Parts and assembly of an old thermionic vacuum tube 24A - RF screen-grid tetrode from 1929.

A marvellous device

The radio tube is a marvellous device. Although it appears to be a fragile affair constructed of metal and glass, in reality it is a rugged instrument that makes possible the performing of operations, amazing in conception, with a precision and a certainty that are astounding.

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3W Single Ended Class-A Stereo Tube Amplifier

Small Tube Amp for Home

3W Stereo Quality Tube Amplifier. Based on August 1955 UK Mullard 3-3 circuit design using EL84, EF86 and EZ81 vacuum tubes.

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Photo Gallery

Small and beautiful stereo tube amplifier.
Audio amplifier model 1955 Gen2 front view.
Another view of the 1955 Gen2.
Audio amplifier model 1955 Gen2 rear view.
Audio tube amplifier on a small bookshelf.
Red-orange glow in thermionic vacuum tubes of the amplifier.
Audio tube amplifier with speakers on a coffee table.

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