock would only use four or six tubes, [Limpkin] is looking at fifty IN-9 bar graph Nixie tubes. These ...