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425 DX News 2020-28

URC News - dim, 05/07/2020 - 16:00
425 DX news est à consulter directement sur le site de 425 DX News

BY70-2, satèl·lit amb transponedor FM – Codec2

Radioaficionats.CAT - dim, 05/07/2020 - 15:46

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El passat 3 de juliol es va enlairar i posar en òrbita de del centre de llançaments xinès de Taiyuan, el satèl·lit BY70-2. Aquest satèl·lit substitueix el seu successor, BY70-1, un cubesat 2U que degut a un problema en el llançament va quedar en una òrbita el·líptica amb perigeu molt baix i es va cremar en la reentrada el febrer de 2017.

El BY70-2 és un cubesat 2U amb propòsit educacional posicionat en una òrbita a 500 Km d’alçada. Du una càmera miniatura per a captar imatges del planeta. També un transponedor amb entrada en FM a 145.920 MHz subto 67Hz  i sortida en mode digital Codec 2 per 436.200 MHz. Funciona de manera similar a d’altres ginys com  LO-90  o el Taurus-1.

Codec 2 és un mode de veu digital de codi obert. Està dissenyat per bitrate entre 700 y 3200 bps. Està implementat per exemple en el software FreeDV àmpliament usat en HF  SSB. El software sol acumular uns quants paquets abans de ser descodificats el que implica un retard d’uns 200 mSec. EA4GPZ, Daniel Estévez, va implementar una versió sense retard.
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Font: AMSAT, EA4GPZ
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Si t’ha agradat llegir aquesta notícia, associa’t a URCAT, l’Associació Nacional dels Radioaficionats Catalans.
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Catégories: ca

DX de la semaine 2020-28

URC News - dim, 05/07/2020 - 11:00
A voir sur le site AT communication Date Participants Lieu Jusqu’en septembre V6TOPG2020 Federated States of Micronesia Jusqu’en decembre 5H4WZ Pemba Island, IOTA AF – 063 Jusque janvier 2021 8J1R Showa Research Station, Queen Maud Land, IOTA AN – 015 27/06 au 04/07 JW7QIA Svalbard Islands,IOTA EU – 063 7 au 30 OX3LX Aasiaat Island, […]

QSO Today Amateur Radio Podcast Carl Luetzelschwab - K9LA

SARC - dim, 05/07/2020 - 09:45
While I am busy working with my team on the QSO Today Virtual Ham Expo, I am reprising some older episodes of guests who will appear as speakers in the Expo
Catégories: en

Ham College 66

SARC - dim, 05/07/2020 - 09:45
Extra Class Exam Questions – Part 4 E1D – Amateur space and Earth stations; telemetry and telecommand rules; identification of balloon transmissions; one-way communications
Catégories: en

AMSAT responds to allegations of unauthorized legal expenses

SARC - dim, 05/07/2020 - 09:45
The Radio Amateur Satellite Corporation (AMSAT) has been made aware of public comments alleging financial mismanagement in the form of “unauthorized” legal expenditures. AMSAT takes these allegations very seriously and in full disclosure, has investigated these claims for many months
Catégories: en

'Clubs as Hubs' plan designed to revive UK amateur radio

SARC - dim, 05/07/2020 - 09:45
Australia's WIA News carries a report by Jeremy Boot G4NJH on the 'Clubs as Hubs' plan designed to revive UK amateur radio
Catégories: en

Statement: Listed Events – Cricket Test Matches played in England 2020-2024

SARC - dim, 05/07/2020 - 09:45
Ofcom has granted Sky’s request to broadcast exclusive live coverage of cricket test matches played in England between 2020 and 2024
Catégories: en

ARISS Multi-point Telebridge Contact with school in Belgium

SARC - dim, 05/07/2020 - 09:45
UPDATE - An ARISS educational school contact is planned for Chris Cassidy KF5KDR with students at Don Bosco Haacht Technisch en Beroepsonderwijs, Haacht, Belgium
Catégories: en

ICASA extends the grace period for amateur radio licence renewals

SARC - dim, 05/07/2020 - 09:45
Following discussions, ICASA has informed the SARL that no amateur radio licenses expired on 30 June 2020. The grace period has been extended by several weeks to allow payment
Catégories: en

Foundations of Amateur Radio

SARC - dim, 05/07/2020 - 09:45
Every week I run a net for new and returning amateurs. A variety of people join in with varying degrees of skill, knowledge and number of birthdays
Catégories: en

5000 km plus opening on 144 MHz from Cape Verde Islands to Europe - 2nd July 2020

SARC - dim, 05/07/2020 - 09:45
The D4VHF station on Cape Verde Islands off the west coast of Africa had another remarkable opening to Europe on 144 MHz on Thursday the 2nd of July 2020. Using the FT8 digital mode, they worked at 20 stations on 2-metres in Italy (11), Slovenia (2) and Croatia (7)
Catégories: en

ARISS Multi-point Telebridge Contact with school in Belgium

SARC - dim, 05/07/2020 - 09:45
An ARISS educational school contact is planned for Chris Cassidy KF5KDR with students at Don Bosco Haacht Technisch en Beroepsonderwijs, Haacht, Belgium
Catégories: en

National Hurricane Center’s WX4NHC annual station test is successful

SARC - dim, 05/07/2020 - 09:45
On May 30, operators at WX4NHC at the National Hurricane Center (NHC), working from home, conducted the annual readiness check of the station and of other amateur radio stations and operators around the country and world. WX4NHC is marking its 40th year of public service in 2020
Catégories: en

Monthly performance of 8J17CALL for May-June, 2020

SARC - dim, 05/07/2020 - 09:45
Please be advised that monthly performance of 8J17CALL, 7-CALL 30th Anniversary Special station for May-June, 2020 (23rd May to 22nd June, 2020) are as follows; Monthly result in this period is 2,172 QSOs including 197 DX QSOs
Catégories: en

Bright morning Comet alert

SARC - dim, 05/07/2020 - 09:45
Today, Comet NEOWISE (C/2020 F3) is passing by the sun near the orbit of Mercury--and it seems to be thriving
Catégories: en

VK6WIA NewsWest

SARC - dim, 05/07/2020 - 09:45
NewsWest for Sunday 5th July 2020 is the New Amateurs Editon, where we welcome New Amateurs, recognising and supporting those who have joined the hobby
Catégories: en

RSGB ham radio exams on Greatest Hits Radio

SARC - dim, 05/07/2020 - 09:45
The RSGB reports the remotely invigilated online amateur radio exams got a brief mention on the Andy Crane show on Greatest Hits Radio
Catégories: en

Big radio switch-off is delayed until 2032

SARC - dim, 05/07/2020 - 09:45
Big radio switch-off is delayed again: AM and FM stations will be available on old devices for another decade as switchover from analogue to digital is put off until 2032
Catégories: en

Bulletin F8URC 2020-27

URC News - sam, 04/07/2020 - 11:00
Le bulletin est envoyé avec l’adresse « envoi-f8urc (at) urc.asso.fr » Pour les inscrits, n’oubliez pas de valider cet email comme non spam. Télécharger le bulletin :   Bulletin F8URC 2020-27 Copyright secured by Digiprove © 2020
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