June 18, 2012

Instrumetal...

by Chris Randall
 



After several trips to various light industrial zones, wherein pieces of metal and pressure tanks filled with noble (and not-so-noble) gasses were procured, on Saturday I busted out my shiny new MIG welder, and proceeded to go to town.

Emerging some hours later from an enveloping cloud of plasma and argon (the noblest of gasses) with my first Experiment, I stuck this Planar 4000 contact mic to it, and smote it in various ways, with various implements. The first thing I discovered was that this Barcus Berry piano transducer is fucking sensitive. I'm reminded of that section in Cryptonomicon where dude is doing some safe-cracking and builds his own transducer with a piece of carbon and two razor blades. Seriously, I could hear drug mules crossing the border with duffle bags full of Mexican brown-pack 200 miles away.

So, dialing back on the gain a smidge, I determined that the difference between these transducers and the normal little piezo-soldered-to-a-quarter-inch-cable method is quite vast. I was able to easily fill a couple Maschine groups in about 10 minutes time just by gently tapping my contraption (twss) with various pieces of kipple lying about my office (viz. Dr. Pepper bottle tops, paper clips, the little wooden Q-tips you clean tape heads with) with hardly any smiting actually necessary. Which no doubt pleased my long-suffering wife.

In any event, my next Contraption will be a MATG (Mini Anti-Tank Guitar) which I hope to accomplish the minute my back porch doesn't strongly resemble the surface of the Sun. (twss)
 
 
 

5 comments:

 
 

 
Jun.18.2012 @ 4:07 PM
characterstudios
That's way sweet. Would love to hear some of the sounds you're capturing!
 
 

 
Jun.18.2012 @ 9:23 PM
wgparham
That Barcus Berry is fucking fantastic. Having a matching preamp to go with the piezo makes all the difference in the world. But you have to work quieter than you would think. Sensitive is putting it mildly! I want to get another one to start experimenting with some stereo work. I also want to get the Aquarian Audio Hydrophone (link [www.aquarianaudio.co...]). If I'm doing the math properly (which I might not be), it looks as if you connect the hydrophone to the Barcus Berry 4000xl preamp, the low frequency cutoff on the mic comes out at just around 3hz.

Anyway, awesome stuff. I always wanted to learn how to weld, but it just seemed like too much extra stuff to have to get involved with. That and I always seem to have somebody around who can. But it's just not the same as doing it yourself. Can't wait to see the MATG. That's definitely a project on my list. But I have to finish my reverb tank made out of a hot water tank first.

-William
 
 

 
Jun.19.2012 @ 11:27 AM
Wade Alin
This is def. one of those situations where I would have tried glue, and failed, first. Welding is awesome, but I'm totally scared of welding.
 
 

 
Jun.19.2012 @ 1:35 PM
Chris Randall
It's actually not that difficult, especially with a MIG welder. I made the frame of the MATG this morning, and built the bridge and "tailpiece." Still have to clean it up (broke my sanding disk and the missus has the car currently) but only another hour or so of work before the finished MATG is rattling the windows.

link [instagr.am]

-CR
 
 

 
Jun.21.2012 @ 3:22 PM
Tophe
Cool, I use argon plasma too, but not for welding. I use it to test for trace metals at part per million concentrations. What you've got at the end of the day is infinitely cooler than my silly certificates of analysis.
 
 

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