DIY Air Purifier

I've been having allergy problems.  A few visits to the ENT doc plus a battery of scratch tests narrowed down to a massive penicillium mold allergy.  Well, I can't get the carpet ripped out of my house for a few more weeks, but I needed something to knock down the irritant count now.  Looked at air purifiers, at the direction of the allergy specialist nurse, and talk about pricy – some up around $800.  But there's nothing exotic going on inside, no electrostatic precipitators or other tech, just a fan, a filter, and some control electronics.  So... off to the search engine of choice to look up "DIY air purifier" and here's the main result courtesy of Consumer Reports and University of Michigan.
Here's my version, front & back: 

About the only mods I made from the UofM design were to put the filter on the back of the fan, and to seal it down all around with duct tape.  It sucks down against the fan better that way, so instead of trying to blow the filter off it's being pulled into a stronger configuration and the tape job doesn't have to be as robust.  The filter is a 3M Filtrete 1900 Maximum Allergen model, about $20 at Lowe's.  Be sure to get the flow direction right when you tape it on.  There are arrows on the filter's edge and it's not hard to figure out.  The fan is an old $10 cheapie.  Luckily 20"x20" seems to be a common size for both box fans and filters, and everything meshed right up.

Cut to the chase: Yes, it works.  I haven't had a sniffle in over 48 hours now.  While I was at it, I got one for the central air system too and effectively turned the whole house into one big allergen filter.

But I still popped for a nice $130 ready-made HEPA purifier for the office.  Quieter, and with nice timer and speed controls.  It seems to work about the same otherwise.  Effective, cheap, quiet: pick any two.

Damnit, wish I'd known this two years ago.

WSM 650 this evening: That was a treat.

This evening Eddy Stubbs at WSM had Merle Haggard in studio picking the records.  In between songs, they’d have a mini-interview, or discuss some personal or historical aspect of the song just played or about to play, or just talk about something country music related.  There was quite a discussion about the manners expected in the rough-and-tumble of roadside bars back last mid-century.  (If you invent order from ACME a time machine and want to go honky tonkin’ back in the 1950’s, be sure and stop off at about 11:40 CDT on 10/24/2012 in the listening area to brush up on how to act.  If I remember correctly, the three main rules were to never touch another man’s woman, beliefs, or his hat.  And be sure to park the Delorean in a discrete spot, it'd probably stick out too much around all the Fords and Chevys.)  

They also discussed the hows and whys of country music sounding better after dark on AM radio, and I concur.  If you've never tried it, especially via long-range skywave propagation, you're missing out on a big chunk of America.  WSM, being an FCC-designated clear channel station, is the only transmitter in North America licensed to operate on 650 kHz, and it pumps out a healthy 50 kilowatts day and night.  If you're east of the Rockies, you can probably step outside on any clear night and pick it up on your car's radio.

Finally, in a parting comment as the show ended just before midnight, Stubbs mentioned that tomorrow (i.e., today) would be Minnie Pearl’s 100th birthday.  That’s quite a coincidence.

A unique view of WSM’s Blaw-Knox tower, from over at the Radio-TimeTraveler blog.

p.s. 10/26/12: link to WSM's archive of the evening.

Shortwave Blues

There are all kinds of local blues radio shows around here, just check the WQRZ-LP and WWOZ web pages.  But if you want long-distance up-north blues, the shortwave show Last Radio Playing (from a line in Bob Dylan's song Shooting Star) is the answer.  Because it's on shortwave, the frequencies and times are all over the place.  You'll have to go check the hosting station's schedule over at the swamp that calls itself WWCR.  Here's a direct link – search on "Last Radio" and even then it's not easy viewing.  Currently Last Radio Playing is on starting at 7pm Friday @4840 kHz, again at midnight Friday (well, Saturday morning) @3215 kHz, 11pm on Saturday @3215 kHz, 6pm Sunday @9350 kHz, again Sunday at 8pm @3215 kHz, and 6pm Tuesday @9350 kHz.  There, got all that?  Yeah, no wonder shortwave's not so popular with the kiddies.  And for added fun, the frequencies shift with the seasons, usually to lower frequencies for better propagation as the nights get longer, so you got to keep checking the schedule.

But.  It is worth it.

Look at last weekend's line-up (forgive the spelling, I'm not going to go look these up, bunch aren't on the web anyway): JB Hutto & The Hawks, Chris Duarte, Memphis Slim, Slim Harpo, T-Bone Walker, Commander Cody & his Lost Planet Airmen, a big long interview with Todd Edmunds the bass player (way better than the one Mr. Rogers did), Shawn Starsky, and wrapped up with Link Ray.  And I've left some out. Tonight was the Halloween run-up show, with everything from BB King to Echo and the Bunnymen then back to Screamin' Jay Hawkins doing I put a spell on you.  "Eclectic" isn't a strong enough word here.  (the term scattershot sorta works, and so did the show)  Bonus, you can pretty well get this anywhere on the globe you happen to be with the right receiver and a big enough wire hanging out of it.

But if you stray outside of this show and maybe the country music show that sometimes follows, hoo-boy, watch out.  WWCR is indeed a swamp, a very strange swamp.  Enjoy this island of blues in its midst.

Fourteen grand... for a hybrid?

It seems so.  Gucci & Bianchi teamed up to produce this absurdity.

P.T. Barnum was right.  And I am embarrassed for both the cycling community and humanity.

It's kind of like Total Recall

You know the scene.

Yes, this is awkward.

Though I'd add "manned" somewhere in the caption.  The Mars rover program is going pretty damned well.

Remnants of the Cuban Missile Crisis

Seen over at the BBC, when one of their news crews goes traipsing through the backwoods of Cuba to track down an old missile launch site.