Sunday, May 16, 2010
Makerbot - 3D Mechanical Prototype Synthesis
Makerbot is an open source robot that helps people make robots that make things.
"The only fear is that it can Replicate itself" - ....When i had posted first..
MakerBot Industries is a Brooklyn, New York-based company founded in January 2009 by Bre Pettis, Adam Mayer, and Zach "Hoeken" Smith producing 3D printers. MakerBot builds on the early progress of the RepRap Project. - 2013 updated
Complete Pro 3 axis CNC kit
They manufacture a high-tech precision, rigid CNC mill/engraver for the price of a CNC engraver.
Updated - Oct 2013
Specialists in very high quality audio, Designs Amplifiers, Preamplifier, Phono Preamplifier and R-evolution Turntable etc.
Adapting New Technologies into Classic Hi-Fi systems, without compromising on Decades of Audio tradition.
MITA The Mains Independant Tube Amplifier
SE battery tube amplifier
Stereo SE 15w / Channel, Three Silver Rock transformers per channel, Fully Lithium battery powered, All silver internal wiring, Veneer to customer's request.
Saturday, May 15, 2010
Audio Hi-Fi DIY - Claudio Bonavolta
(Proper Loudspeaker Design is more complex than Launching Rockets into the Ocean )
Tapered Quarter Wave TubeFirst described by Paul Voigt in 1930, TQWTs allow a good quality-to-price ratio. They are also easy to build.Similar to transmission lines, the TQWT is different by its shape, a kind of horn is used as back load but the driver is not placed at the beginning of the cone as usual but on its side.
In closed boxes, the back wave of the speaker should be completely absorbed (= converted in heat) by the damping material.As the speaker is nearly transparent to sonic waves, if a back wave returns after a reflection on the back wall, some part will also come out through the speaker with some delay giving a not very clean sound.