Archive for month: March, 2009

Updated WSPR Map

March 30, 2009 | General | By: Mark VandeWettering

I’ve gotten a couple of additional sporadic spots from DX locations, so I thought I’d update my WSPR map again. This shows my reception from the Russian station RA6AS, Canadian VE1VDM (of Big Ears fame, and my most distant North American spot) as well as the LITCHFIELD station in Northern Australia. I’m still at 37 […]

Funny, but somewhat uncourteous image on 30m

March 29, 2009 | Amateur Radio | By: Mark VandeWettering

I was scanning back through my log of all the pictures from my QRSS grabber over the past few days, and found this rather funny image in its midst: It wasn’t particularly courteous to take up the entire band, but as near as I can tell, the transmission didn’t repeat, so it wasn’t all that […]

Computing the Square Root of Two

March 27, 2009 | General | By: Mark VandeWettering

I was dusting off some of my old code for computing pi to many decimal places, and was reminded that I’d never written similar code for computing a more basic value: the square root of two. The usual way to do this would be to use Newton’s iteration to solve x2 – 2 = 0. […]

Nifty kits from K5BCQ

March 25, 2009 | Amateur Radio | By: Mark VandeWettering

In the comments to one of my postings about the K1EL, Tom, K9AC mentioned that I might want to look at K5BCQ’s list of kits. Indeed, they seem really cool, and very reasonably priced. I am particularly interested in their Si570 controller, and their Morse controller, but there are lots of other nifty little gadgets […]

NavSpaSur Lunar Imaging by DF6NM

March 25, 2009 | Amateur Radio, Astronomy, Link of the Day | By: Mark VandeWettering

While recovering from my brief outpatient procedure yesterday, I was surfing around, looking for the ChirpHell and ChirpPix programs that some people mentioned in the context of creating the Hellschreiber IDs that I saw yesterday. A bit of Googling revealed that they were written by DF6NM, so I did some more websearching, and as soon […]

Some nice signals this evening…

March 24, 2009 | General | By: Mark VandeWettering



March 24, 2009 | General | By: Mark VandeWettering

For all my close friends who I’ve chatted with about today’s adventure: I’m home, and doing fine. But seriously, ouch.

Feature Column from the AMS

March 24, 2009 | Math | By: Mark VandeWettering

I’ve been using StumbleUpon to find new webpages on a variety of subjects when I am bored, and as you might have seen from other blog postings (although not so many recently), mathematics is one of those things that I actually find kind of interesting to think about. While scanning around this morning, I found […]


March 23, 2009 | Math | By: Mark VandeWettering

Suppose you wanted to format a nifty math equation for insertion into plain old ordinary email, or maybe as a comment in your C program. For instance, something reasonably complex like this rendition of the series used in the BBP algorithm to compute hexidecimal digits of pi: oo ===== __ \ / 4 2 1 […]

TEST appears on 30m…

March 22, 2009 | Amateur Radio | By: Mark VandeWettering

Reveal yourself! 🙂 Addendum: Voila! And I’m not the only one listening!

More WSPR/MEPT developments…

March 22, 2009 | Amateur Radio | By: Mark VandeWettering

This morning I was scanning my WSPR logs and my MEPT screenshots for the night. It seemed to be pretty good. I had quite a number of spots into Australia overnight: both from VK6DI (who is nearing the end of his time in VK6 land, we hope to see you again back on the eastern […]

Too much caffeine == shaky soldering

March 21, 2009 | General | By: Mark VandeWettering

I’m glad I didn’t try my hand at my second Softrock today. Instead, I decided to wire up all the programmable message buttons on my K1EL keyer (I had mounted them, but didn’t bother connecting them the last time I hooked them up). Man, my hands were jittery, I guess those two Diet Cokes really […]

Genius! Extreme Sheep LED Art

March 21, 2009 | Link of the Day | By: Mark VandeWettering


X Prize? How about the N-Prize?

March 19, 2009 | Amateur Satellite | By: Mark VandeWettering

The Official Site for the N-Prize The N-Prize offers two cash Prizes, each of £9,999.99 (nine thousand, nine hundred and ninety-nine pounds and ninety-nine pence, sterling). The prizes will be awarded to the first persons or groups to put into orbit around the Earth a satellite with a mass of between 9.99 and 19.99 grams, […]

Signals crossing the Mighty Pacific…

March 17, 2009 | Amateur Radio | By: Mark VandeWettering

David, VK6DI has his grabber running, and WB3ANQ, WA5DJJ and even NM5DV can be made out in not only my grabber, but in his as well.