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Tag: magic
EM De-Embedding Magic Part 4: Internal Ports
2014-12-12 10:56:16| rfglobalnet Downloads
When I was just old enough to find out that one should not try to catch a falling soldering iron, I was having a lot of fun building amplifiers and oscillators for amateur radio, a hobby introduced to me by my father. Back then, nearly everything was tubes. I remember working on the final amplifier of our “homebrew” transmitter, a pair of 807’s in push-pull. To make the amplifier stable, I first turned off the input power by pulling the driver tube, a 6L6, and the oscillator, a 6AG7. Being very careful of the 600 V on the plates (at the plate caps, on the top of the tubes, Figure 1), I would adjust a wire connected to the input (connected to the tube pins underneath the chassis, passing through a small hole in the steel chassis) until there was zero RF output, as measured by a light bulb acting as a dummy load. The negative feedback at high frequency neutralized the amplifier.
Tags: part
internal
magic
ports
Geoengineering Doesnt Provide Magic Bullet Global Warming
2014-11-26 08:04:00| Climate Ark Climate Change & Global Warming Newsfeed
Bloomberg: Geoengineering, which includes spraying sea salt or sulphate aerosols into the atmosphere to reflect sunlight, wont provide a magic bullet to combat climate change, a University of Oxford study shows. Its too soon to judge the costs and benefits of these concepts, Steve Rayner, the James Martin Professor of Science and Civilization at Oxford, said today in a statement issued jointly with the universities of Leeds and Bristol. The cost estimates for major projects are unrealistic, he said,...
Tags: provide
global
magic
warming
The magic of the Holiday Express train
2014-11-25 00:20:36| PortlandOnline
Start off the holiday season with an adventure on board a holiday train!
Tags: express
holiday
magic
train
Toledo holiday magic recaptured
2014-11-16 15:05:23| Agriculture - Topix.net
The Andersons' Paula Larsen, with microphone, leads the crowd in two rounds of Tiedtke's theme song. With her near the giant cheddar are Evelyn Sandrock, who was photographed sitting on the giant cheese wheel at Tiedtke's; John Hoover, marketing and business development director for The Andersons; Dick Anderson, chairman emeritus of The Andersons board, and John Robinson Block, publisher and editor-in-chief of The Blade.
Tags: holiday
magic
toledo
recaptured
The 'Side Show' stars reveal how the magic is done
2014-11-13 19:53:15| Food - Topix.net
In this image released by The O and M Company, Emily Padgett, left, and Erin Davie during a performance of "Side Show," at the St. James Theatre in New York.
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