June5
I’ve recently found myself in need of an air compressor larger than the one I currently use. After a bit of poking around on my favorite marketplace (eBay), I ran across a manufacturer of compressors within easy driving distance (Dayton, OH). I had a 5HP engine sitting around and decided to put together a compressor.
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May23
From the late 1990’s through the early 2000’s there were a bunch of motherboards (and probably other electronics) manufactured using electrolytic capacitors with rather undurable electrolyte. Assuming you throw your technology away after two years, this isn’t a problem. But I don’t; I try to wring the last bit of useful out of hardware.
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February13
In the interest of full disclosure, it has been months since I got the E2M-1.5 running. The first thing I did was hook it up to the SMC Digital Pressure Switch to see how much vacuum I had.
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November11
In the last episode of the B2301 saga, we watched in horror as capacitors exploded in our beloved monitors. Now begins the task of cleaning up the destruction.
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September6
I’ve known for quite awhile now that my Behringer 2031’s lack sub 60Hz punch. Having a desire for the low-end reproductive capabilities of a subwoofer, I decided to build one. The following article details my process.
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June30
In 1998 or so, there was Spud Gun MkI. There are very few surviving pictures of it and even fewer of it in action. It was built wholly of 2″ PVC pipe. Two 10′ joints made up the tank; the barrel was a single 10′ piece. A 1/4-turn ball valve controlled the firing and it was sticky and hard to turn. More important, the person firing the gun was so occupied with turning the valve that they couldn’t watch the spud fly. MkII needed some sort of quick-action big-bore remotely-triggered valve. Several years ago browsing through Mendelson’s in Dayton, this beauty was staring at me from a shelf. I bit.
It was painted with three or four coats of ugly cafeteria-green paint. I stripped it and put a coat of primer and safety yellow on it. I also plumbed it up with a MAC electrically operated valve and a gauge. Until today, it had never been fired. After some less-than-spectacular firing, I tore it down to make sure the piston hadn’t rusted in place. These are the photos. Also included, photos of firing.
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June15
One of my B2031 studio monitors crapped out in spectacular fashion last night. In a pyrotechnic display reminiscent of an arc welder, an apparent failure of the power supply treated me to flashes of light, copious amounts of acrid smoke, tiny drippy bits of melted metal and an aural experience only available when large alternating currents pass through components undergoing transition from solid to gas.
Downside: It’s broke.
Upside: I get to take it apart, see what broke and fix it.
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March23
This book surprised me. I picked it up on eBay for under 10 bucks and it has to be one of the most information-packed tomes I have ever bought. No, it isn’t useful on a day to day basis, but as a first-line electronics engineering reference, it seems pretty good.
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March4
The bearing for the motor on the E2M1.5 vacuum pump came recently and I took a few minutes to put it on. Since it was missing when I bought the pump, I also fabricated a new cover for the cooling fan.
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