http://www.soldersmoke.com
In SolderSmoke 108:
May 24, 2009
Hubble Space Telescope Repair Mission
WSPR: W3PM sees my sigs, back to visual (briefly), on to Slow Hell.
Ubuntu ham radio software
Time nuts
Jean Shepherd gets his Class A license
"SolderSmoke -- The Book" Good for summer vacation reading.
SPECIAL REPORT FROM DAYTON - FDIM BY BOB W8SX
MAILBAG
CHECK OUT THE BOOK: (First chapter preview available)
http://www.lulu.com/content/paperback-book/soldersmoke/6743576
73 from Rome
Posts
An Unintended Post-Mortem
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Many of us wind up in a similar situation, I'm sure: we impulse buy at
hamfests—great plans for some big old currently non-working piece of
gear—and then...
1 hour ago
The house is quiet this morning, so let's listen to some Soldersoke.
ReplyDeleteHubble Space Telescope: That is certainly a fascinating instrument. I've noticed some books utilizing HST images in the shops these days, but I haven't collected any of them yet. At Oklahoma State I attended a lecture given one afternoon by a control systems engineer on the telescope. As you can expect the telescope heats and cools as it goes around the earth being exposed then shielded from the sun. This action can / could set up oscillations in the machine. I guess worst case that could obscure the viewing. I wish I had the details here.
WSPRGuys, regarding these WSPR rigs. What would a small / portable setup look like ? Would a WSPR box be feasible -- one that acted a lot like an APRS tracker on HF ? That would be something handy.
ReplyDeleteHas anyone ventured out of the shack with WSPR ?
73
Scott
KD5NJR
Time Nutshttp://www.wired.com/science/discoveries/news/2007/12/time_hackers
ReplyDeleteExcerptBELLEVUE, Washington -- Tom Van Baak's spare upstairs bedroom looks like a cross between the control center of a remote polar outpost and the inner sanctum of a Victorian mad scientist. In reality, it's a home-built lab dedicated to the study of time.
One wall is stacked with a small museum's worth of old nautical clocks, thin slabs of quartz, vacuum tubes of unknown purpose and a few metronomes. Another wall is dominated by shelves overflowing with metal boxes sporting dials, knobs, flashing LEDs and constantly shifting digital displays. A sealed metal cylinder resting on a paint-splattered stepladder bears the not-quite-reassuring sticker, "Cesium Device. Not Radioactive."