Приложение для расчёта трансформаторов, применяемых в двухтактных источниках питания импульсного типа.
Программа Design tools pulse transformers с высокой степенью точности позволяет рассчитывать импульсные трансформаторы двухтактных полумостовых, мостовых, а также push-pull-ных преобразователей источников питания. Данное приложение было написано на базе оригинальных методик и является одним из лучших в своем роде. При расчете основную роль играют характеристики и геометрия магнитопровода. В отличие от универсальных калькуляторов-симуляторов (базирующихся, в том числе, и на SPICE) учитывается шаг намотки, глубина проникновения тока в проводник, число слоёв обмотки, количество жил в обмоточных проводах, толщина изоляции, скважность импульсов, потери на токи Фуко и на гистерезис в магнитопроводе.
IARU Participation in ITU-Radiocommunication Consultations Called “Mutually Beneficial”
International Amateur Radio Union (IARU) President Tim Ellam, VE6SH/G4HUA, has praised the value of the IARU’s participation over the years in International Telecommunication Union (ITU) International Radio Consultative Committee (CCIR) and ITU Radiocommunication Sector (ITU-R) study groups. CCIR was the forerunner to ITU-R. In an article, “The International Amateur Radio Union and CCIR/ITU–R” in the latest issue of ITU News Magazine(see page 55), Ellam said th
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Radio Amateurs in Colombia, Germany Get New or Expanded Bands
Radio amateurs in Colombia have been granted new allocations at 60, 630, and 2200 meters. The new allocations resulted from the efforts of the Liga Colombiana de Radioaficionados (LCRA) — with the support of its “strategic partner” Liga Radio Bogotá (LRB). Access to the new bands will be effective when the Colombian Communications Ministry grants the privileges by administrative act. The new allocations are 135.7-137.8 kHz (2200 meters); 472-479 kHz (630 meters); and 5,351.5-5,366.5 kHz (60 meters).
In Germany, radio amateurs there now have a 60-meter band plus an extended 6-meter band, the Deutscher Amateur Radio Club (DARC) rep
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SB DX @ ARL $ARLD046
ARLD046 DX news
ZCZC AE46
QST de W1AW
DX Bulletin 46 ARLD046
From ARRL Headquarters
Newington CT November 16, 2017
To all radio amateurs
SB DX ARL ARLD046
ARLD046 DX news
This week's bulletin was made possible with information provided by
AA3B, AJ9C, the OPDX Bulletin, 425 DX News, DXNL, Contest Corral
from QST and the ARRL Contest Calendar and WA7BNM web sites. Thanks
to all.
VIET NAM, 3W. Tom, KC0W is QRV as 3W9CW from Con Son Island, IOTA
AS-130, until November 28. QSL direct to home call.
MAURITANIA, 5T. Operators A92AA and A61M will be QRV as 5T1A and
5T1R, respectively, from Nouakchott from November 20 to December 20.
Activity will be on 40 to 10 meters using SSB and FT8. QSL via
operators' instructions.
GHANA, 9G. A group of operators will be QRV as 9G5W from Kokrobite
from
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Четверг, 21.11.2024, 10:56
ARLD046 DX news
ZCZC AE46
QST de W1AW
DX Bulletin 46 ARLD046
From ARRL Headquarters
Newington CT November 16, 2017
To all radio amateurs
SB DX ARL ARLD046
ARLD046 DX news
This week's bulletin was made possible with information provided by
AA3B, AJ9C, the OPDX Bulletin, 425 DX News, DXNL, Contest Corral
from QST and the ARRL Contest Calendar and WA7BNM web sites. Thanks
to all.
VIET NAM, 3W. Tom, KC0W is QRV as 3W9CW from Con Son Island, IOTA
AS-130, until November 28. QSL direct to home call.
MAURITANIA, 5T. Operators A92AA and A61M will be QRV as 5T1A and
5T1R, respectively, from Nouakchott from November 20 to December 20.
Activity will be on 40 to 10 meters using SSB and FT8. QSL via
operators' instructions.
GHANA, 9G. A group of operators will be QRV as 9G5W from Kokrobite
from
