jul 25

RSGB IOTA Contest – 29th – 30th July 2017

The RSGB IOTA contest is one of the most important and exciting contests of the year. Since in this contest, the emphasis is on stations operating from islands, there are many operators that make short trips to one of the many available islands in any continent, including Europe.

To encourage the partecipation, the RSGB has released a very simple guide aimed at newcomers, where it is explained, step by step, how to enter a contest, to manage QSO’s and even to build your own dipole (normal or inverted V)!

This guide is found at http://www.rsgbcc.org/hf/iotahelp.shtml.

Here are the details:

the contest period is from 1200 UTC Saturday to 1200 UTC Sunday.

Bands/modes: 3.5, 7, 14, 21 and 28MHz, CW and SSB.

Categories:

Single Op 12 hrs (Island/World | CW/SSB/Mixed | QRP/Low/High)

Single Op 24 hrs (Island/World | CW/SSB/Mixed | QRP/Low/High)

Single Op Assisted 12 hrs (Island/World | CW/SSB/Mixed | QRP/Low/High)

Single Op Assisted 24 hrs (Island/World | CW/SSB/Mixed | QRP/Low/High)

Multi-Op Island (QRP/Low/High)

New category introduced in 2016: Multi-Two Island (QRP/Low/High)

Scoring:

All entrants can contact anyone, Island Stations or World Stations.

  Island Stations contacting
World Stations: 5 points.
Island Stations having the same IOTA reference (for example EU-005 contacts EU-005): 5 points.
Other Island Stations: 15 points.

World Stations contacting
World Stations: 2 points.
Island Stations: 15 points.

The multiplier is the total of different IOTA references contacted on each band on CW, plus the total of different IOTA references contacted on each band on SSB.

Entries must be emailed to iota.logs@rsgbcc.org no later than August 7.

Rules are found @  www.rsgbcc.org/hf/rules/2016/riota.shtml.

You may also want to check a large list of stations

which announced their partecipation @

www.ng3k.com/Misc/iota2016.html.

jul 24

WSJT-X Version 1.8.0-rc1 – New FT-8 DigiMode – Ham Radio for the Fast & Furious

WSJT-X Version 1.8.0 includes a new mode called FT8,

developed by K9AN and K1JT

 

Brief Description of the FT8 Protocol
————————————-

WSJT-X Version 1.8.0 includes a new mode called FT8, developed by K9AN
and K1JT. The mode name “FT8” stands for “Franke and Taylor, 8-FSK
modulation”. FT8 uses 15-second T/R sequences, provides 50% or
better decoding probability down to -20 dB on an AWGN channel, and
maintains good performance on Doppler-spread fading channels. An
auto-sequencing facility includes an option to respond automatically
to the first decoded reply to your CQ. FT8 QSOs are 4 times faster
than those made with JT65 or JT9. FT8 is an excellent mode for HF
DXing and for situations like multi-hop E_s on 6 meters, where deep
QSB may make fast and reliable completion of QSOs desirable.

Some important characteristics of FT8:

– T/R sequence length: 15 s
– Message length: 75 bits + 12-bit CRC
– FEC code: LDPC(174,87)
– Modulation: 8-FSK, tone spacing 6.25 Hz
– Constant-envelope waveform
– Occupied bandwidth: 50 Hz
– Synchronization: 7×7 Costas arrays at start, middle, and end
– Transmission duration: 79*1920/12000 = 12.64 s
– Decoding threshold: -20 dB; several dB lower with AP decoding
– Multi-decoder finds and decodes all FT8 signals in passband
– Optional auto-sequencing and auto-reply to a CQ response
– Operational behavior similar to JT9, JT65

We plan to implement signal subtraction, two-pass decoding, and use of
a priori (AP) information in the decoder. These features are not yet
activated in v1.8.0.

We haven’t yet finalized what the three extra bits in the message
payload will be used for. Suggestions are welcome!

 Joe, K1JT, for the WSJT Development Team

jul 17

Z81D – South Sudan

 

Diya, YI1DZ

is again active from

Juba, South Sudan

as

Z81D

Activity on HF bands, SSB.

Length of stay unknown.

Diya was last active from South Sudan in April 2016.

QSL via OM3JW.

jun 30

D2FJZ – Angola

Paulo, CT1FJZ

is again qrv from

Luanda, Angola

as

D2FJZ.

QRV on 20m SSB. Length of stay unknown.

QSL via Home Call

 

jun 29

3W3B – VIETNAM

 

XW1B

will be active again from

Vietnam 3 – 14 July 2017

as

3W3B

 

He will operate on 40 – 10m CW, RTTY, JT65 and hopefully also 6m

QSL via E21EIC, LOTW.

Ads for direct QSL:

CHAMP C. MUANGAMPHUN,

P.O.BOX 1090 KASETSART UNIVERSITY,

BANGKOK 10903,

Thailand.

jun 29

XW4XR – LAOS

Bruce, 3W3B

will be active again

from

Laos

3 – 14 July 2017

as

XW4XR

He will operate on 40 – 10m

CW, RTTY, JT65 and hopefuly 6m

QSL via E21EIC, LOTW.

jun 29

9U4M – BURUNDI

The MDXC team led by Antonio IZ8CCW and
co-leader Gabriele I2VGW
will conduct their next DXpedition
as
9U4M
between  6/11 and 17/11/2017
QRV with 5 stations
using all band / all modes
QSL via IK2VUC direct or bureau
LoTW, logsearch and OQRS on this website:

jun 29

FO/KV1J – Miquelon Island (IOTA NA-032)

Eric, KV1J

will be active again from

Miquelon Island (IOTA NA-032)

4 – 18 July 2017

as

FP/KV1J

He will operate on 160 – 10m SSB, RTTY, CW.

He is planning activity in:

BARTG RTTY, Russian DX and WPX SSB Contests.

QSL via home call, LOTW

jun 29

A25 – BOTSWANA

Pavel R2AD, Yuri RM0F and Elena RC5A

will be active from Kasane,

Botswana

as

A25BE, A25BI & A25SP

respectively during September 15-25, 2017.

QRV on 160-6m CW/SSB.

QSL via individual homecalls

OQRS/Club Log/LoTW.

mei 19

Z25DX – ZIMBABWE

Tom, KC0W

will be active from

Zimbabwe

as

Z25DX

between 23 May  to 18 June  

QRV on 80-6m, CW.

QSL via HomeCall

This is the first time a Z25 prefix has been issued.

Oudere berichten «

» Nieuwere berichten

Copyrighted Image

error: No Way Protected !!