• Tuning up a tube-type amplifier properly

    Updated: 2010-04-30 08:23:49
    Technical Reference/AmplifiersThis guide is primarily written for those who are new to HF tube-type amps, or anyone who wishes to get the most out a Linear amplifier.

  • A homebrew UHF Dummy Load

    Updated: 2010-04-30 08:23:49
    Technical Reference/Dummy LoadsA homebrew dummy load is usually a combination of several parallel carbon resistors, in order to be able a final resistance of 50 Ohms.

  • HF power amplifier using GI7B

    Updated: 2010-04-30 08:23:49
    Technical Reference/Amplifiers/HF AmplifiersGi7b is tube designed for microwaves but working good as HF amplifier. Idea is to build cheap, reliable HF amplifier covering 160 meters band.

  • S79BWW Seychelles 2010

    Updated: 2010-04-30 08:23:49
    DX Resources/DX Peditions/2010 DXpeditionsSouth east africa indian ocean Amateur Radio adventure Seychelles 2010 m July 17 th until July 31th by ct1bww

  • Radio London Ltd

    Updated: 2010-04-30 08:23:49
    Shortwave Radio/Broadcasters/Offshore RadiosThis site, run by Radio London Ltd, is dedicated to Radio London -Big L (1964 - 67), the Big L Fab 40 charts, 60s Offshore Radio and Music.

  • PA1RBZ DX Cluster

    Updated: 2010-04-30 08:23:49
    DX Resources/ClustersTelnet DX-Cluster pa1rbz.dyndns.org on port 9000

  • Spectrogram for iPhone

    Updated: 2010-04-30 08:23:49
    Software/Spectrum analyzersSpectrogram for iPhone displays a live, scrolling display of sound frequency components derived from a 1024 FFT analysis.

  • M6CEB UK Amateur Radio Station

    Updated: 2010-04-30 08:23:49
    Ham Radio/Blogs/Europe/UKUK Amateur Radio station interested in radio.

  • Arecibo telescope tracks potentially dangerous asteroid within 1.5 million miles of Earth

    Updated: 2010-04-30 00:13:11
    Radar imaging of asteroid 2005 YU55 showed that the asteroid is about 1,300 feet (400 meters) in size and about twice as large as previously estimated.

  • Ice lurks in asteroid's cold heart

    Updated: 2010-04-30 00:13:10
    Scientists say the discovery of water-ice is a result of 6 years of observing asteroid 24 Themis.

  • Answer to Universe Puzzle No. 11 Now Posted

    Updated: 2010-04-29 16:12:34
    I've now posted the answer in the original post. Check back next week for another Universe Puzzle!© Jean Tate for Universe Today, 2010. | Permalink | No comment | Add to del.icio.usPost tags:Feed enhanced by Better Feed from Ozh

  • Eta Aquarid meteor shower peaks May 6

    Updated: 2010-04-29 00:11:45
    Debris from Halley's Comet gives birth to an impressive sky show during May's first week.

  • World's biggest telescope to be located on Cerro Armazones, Chile

    Updated: 2010-04-28 19:46:03
    The decision to build the telescope on Cerro Armazones was based on an extensive comparative meteorological investigation that lasted several years.

  • Satellite Captures Wall of Dust Moving Across Sahara

    Updated: 2010-04-28 19:45:59
    Wow — this looks HUGE from orbit — can you imagine standing out in the Sahara Desert and seeing this gigantic wall of dust heading right towards you? The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite observed this wall of dust on April 22, 2010 which spans hundreds of kilometers. See [...]

  • Planck highlights the complexity of star formation

    Updated: 2010-04-27 23:35:31
    Where optical telescopes see only black space, Planck's microwave eyes reveal myriad glowing structures of dust and gas.

  • Lunokhod 1 retroreflector found

    Updated: 2010-04-27 19:25:59
    The Lunar Reconnaissance Orbiter team helped scientists track laser signals to the Russian rover mirror.

  • "Data" Narrates Hubble Documentary

    Updated: 2010-04-27 07:15:50
    The Hubble Space Telescope is one of the greatest technological achievements in our history, and for two decades has astonished us with dynamic images of our solar system and the world beyond. To celebrate this important twenty-year milestone, NASA looks back at the contributions of this extraordinary scientific tool, and the scientists who created it, [...]

  • Research illuminates the shape of dark matter's distribution

    Updated: 2010-04-26 23:15:32
    A thorough examination of the shape of dark matter's distribution in the cosmos may open up a new way to explore the nature of this enigmatic matter.

  • M81's halo sheds light on galaxy formation

    Updated: 2010-04-26 23:15:32
    The most prominent of the galaxy formation models predicts that galaxies are built up from the merging and accretion of many smaller galaxies that orbit within their gravitational sphere of influence.

  • New Images from Planck Reveal Star Formation Processes

    Updated: 2010-04-26 19:05:57
    While most newborn stars are hidden beneath a blanket of gas and dust, the Planck space observatory – with its microwave eyes – can peer beneath that shroud to provide new insights into star formation. The latest images released by the Planck team bring to light two different star forming regions in the Milky [...]

  • GOODS, Under Astronomers' AEGIS, Produce GEMS

    Updated: 2010-04-26 06:55:55
    No, not really (but I got all three key words into the title in a way that sorta makes sense). Astronomers, like most scientists, just love acronyms; unfortunately, like most acronyms, on their own the ones astronomers use make no sense to non-astronomers. And sometimes not even when written in full: GOODS = Great Observatories Origins Deep Survey; [...]

  • Astronomy Without A Telescope – The Nice Way To Build A Solar System

    Updated: 2010-04-25 06:35:54
    When considering how the solar system formed, there are a number of problems with the idea of planets just blobbing together out of a rotating accretion disk. The Nice model (and OK, it’s pronounced ‘niece’ – as in the French city) offers a better solution.(...)Read the rest of Astronomy Without A Telescope – The Nice [...]

  • Hubble, Renewed, Reinvigorated, Raring to Go

    Updated: 2010-04-23 22:14:34
    Note: To celebrate the 20th anniversary of the Hubble Space Telescope, for ten days, Universe Today has featured highlights from two year slices of the life of the Hubble, focusing on its achievements as an astronomical observatory. Today's article looks at the last two years, to April 2010. The stakes for the fifth, and final, Hubble [...]

  • LUCIFER allows astronomers to watch stars being born

    Updated: 2010-04-23 18:05:00
    The new instrument on the Large Binocular Telescope is a powerful tool that will gain spectacular insights into the universe — from the Milky Way to extremely distant galaxies

  • Shock Waves, Volcanic Bombs From Eyjafjallajokull

    Updated: 2010-04-23 18:04:57
    The volcano in Iceland keeps producing eye-popping effects. Now that the ash isn't spewing quite so dramatically,the mouth of the volcano itself is visible. Here's close-up aerial footage of the crater at Eyjafjallajokull, with glowing red lava and shockwaves of the eruptions in the ash cloud. Incredible. If you haven't yet seen images [...]

  • Hubble's Birthday Gift to Us: Mystic Mountain

    Updated: 2010-04-23 18:04:56
    Happy 20th Birthday to the Hubble Space Telescope! While we should be showering HST with gifts, instead the telescope provides this present to us: an amazing view of what has been nicknamed "Mystic Mountain. " It is just a small portion of one of the largest known star-birth regions in the galaxy, [...]

  • Podcast: Rotation

    Updated: 2010-04-23 18:04:55
    Everything in the Universe is spinning. In fact, without this rotation, life on Earth wouldn't exist. We need the conservation of angular momentum to flatten out galaxies and solar systems, to make planets possible. Let's find out about the physics involved with everything that spins, and finally figure out the difference between centripetal and centrifugal [...]

  • Click on Hubble: Galaxy Zoo Now Includes HST Images

    Updated: 2010-04-23 05:55:00
    The Hubble Space Telescope is 20 years old on Saturday and, to mark this anniversary, all the world's space and astronomy fans have a chance to become part of the Hubble team. As part of the birthday celebrations NASA’s Space Telescope Science Institute and the online astronomy project Galaxy Zoo are making some 200,000 Hubble images [...]

  • Distant planet missing common ingredient

    Updated: 2010-04-22 21:54:39
    The Spitzer Space Telescope has discovered planet GJ 436B is methane-free.

  • New eye on the Sun delivers stunning first images

    Updated: 2010-04-22 17:44:58
    Images from the Solar Dynamics Observatory show never-before-seen detail and help scientists understand our Sun's dynamic processes.

  • VISTA captures celestial cat's hidden secrets

    Updated: 2010-04-21 21:34:39
    The view of NGC 6334 in the infrared is strikingly different from that in visible light. With the dust obscuring the view far less, scientists can learn more about how these stars form and develop in their first few million years of life.

  • Researchers study galaxy mergers

    Updated: 2010-04-21 21:34:38
    The largest galaxies in the universe are elliptical in shape, and how they formed is central to our understanding of how the universe has evolved over the past 15 billion years.

  • NAM2010

    Updated: 2010-04-12 17:58:47
    Astronomy Blog You are : in Astronomy Blog archive NAM2010 An astronomy blog usually but not always based in the UK . Pondering questions such as What is in an exoplanet name NAM2010 It is that time again the UK's National Astronomy Meeting 2010 I may or may not blog depending on how busy I get but I will certainly be tweeting along with many others using the hashtag NAM2010 We've already had a series of nice images of baby stars in the Rosette Nebula from Herschel a re-make of one shown on Rob's blog previously an animation of Saturn's aurorae taken in-situ by the Cassini spacecraft and an image of the GOODS-North field from Herschel . I couldn't find the last one online yet but you can keep up-to-date with Herschel's released images using the Online Showcase of Herschel Images Expect

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