Robert Yff, age 77, a longtime Norwalk resident, died Sunday October 19, 2008 of injuries sustained from a fall at the summer home he built on Fire Island. Born in Venezuela of Dutch parents on January 22, 1931, he was the son of the late Johannes Yff and Sophia Magdalena Korlaar Yff. Robert was the husband of Mary Margaret "Peggy"Girard Yff. He was pre-deceased by his first … [Read more...]
German Study: Living Near Powerful Transmitters Does Not Increase Childhood Leukemia Risk
Scientists from Johannes Gutenberg-University of Mainz have released the results of a study that indicates that children living in the vicinity of powerful radio and television transmitters are not significantly more at risk than others for developing childhood leukemia. Study results can be found in the “Epidemiological Study on Childhood Cancer and Proximity to Radio and … [Read more...]
Brochure Details State-of-the-Art Antennas for EMI/RFI Testing
A new brochure just released by AR RF / Microwave Instrumentation details the firm’s comprehensive line of antennas for EMI/RFI testing. These antennas are power and frequency matched to the firm’s amplifiers (1 to 15,000 W / 10 kHz to 50 GHz). Brochure content includes detailed information and specifications on log periodic, high gain RF horns, microwave horns, E-field … [Read more...]
New X2 EMI Suppression Film Capacitors Feature Increased Voltage Rating
The new MKP 339 X2, MKP 338 2 X2, and MKP 336 2 X2 from Vishay Intertechnology are X2 EMI suppression film capacitors with an increased maximum mains voltage of 310 VAC and a wide range of lead pitches and capacitance values. These devices differ from conventional EMI suppression capacitors that offer a typical voltage range of 275 VAC to 305 VAC. They offer designers an … [Read more...]
Horn Antenna for Radiated Immunity and Emissions Testing
The HRN-0118 Horn Antenna from TDK RF Solutions is a wide-band, double-ridged horn used to transmit and receive microwave signals over the frequency range of 1 GHz to 18 GHz The HRN-0118 generates the high electric fields required for radiated immunity and emissions measurements and features high gain, low VSWR (<5:1 average), and moderate power handling (300 watts). A … [Read more...]
Meeting Military Requirements for EMC and Transient Voltage Spike Suppression
The basics of EMI and transient compliance for military systems using SMPSs are covered. Dr. Glenn Skutt, VPT, Inc., Blacksburg, Virginia, USA THE EMI AND VOLTAGE TRANSIENT CHALLENGE Military and aerospace engineers face several challenges with respect to electromagnetic interference (EMI) and transient voltage compliance. The standards developed by the various military … [Read more...]
NTS Offers Expanded EMI Testing in Its NJ Laboratory
National Technical Systems has announced that its Tinton Falls, NJ laboratory is now equipped to offer high-level EMI testing for electronics and avionics. The lab’s new capability simulates high intensity radar sweeps encountered in hostile combat areas and in final approaches to civilian airports. The expansion includes the installation of a new shielded room, sophisticated … [Read more...]
Inrush Current in DC-DC Converters
Some applications may require limiting the inrush spike into the input capacitors. Steve Butler and Jeremy Ferrell, VPT, Inc., Blacksburg, Virginia, USA BACKGROUND Inrush current is the spike of current drawn by a power supply when it is turned on. A typical power system is shown in Figure 1. The input EMI filter will include some capacitance connected across the input … [Read more...]
Enhanced Test System Targets Emissions Testing from 9 kHz to 30 MHz
A newly released version of GAUSS Instruments’ “TDEMI” test systems carries out emissions testing from 9 kHz to 30 MHz. The original version, released earlier this year, handled the frequency range of 150 kHz to 1 GHz. With the new “TDEMI30M” a quasi-peak measurement in Band A or Band B can take as little as 12 seconds. The “TDEMI” measurement system from GAUSS Instruments … [Read more...]
CEO Jim McNerney
"Specific actions we are taking include streamlining organizational structures, reducing discretionary and capital spending, eliminating unnecessary work, and reviewing staffing levels, all to drive higher levels of productivity. Part of that, unfortunately, will mean reduced employment in certain areas of the company. We are targeting these reductions to exceed 6% of our … [Read more...]
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