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CAS-7A — Chinese HF Satellite
· HFTagged , · admin

CAMSAT has announced in spring 2020 the launch of CAS-7A for 15.09.2020. The project was announced several years ago, but has been postponed again and again.

The special thing about CAS-7A is that HF is used with two transponders. The transponder configuration of the Chinese satellites is similar to that of the Russian RS satellites of that time. A sun-synchronous orbit with an inclination of 98° is planned. The orbit height shall be 500 km. The transponders have a bandwidth of 30 kHz and the frequencies were coordinated by IARU [1]:

HF linear transponder:

uplink: 21.245 — 21.275 kHz
Downlink: 29,435 — 21,465 kHz
CW beacon: 29.425 kHz

HF/UHF transponder:

Uplink: 21.3125 — 21.3275 kHz
Downlink: 435,3575 — 435,3725 kHZ
CW beacon: 435.430 kHz

[1] http://​www​.amsatuk​.me​.uk/​i​a​r​u​/​f​i​n​i​s​h​e​d​_​d​e​t​a​i​l​.​p​h​p​?​s​e​r​i​a​l​n​u​m​=​658

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HF Digital Mode Band Plan Review
· HF · admin

“The explosive growth in HF digital modes, particularly FT8, has led to perceived overcrowding of HF digital mode band segments. Accordingly, a working group has been formed consisting of representatives of the three regional band planning committees. This is the first time the three Regions have joined together to directly coordinate band planning efforts…”. See more at https://​www​.iaru​.org/​2​0​2​0​/​h​f​-​d​i​g​i​t​a​l​-​m​o​d​e​-​b​a​n​d​-​p​l​a​n​-​r​e​v​i​ew/

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IARU HF World Championship
· Events, HF, IARU · admin

July 11 – 12, 2020

– The HF World Championship is an annual event to support amateur self-training in radiocommunications including improving amateur operating skills, conducting technical investigations, and intercommunicating with other amateurs around the world, especially IARU member society headquarters stations, using the 160, 80, 40, 20, 15 and 10-meter bands.

More information: http://​www​.arrl​.org/​i​a​r​u​-​h​f​-​w​o​r​l​d​-​c​h​a​m​p​i​o​n​s​hip

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Chinese Satellite with HF Transponder
· HF · admin

Two new Chinese CAMSAT amateur radio satellites, CAS-7A and CAS-7C, are scheduled for launch on September 15. CAS-7A is a 27 kg microsat with a transponder for 15 m / 10 m and other features. The frequencies were planned in cooperation with IARU. In H/T mode the uplink is in the range of 2̶1̶ ̶2̶4̶5̶ ̶t̶o̶ ̶2̶1̶ ̶2̶7̶5̶ ̶k̶H̶z 21 395 to 21 425 kHz and the downlink in the range of 29 435 to 29 465 kHz. The CW beacon transmits on 29 425 kHz. [more]

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UK 5 MHz beacon to close
· HF · admin

It has been announced that the 5 MHz (60m) beacon GB3WES at Westmorland IO84qn on 5.290 MHz will close down on March 11, 2020, when its Notice of Variation (NoV) expires.

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