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EM De-Embedding Magic Part 4: Internal Ports
2014-12-12 10:56:16| rfglobalnet Home Page
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.
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internal
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ports
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.
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internal
magic
ports
DevOps - The Future of Application Lifecycle Automation / Part 4 of 4
2014-12-12 09:00:00| Capgemini News Feed
Gunnar Menzel, VP Enterprise Architect Language Worldwide Share: Share this page
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future
application
Think Different: Best of 2014, Part 2
2014-12-11 17:54:00| Corn & Soybean Digest
In this second installment of our best stories from 2014, farmers showcase drainage systems that also irrigate, along with high-yield corn production tips. Read how tillage increases compaction, and plan for a micronutrient strategy. There are conservation ideas to help farmers be competitive, as well as thoughts on soil lime. All of these stories offered farmers an approach to help them Think Different about their farm operations. read more
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Review of the Year 2014 - Part III: Soft Drinks
2014-12-10 17:47:00| Daily beverage news and comment - from just-drinks.com
It's that time of year when just-drinks takes a look back at the past 12 months. Here, in part three of our final management briefing of the year, Andy Morton, takes a look at the major soft drinks stories of 2014.
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