81 Years Ago Today, the Future Began

Article on the bombing of Hiroshima at This Day in Aviation.  Go read the whole thing.  Then read the comments, especially this one:

One of the things that most irritated my dad about WW2. People assume the atomic bomb dropped on Hiroshima was a sneak attack. Far from the truth he would tell you if he were still with us. Around this time every year, as we were growing up, he would repeat his bit of history. He was a sailor aboard the aircraft carrier YORKTOWN. For a solid two weeks before the atom bomb was dropped he and his shipmates loaded the small bombers launched off his carrier’s deck with leaflets. Not bombs, but leaflets written in Japanese, warning of the imminent and total destruction of their city. That was one point he would god damn anyone for if you disagreed. He and his comrades in arms spent two weeks sweating their guts out giving Hiroshima a chance we didn’t get at Pearl Harbor.

Onward with matters at hand.  The past is settled.  We have our own times, our own challenges.

A Little Something I Heard Last Sunday Morning

The Sound of Soft Power, from the BBC (just under 1 hour), about the use of shortwave broadcasting for soft power projection beginning in WWII up through the current day.  Naturally it wasn't archived on any their sites – or at least none that I could easily find – but fortunately we have the above link from The Shortwave Archive.  Additionally, here are two brief articles on the show from The SWLing Post, from May and July.

Somewhat ironically, I didn't hear the show on shortwave.  Rather, it was on an extremely local WFSU FM translator station W244BM-FM, a mere 7 miles away in Eastpoint. (coverage map inset right)  Not nearly as impressive as global shortwave, but when it's all that's currently available you take what's there.

Anyway, give it a listen.  It gives an interesting historical perspective.

On This 1st Day of August, Fingers Crossed

So far, so good.

I'll Be There

Trailer for Coyote vs. Acme

Opens August 28th.

Fat Tire Musings

Following up on an earlier test ride of a friend's fat tire bike, I've done some looking around at these weird beasts of burden.  With no real mountain biking nearby but plenty of bikeable beaches, one might make sense.  First question: 4.8" wide tires, or will 3.8" tires suffice?  It took a few searches, but this forum discussion at Mountain Bike Review sums it up nicely: you can get by with 4", but when the tide's in and you can't ride down on the hard damp sand, something in the 5" range is the way to go.  

Next up, can I get by with a cheap big-box store-grade bike for $500, or do I have to shell out 5x bucks for the real deal?  I mean, sure, for something I'm going to ride all the time it's a no-brainer.  On the other hand, if it's  something I'm going to take on the beach a half-dozen times a year, maybe cheap is the way to go.  Hopefully "cheap but serviceable" and not "cheap disposable junk."  Here's a video comparison close to what would be my options.  Unfortunately they've both gone up about 25% in price since that video was made, but that is the way things go these days.

Other significant considerations are how much would I actually use the thing, and do I already have a bike that can do the job well enough?  Looking around, I was able to identify eight nearby areas where a fat bike would be useful, of which perhaps half are terrain where nothing else will serve.  So maybe that's justification enough.  Maybe.  Frankly, I need to do some exploring when the weather cools.

And finally, where to keep the thing?  I live upstairs in a fairly small place, and hauling 35 lbs+ of steel each way while tripping over an idle bike when it's not in use, well, it's just not all that appealing.  But it could be, given good enough reason.

Will mull on this one some more, and with data from some exploratory trips once the weather cools.  Not a decision to be made lightly.  Still though, the idea of doing some more beach-centric yet still hardcore biking has a lot going for it.

The View Up 6th Street

Just a nice sunset afterglow, seen from near the foot of the main pier at The Hole.

And yeah, the colors really were that vivid.

Short day on the Gulf today.  The snappers were small-ish but legal, caught 3/4 of limit before winds picked up.  Lots of long, moderately low swells off of TS Bertha, in the 3' range.  Here's the view from a data buoy somewhat to the SE of where we fished.  Taken at sunset this evening, you can still see the effects of the long slow swells which have subsided down to 2'.

The discontinuities between the images are caused by the swells.  You ought to see this view in a hurricane; in a Cat 5 it begins to resemble a Weierstrauss function.

With that, I Am Tired.  Good night!

A Decent Little Power Bank, With a Few Limitations

A few weeks ago FCEM purchased a few of these small 200w Powkey power banks (Amazon link, $80), and I was asked to evaluate one for possible ham radio use.  My overall impression is that it's a pretty good unit, but it is slightly dated and decidedly sub-optimal for ham field use.  Read on, but first let's get the TLDR out of the way.

Pros: Intuitive operation.  All-in-one unit.  4-LED "gas gauge."  Sine wave AC output.  Easy solar.

Cons: "12vdc" outlet is only 11.5vdc.  USB-A only outlets.  AC inverter puts out some radio interference.

Maybe/Maybe Not: Is 200 W maximum output and 146 W-H total enough for your application?

OK, now let's unpack the TLDR.  Intuitive operation, sure.  On/off switch then AC on/off switch, then plug in whatever you're using.  Be sure to take it out of the fitted foam-lined case though first, because there's a vent on each side.  That's easy.  Sine wave AC output is what you want, because that's also the kind of current that comes from home wall sockets.  (Earlier, cheaper power inverters put out "modified sine waves," a sort of stair-step approximation that could damage many devices.  Not recommended.)

It's easy to interface with solar, and in fact I'd recommend buying the combo pack with a 60 watt solar panel for $135 total (link).  Just plug it in, and in good sun it should fully recharge a spent bank in about 4 hours (if the quoted numbers are right).  Of course, you still can and should recharge the bank from a wall socket before heading out.

Now for the downsides.  First and foremost is the 11.5vdc problem, with a 10 amp maximum output current at that.   Some 12vdc devices are OK with this, many aren't.  You can step it up with a boost converter (link, $30), but (a) that's $30 more you have to spend, and (b) you now lose the all-in-one convenience factor.  Oh yeah, and (c) you've got to wire plugs on this extra unit, for whatever plugging you're planning.  But it is doable.  Finally, that 10 amp limit means that you won't be running full-power on any radios – 115 watts input maximum, which translates to about 25 watts RF power out.  So QRP, sure, and a legal-limit CB will do fine, but for typical ham base or mobile units you'll have to dial back the power.

Next up, the USB-A problem.  OK, it only has USB-A ports.  Plug your phone's USB-C charger into one of the two AC ports just like you would at home and rock on.  Don't want to give up an AC socket?  Bring along an AC power strip and you'll have as many ports as you like.  But that's... one... more... thing.

Now, how bad is the problem with the inverter putting out radio frequency interference?  In my testing, an AM radio was unusable in about a 10 foot range around the device, while broadcast FM was unaffected.  It's not bad, but it is something to be aware of, especially if you're thinking of two-way radios.  Again, not bad, but it is there and it is a consideration.

Now for the maybe/maybe nots.  With only 200 watts output, you're not going to run a 1200 watt coffee maker or your kitchen refrigerator on this thing.  Could run the coffee grinder though, and then make your coffee on a camp stove.  And it will run many, many other useful things: a household LED floor lamp (10 watts), maybe a small TV (check its specs), a Dremel tool to sharpen a chainsaw, those sorts of low-draw things.  As for its total energy (146 watt-hours), you could run a couple of lamps all evening and charge a couple of phones (about 15 watt-hours) overnight.  A floor box fan pulls 40 watts on low, so only about 3+ hours there.  Of course, when the power's flowing in from the sun during the daytime and once the battery's charged, it's all free energy until sundown.  Just know the limits and do the math: 200 watts maximum output, 146 watt-hours total, in any combo you like.

Bottom line is this is a pretty nice little plug-and-play unit, with a few hiccups in its design: namely the USB-A only and 11.5vdc output issues.  Paired with its solar panel, it will keep a few lights on, the phones charged, and the coffee beans ground on a car camping trip or after a hurricane, all at a price that won't break the bank.  If any of the cons really bug you – or you just want something with better build quality or a name you recognize – there are lots of other options out there.