Mutchus

Well hello everyone. Today we’re going to talk about cigar box guitars (CBGs). For a while now, I’ve been noticing more and more references to CBGs creeping into popular websites, including one of my favourites, boing-boing.net. Here are a couple of recent articles from there: http://boingboing.net/2012/04/13/cigar-box-guitars-book-photo-g.html http://boingboing.net/2012/02/14/grand-re-opening-of-the-cigar.html It was my birthday last month and my friend Mike bought me a copy of “Cigar Box Guitars” by David Sutton. It’s a great book that explains not only how to make four different cigar box guitars, step by step, but also interviews some very interesting characters involved in the cigar box guitar scene. I decided to have a go at making one of the CBGs described in the book, and that’s what this post is about. Firstly I got my hands on a Cigar box, graciously donated by another very good friend of mine (thanks, Kevin). I searched around for a while for suitable scrap wood for the n...

Function of Each Part of D.C Generator A D.C Generator consists of the following parts: 1.        Yoke or magnetic frame 2.        Pole cores and pole shoes 3.        Field windings 4.        Brushes and brush holders 5.        End covers 6.        Armature core 7.        Armature winding 8.        Commutator 9.        Shaft Fig 1. DC Generaotor Parts 1.        Yoke or magnetic frame: The outer most frame is known as Yoke. It is made of high permeability material possessing sufficient mechanical strength. Cast iron is used in small machines and cast steel or rolled steel is employed in large machines. The Yoke serves two fold as:                  (...

Power Amplifier with quasi complementary model is the final power amplifier with the transistors of the same type (N all) or (P all), not using transistor pairs. Connecting post part 1, in section 2 is still to review mosfet power amplifier. Nmos350 / Nmos500 Two output stage configurations capable of delivering up to 350 watts or up to 500 watts into a 4 ohm load.  Schema Diagram  Layout Nmos350 Layout Nmos500 Power Supply Final Set up And Adjustment No attempt should be made to set up or test a power amplifier module that is not correctly mounted on a heatsink. Make sure the main power supply is fused and the work area is clear. First check all your work and make sure the output devices are insulated from heatsink. The set up is done without an input or a load connected to the power amplifier. 1. Check the power supply is operating correctly and verify the rail voltages. Switch the power supply off and check with a multimeter that the rail capacitors have discharged. 2. Corr...

The tremolo arm on our vintage Hofner Colorama II is supposed to be held on with a type of thumb wheel screw, but that’s obviously been lost at some stage and the remaining stud/screw had been hammered down to act like a rivet and hold the tremolo arm on, irreversibly damaging it (the stud) in the process: The tremolo unit has already been removed from the guitar, but can be disassembled further by removing the big screw holding the arm lever on: Here's what we're left with: I've previously drilled into the stud to remove the arm, and the remaining stud has to be unscrewed as it is completely destroyed. That can be forced out with a pair of mole grips (vise-grips), by turning it in an anti-clockwise (counter clockwise) direction: There's quite a bit of rust on both this part and the tremolo unit itself, so a wire brush is used to remove it: I'm also rounding the front end of the lever, since it was originally square in shape and was catching on and damaging the trem...