Dean W. Armstrong

Scientific and other projects in astronomy, geoscience, physics, and electronics.

Wednesday, September 18, 2013

random recent interesting titles

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Oversharing: Yesterday's catalog search items that caught my eye. (My search was all T acquired in the past six months published in the ...
Thursday, June 27, 2013

lemon juice and fine steel wool works on rust on a stainless steel dishwasher

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I had a rust stain on the interior of a stainless steel dishwasher from contact with a rusting pan, and after having no success with CLR and...
1 comment:
Wednesday, February 13, 2013

Why toolboxes and tool handles stink.

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For years I've encountered this issue, and it always perplexed me: why do a lot of toolboxes stink? I had always assumed it was rela...
37 comments:
Monday, January 21, 2013

CFL lifetime report #2

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A third CFL failed in my torchiere conversion I did back in the winter of 2008. I used this light about 7 hours a day consistently until m...
Thursday, April 26, 2012

Improvements on my first cigar box guitar build.

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To improve my first cigar box guitar build, I added a piece of 2" x 1/4" mahogany mull casing (ripped to 1.5") to the neck. I...
1 comment:
Wednesday, February 08, 2012

First Cigar Box Guitar build

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A few photos of my first cigar box guitar. For cigar boxes both Hyde Park Cigars (the place on 53rd and Harper) and Binny's have them,...
2 comments:
Monday, February 06, 2012

Audio Acoustic Amplifiers with no electronics

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Amplifying audio without the use of any electronics: Audio Acoustic Amplifiers from Experimental Musical Instruments.
Friday, December 02, 2011

"Wrong Emphasis on the Wrong Syllable"

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I'm just putting this here because I would doubt Facebook or Twitter would archive very well. Mike Myers, in the movie "View from t...
Monday, August 22, 2011

Refrigerator payback

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My current fridge (a Hotpoint Foodcenter 24) is older than I am. It was originally the avocado color shown in the ad; at some point someone...
3 comments:
Sunday, August 14, 2011

7.72 microRads/hr

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A 39 day long sampling of every minute leads the geiger counter to a long term average of 7.72 uR/hr. That's 56658 sampling points. T...
Wednesday, July 20, 2011

New Moon of Pluto

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http://www.cbat.eps.harvard.edu/cbet/cbet002769.txt
Tuesday, June 28, 2011

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whatever, it doesn't matter, the blog is dead in practice if not in theory. The hits now a days are image searches and the occasional c...
4 comments:
Monday, June 13, 2011

Great Saturn Cassini video

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Go out and see the Astronomy Picture of the Day for June 13th. It's an awesome video of the Saturnian system from Cassini. If all the...
Friday, June 03, 2011

Natural background radiation in Chicago

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A recent inquiry brings up the question of what's the normal natural background radiation rate in Chicago? Using the EPA's online t...
Saturday, May 14, 2011

CFL lifetime report

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I just noticed that a second CFL failed in my torchiere conversion I did back in the winter of 2008. I use this light about 7 hours a day ...
2 comments:
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Dean W. Armstrong
Dean W. Armstrong has a B.A. from the University of Chicago in the geophysical sciences. My opinions are my own and do not reflect anyone or anything else's, unless they just happen to.
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