YK
вроде Олег R1CBU (но могло тоже присниться)
по qrp журналу, Полякова интересно читать и сейчас
например, узнал новое про
"узкополосный (2Fc) упрощенный (двухфазный) синхронный фильтр с центральной частотой на частоте гетеродина"
Size: a a a
2021 December 10
V
V
а главное доступно и понятно объясняется
IM
Переслано от Inga Muste YL3IM
ICOM announces development of 2.4 and 5.6 GHz amateur radio equipment
Icom Co., Ltd. (Headquarters: Hirano-ku, Osaka, President: Hiroshi Nakaoka) is working on new projects by utilizing the wireless communication technology cultivated for more than half a century and the creativity to produce things from scratch. Was started.
Under the theme of "ICOM SHF Project-Challenge to SHF band-", we started to develop amateur radios compatible with 2.4GHz and 5.6GHz bands.
Icom engineers are working together to research and develop a number of challenges due to the SHF band, such as heavy cable loss and the required high-dimensional frequency stability. Finally, we aim to bring it to the market as a product.
Icom imagines to make the SHF band, which used to have high equipment and technical hurdles, into a band that anyone can easily operate, and to show new fun and possibilities of amateur radio. We are developing an epoch-making amateur radio that supports the SHF band that was not available.
Please look forward to new challenges from Icom, such as what kind of ideas and technologies will be introduced, what kind of functions and designs will be used.
https://www.icom.co.jp/lp/shf/
Icom Co., Ltd. (Headquarters: Hirano-ku, Osaka, President: Hiroshi Nakaoka) is working on new projects by utilizing the wireless communication technology cultivated for more than half a century and the creativity to produce things from scratch. Was started.
Under the theme of "ICOM SHF Project-Challenge to SHF band-", we started to develop amateur radios compatible with 2.4GHz and 5.6GHz bands.
Icom engineers are working together to research and develop a number of challenges due to the SHF band, such as heavy cable loss and the required high-dimensional frequency stability. Finally, we aim to bring it to the market as a product.
Icom imagines to make the SHF band, which used to have high equipment and technical hurdles, into a band that anyone can easily operate, and to show new fun and possibilities of amateur radio. We are developing an epoch-making amateur radio that supports the SHF band that was not available.
Please look forward to new challenges from Icom, such as what kind of ideas and technologies will be introduced, what kind of functions and designs will be used.
https://www.icom.co.jp/lp/shf/
AH
Ребят, кто поможет опознать что это за фильтр?
2021 December 11
AA
AA
3D-сканеры vs фотограмметрия
2021 December 12
YK
@afiskon
Недавно листал Гончаренко и что нашел :-),😱
Недавно листал Гончаренко и что нашел :-),😱
AA
да это и на сайте есть
YK
Ну я думал в книге вообще не упоминается
AS
Там все основные мифы упоминаются. :) Книга большая и содержит разное. :))))
2021 December 16
AH
Нужна помощь коллективного разума. Никак не соображу почему у этой антенны радиалы по 20м всего, хотя антенна на 160.
AH
AS
Радиалы представляют собой ёмкостную нагрузку скорее всего.
AS
Но вообще я бы промоделировал. Можно в модели поменять длину радиалов и посмотреть на мнимую часть сопротивления.
AH
Я про противовесы по земле.