A cornucopia of crazy for the holidays

First, did you know that RCA made a vacuum tube that was usable as a phonograph pickup?

Second, Feena Electronics. They introduced an interesting DJ MIDI controller in 2006. Since then, nothing. The last post to their forum was September 21.

Finally, this guy is building a duplicate of the old Metasonix Hellfire Modulator. He’s making a chassis for it out of plain sheet metal, and he apparently mated two toaster ovens together in order to bake powder-coating onto it. DIY FTW!!!

3 thoughts on “A cornucopia of crazy for the holidays”

  1. yes: it’s very creative and difficult to make a copy of something that was created in the past decade with off the shelf parts, has full documentation, theory of operation and schematics available.

  2. gosh I didn’t know that a double wide toaster was created in the past decade with off the shelf parts, had full documentation, theory of operation and schematics available.

    now you can make top brown garlic bread ardently. Insatiably. Deliriously. Garlic bread you will love for decades. toast that is exceptional and superlative in every way.

  3. Regarding the 5734 — the tangential history is pretty interesting, and leads all the way back to the Deforest Audion.

    DeForest realized that his gaslights flickered to the tap of his telegraph. He later realized, that this was not the result of radio wave energies, but acoustical energy… These experiments led to him encapsulating a flame (later a burning cathode) in a bulb and manipulating it with a vibrating Grid.

    Then there was the Kathodophone, a microphone of sorts that was essentially a triode — opened up to the air on one side. Vibrations hitting the grid, coupled to the device by a small horn would change the flow of electrons and ions in gas (air).

    And yes, the REVERSE is doable too. The plate structure of a triode can be coupled to a horn and make a speaker. Electrical energy into vibration = speaker.

    I’ve been meaning to use the 5734 for a while. However, it’s of note that it was most used for seismic instruments and other scientific uses. It is rather easy to damage the diaphragm that seals the probe from the plate by rotating it more than 0.5 degrees! Careful there…


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