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VK7AX > BCAST 06.08.23 04:26l 475 Lines 26862 Bytes #20 (0) @ WW
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VK7 Amateur Radio News 06Aug23
Text edition:
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VK7 AMATEUR RADIO NEWS BROADCAST
FOR SUNDAY 6th August 2023
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Welcome to the VK7 Amateur Radio News and this was first broadcast on Sunday the 6th August 2023. At the mike of VK7WI this week is Justin, VK7TW.
On Sunday this broadcast goes out on repeaters all over VK7 and on digital radio - DMR Talk Group 5 and D-Star Reflector 91C by VK3PG & VK7WP.
We go out on medium and high frequency courtesy of the following rebroadcast stations:
On 1.862 MHz by Graham, VK7GS,
On 3.670 MHz by Peter, VK7TPE,
On 7.140 MHz by Ross, VK7ALH,
On 14.130 MHz by Gary, VK7JGD and
On 28.525 MHz by Dale, VK7DG.
We also go out on UHF CB Channel 15 thanks to Mark VK7FMAC in the Hobart area.
You can hear this broadcast again on Tuesday night at 8:00pm on repeaters VK7RAA in Northern VK7 and VK7RHT in Southern VK7.
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RAOTC News
August Broadcast
Further to that mentioned on the WIA National News, this is another reminder about the RAOTC broadcast for Monday the 7th of August 2023 at 8 pm local time; thats tomorrow night for those listening on Sunday.
The first article describes the development of the ‘Oboe bomb aiming system developed during WW2. Oboe coupled radar tracking with radio transponder technology. In addition to equipment aboard the aircraft, it employed 2 ground stations called ‘cat and mouse.
The second article quotes from a recently released book; it describes how a clandestine radio receiver was made from scrounged and homemade components during WW2. This was accomplished by Norwegian detainee, Haakon Nilsen in Tatura, Victoria; it enabled European detainees to hear news of the war in Europe and the Pacific.
Listen at 8 pm Monday, local time, over the VK7RAA/VK7RHT state-wide network or at about 8:30pm as a telecast on VK7AX ‘Spectrum Tasmania via the BATC members stream or in the Ulverstone area on 445.50MHz DATV. Audio feed is available on VK7RDR, 439.775MHz, Dazzler Range.
The date again is August 7th. Call backs will follow on both networks. Please call in if you are able; this provides the RAOTC broadcast committee with an idea of how many are listening to these broadcasts.
If you miss the off-air broadcasts you can listen to the audio file on the RAOTC website:
https://www.raotc.org.au/
73, Peter, VK7PD
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QSL NEWS
Report - from Herman VK7HW Manager of the WIA VK7 Inwards QSL Bureau
The current list of cards held as at Friday 21 July is in the email version of the broadcast..
Herman would like to remind those who are sending cards to stations based in Tasmania that they should mail them to Herman based at South Arm (QTHR) instead of to the VK Outwards Bureau.
Herman has also found it handy when ops put the operators name of the station worked on the card.
Try it yourself, it may help an inwards QSL manager somewhere else. hihi.
If you have any questions re QSL cards, please contact Herman by email vk7bureau(at)wia.org.au
73, Herman, VK7HW, WIA Manager VK7 Inwards QSL Bureau
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Cards held at 21 July 2023
A, AAA, AAD, AAE, AAH, AAP, AAR, AB, AC, AD, ACE, ACG, ACN, ADE, AED, AG(2014), AGC, AHT, AIR, AJC, AKK, AL, ALH, ALZ, AM, AN, ANC, AO, AP, APZ, AR, AS, ATH, AU, AXZ, AY, AZ
BA, BB, BBB, BEN, BO, BPV, BT, BYE
C, CBR, CC, CJ, CL, CMV, CV, CW, CX
DC, DD, DIK, DM, DN, DO, DP, DQ, DW, DX, DY, DZ
EA, EG, EI, ER, EV
FADZ, FALX (alx), FAZZ, FCDW, FCIA, FLAR, FF, FG, FGGT, FPRN, FRJG(RG), FTAS
GA, GC, GGZ, GH, GM, GOP, GR, GS, GZ
HAM, HCH, HCK, HDM, HDX, HOB, HL, HPD, HRS, HSA, HSD, HSJ, HVK, HWW, HZ
IAN, ID, IK, IS
JA, JAZ, JB, JCR, JFD, JGD, JJ, JOK, JON, JP, JW
KA, KAC, KBA, KD, KDO, KI, KJ, KJL, KKR, KL, KO, KW
LCW, LDH, LH, LJ, LL, LLL, LM, LT, LVH, LW
MAG, MAT, MBD, MBP, MC, MD, MEL, MET, MHZ, MJ, MO, MOO, MR, MRS, MS
NA, NC, NEC, NET, NFI, NIK, NRF, NRT, NSE, NSS, NTE, NVH, NW, NWQ, NWT
OB, OR
PAF, PAL, PBD, PM, PRN, PSJ, PSZ, PW
QK, OR, OT
RB, RG/FRJG, RJ, ROY
SD, SN, STO, SV, SW, SZ
TCE, TED, TK, TL, TO, TS, TU, TUX, TX, TZ
UJ
VA, VAC, VAZ, VDC, VEK, VH, VIP, VR, VTM, VZ
WA, WC, WH, WL, WLH, WO, WT, WUU, WW, WX
XDM, XTC, XV, XX
YN, YUM
ZE, ZJJ, ZK, ZM, ZT, ZX
VI70MI, VI70HI(op DIANE)
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Statewide News
Thursday Night SSTV Nets
Another interesting net night that saw the following participants, VK7s – ZAB, EKA, PD and ZGK all sharing fifteen photos via the North South link. There was some noise on the link due to poor weather conditions on Mt Arthur.
There were various subjects like:
A series of photo of a mural in the main street of Lilydale, northern Tasmania. This outdoor café scene includes a cat and dog doing what comes naturally to them.
A series of photos of model railway dioramas including the one for “Puffing Billy”
A close encounter with a high speed train
The Potterage homestead
An RF Plummers delight
An historic series of photos of northern amateurs at a local café for their regular morning tea
A silver sphere with a smiley face and an optical illusion of an impossible cube frame
A reminder that Ken VK7KRJs and Steve VK7OOs fully automatic 24/7 monitoring sites allow anyone who has sent an SSTV picture the ability to check them on their pages almost immediately, any time, both South and North Tasmania.
Note: If you missed the net, there are archives of all SSTV nights. These photos can be seen on NTARCs website under blogs and arranged as weekly nets or on Kens 2m SSTV website as an infinitely-scrolling page. Also on Kens site are other interesting photos that have been sent between the net nights along with the current HF conditions report and weather radar map.
https://vk7oo.tasme.com/vhfsstv
https://sstv.vk7krj.com/scrolling%20web%20gallery.html
https://www.ntarc.net/blogs
73 from Andre VK7ZAB
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NEWS FROM THE NORTH WEST
NW Tassie Amateur Repeater Group Net
Due to issues with the 2m repeater on Mt Duncan, till further notice, the weekly Mt Duncan net on Wednesday nights, will be run on VK7RMD Mt Duncans 70cm repeater, 438.600 5 Mhz offset tone 141.3.
Regards & 73, Eric, VK7EV
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NEWS FROM THE NORTH
SOTA/WWFF PARKS GROUP
The Summits On The Air/World Wide Flora and Fauna parks group meets twice weekly – Mondays and Fridays 10.30AM till 12.00 at the Glebe Gardens Cafe, Henry Street, Launceston.
For more information contact Al on 0417 354 410.
73, Al, VK7AN
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Northern Tasmanian Amateur Radio Club Incorporated
www.ntarc.net
Last Saturdays Equine Endurance Ride at Lebrina from a technical point of view went “swimmingly”. Maybe thats a bad choice of adverb as the weather had other ideas and was not very forgiving, continuously changing and even varying drastically between Check Points throughout the day. A couple of Check Points were gumboots only and as for the wind gusts….. luckily the weight of the battery boxes managed to keep the awnings from departing the vehicles. The 80, 40 and 20 kilometre events all concluded safely even if quite a few riders were looking quite bedraggled by the finish. Many thanks to VK7s Andre ZAB and Stuart FEAT for looking after Ride Base and converting all the spoken words into legible text and Roger ARN, Maddy, Leon, Idris ZIR, Stuart ES, Fran and Stefan ZSB who were having all the fun at the Check Points. HiHi
Now a couple of left over items from the last club technical night.
Peter VK7KPC as well as bringing in his latest Traegar transceiver also provided a slide presentation of photographs from his previous few weeks of travel around Victoria. These were displayed on the large TV monitor for all to see and featured some of his tourist stop offs. Two notable sites were firstly the Royal Flying Doctors Service Museum at Broken Hill. This featured equipment like the1931 Traeger automatic Morse keyboard. This operated like a typewriter keyboard, by pressing one of the letter keys it activated strips of metal containing notches and indentations representing the dots and dashes of the Morse code to be sent. I suppose this relieved people of having to learn Morse code. Also a portable transceiver suitable for vehicle or horseback use and the iconic pedal powered generator manufactured by Traeger.
The second notable site was the Lake Boga Catalina Museum. Situated between Swan Hill and Kerang on the shores of Lake Boga. The museum is in commemoration to the service men and women who served at No.1 Flying Boat Repair Depot Lake Boga, Victoria from 1942 to 1947 and is the home of what looks to be a magnificently restored Catalina A24-30 flying boat. The museum also has the sites original secret communication bunker with communications equipment covering valve testers, Audio and Radio Frequency generators and alignment equipment. Even an ex-military American, left hand drive, Mobile radio jeep complete with anti-theft device mounted on the vehicle, notably a machine gun. Wouldnt be arguing with that little addition. With over 500 exhibits it is good to see a range of wartime treasures that have been preserved for future generations. These museums would certainly be an excellent addition to the itinerary when visiting Victoria next, thank you Peter.
Andre VK7ZAB, had a 600 W transmitter for the AM Broadcast Band, model FTX600 from SRK Electronics of Burwood Victoria. This unit is one of their many AM and FM transmitters and is also notable because they designed and manufactured from the component level up in Australia. Printed circuit boards and all products are assembled in-house. They are even environmentally compliance tested on site by their technicians.
Established in 1999, they have provided locally manufactured radio transmitters for hundreds of sites throughout Australia. This unit is rack mountable and is complimented with another rack unit featuring two independent 240 Volt power supplies, meant to be fed from two power circuits. Needless to say the covers “accidentally” fell off. The unit certainly was manufactured to a high standard and featured six mountable 100 Watt Power Output modules on the top side of the unit with provisions for another six on the underside making it the 1200 Watt model. The unit is microprocessor controlled and comes feature packed with loads of broadcast programmable and adjustable features like power out, modulation, compressor/limiter and independently programmable positive and negative peak limiting etc etc. Basically a very nice unit, even better to see it was designed and manufactured in Australia. Thank you Andre for this glimpse into the broadcast world.
Last broadcast I mentioned Andre used his Spectrum Analyser to bringing to our attention a new signal in the 206 MHz area. It was the ABC testing the new Digital Audio Broadcasting Plus service for the Launceston area, or DAB for short. Soon after hearing about the test broadcasts Phil VK7ZPD, was hot on the trail to track down any possible software capable of decoding the signal that could be run on a computer. His perseverance paid off and he came up with a programme called “wello.io”. It is suitable for a variety of operating systems and is an open source software programme for decoding DAB and DAB+ using a software defined radio (SDR). I have downloaded the latest version 2.4 which comes with an ‘Expert Mode”. This opens up all the interesting options for the service information displays. Anything from locational information and encoder method, sample rate and stream bit rate, service performance and error rates through to displays for Spectrum Analysis, Impulse Response, Constellation Diagram and MOT protocol decoded imbedded images, with MOT being station logo and track information. What more could you want? It is however very interesting to look into various aspects of this digital broadcast stream. Thank you for tracking this little gem down Phil.
Software link is included in the text version.
www.welle.io
Now to finish off, Nic VK7WW, has had another successful long distance QRP Morse Code contact. This time on 3553.7 kHz, but still using his recent transmitter project called the “Cent”, which Nic designed as a celebration of 100 years of Amateur Radio in Tasmania. Nics latest VFO add on project must have been utilised as it was no longer the original crystal locked frequency. This contact was with Mark VK6QI, who was using a remote station in Perth a couple of nights ago. This QSO spanned a distance of over 2950 Kilometres, from Legana Tasmania to Perth Western Australia. Still only using 1 Watt with a received signal report of 539 and no QSB. Thats pretty impressive QRP using one watt Nic!
Equipment pictures are available on the NTARC Web site under “Blogs” for this broadcast. Now back to the house keeping.
UPCOMING EVENTS
The Club Technical night - The next session will be on Wednesday the 9th of August and will commence at the winter time of 6.30 pm through to about 10.00 pm, at the Club room Archer Street, Rocherlea.
Coffee Morning - held every Friday in the NTARC Club rooms. Time is from 10am to noon and we look forward to seeing you all there. Why not pop in and join us for a cuppa, there is endless tea and coffee along with biscuits available for a donation.
Club General Meeting - Saturday the 12th of August at 2.00pm. Held at the NTARC Club Room, Rocherlea Scout Hall, Archer Street, Rocherlea. If you have items you would like added to the agenda please email the secretary at: secretary(at)ntarc.net no later than Friday the 11th of August.
The TestNet and TechNet session - Wednesday the 16th of August. TestNet/CW course on 3.580MHz from 7pm till 7.30pm…. and a TechNet on 3.567MHz from 7.30pm till about 8.30pm. Your host for the evening will be Phil VK7ZPD.
FINALLY - A reminder to all members that if you have any items of news you would like added to our weekly roundup, no matter how trivial, then please email them to the Secretary at the following address news(at)ntarc.net all items to be received no later than 5pm on the Friday prior to the Broadcast.
Thats all folks,
73 from Stefan, VK7ZSB, Secretary NTARC Inc.
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NEWS FROM THE SOUTH
Congratulations
A huge congratulations to Clayton VK7ZCR who this weekend got married.
We wish Clayton and his wife best wishes for their life together.
Thanks also to Peter VK3PG and Ross VK7WP who are covering DMR and DSTAR whilst Clayton is otherwise occupied.
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Radio and Electronics Association of Southern Tasmania
https://www.reast.asn.au/
https://www.facebook.com/reasttas/
https://www.youtube.com/reasthobart/
August Presentation Night - WIA Q&A with VK4EA
Our August presentation night saw a casual information and question & answer session with WIA Director, Peter Schrader VK4EA.
Peter started with some of his vast history and background and then went into a bit of WIA History, then the structure and the enormous work that the Education group is undertaking.
Peter then went into how the WIA supports the clubs, the committees and membership benefits.
Another area that the WIA is involved in is the International Advocacy including, World Radio Conference attendance, involvement in the International Amateur Radio Union, and International Member Societies.
In Australia WIA representation includes with the Australian Maritime College, and the Australian Communications and Media Authority and the Department of Communications, et.al.
Peter then went into some of the current issues that the WIA is dealing with like - higher power, class licence, assessment changes and threats to 23 and 9cm bands.
Peter then opened it up to questions.
A recording of the evening can be accessed on the REAST YouTube Presentations playlist.
https://www.youtube.com/watch?v=req-2yoFDxU
A huge thank you to Peter for agreeing to make himself available.
73, REAST Committee
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September Presentation Night - Cyber Threats with VK7BEN
A big thank you to Ben VK7BEN who has agreed to give us a presentation about Cyber Threats and how to be more safe online.
This presentation will be given on Wednesday 6th September 2023 from 7:30pm and will be streamed and go out on RF.
See you there.
https://www.facebook.com/events/1005728727341885
73, REAST Committee
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DATV Experimenter's Night
https://fb.me/e/33Wa7PKnF
This Wednesday night will see another interesting presentation from Rex VK7MO who has been experimenting with Brodie VK3MAP using spectrum lab to separate the direct signal from the signal that is scattered from the aircraft on 6 metres, 2 metres, 70 cm and 23 cm. This should be a fascinating presentation. Thanks Rx.
If we have time we also have some other historic and technical content to run through.
We stream the nights on the REAST YouTube channel.
https://www.reast.asn.au/news-events/live-stream/
https://www.reast.asn.au/special-interest-groups/amateur-tv/
https://www.youtube.com/c/ReastHobart/
We also go out on RF - DVB-T 7MHz Standard Definition on 445.5MHz. So, if you have a TV, Set-top box or USB DTV Dongle that you can tune and scan 445.5MHz and you can see the Queens Domain, then you have a good chance of receiving the DATV Experimenter's Night Signal. Look out for VK7OTC.
73, Justin, VK7TW
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Training and Assessments
Last Saturday there were two people - Zoe and Glen who undertook their Foundation Licence training and Assessment exams and David who undertook his Advance exam. We wish them luck and hope to hear them on the air soon.
The next REAST Foundation Licence training and all licence assessment day is next Saturday September 16th from 9:00am.
If you are thinking of coming along then please let Reg Emmett VK7KK REAST Learning Organiser know ASAP by phoning 0417 391 607 or via the REAST Website Contact Form.
https://www.reast.asn.au/contact/online-contact-form/
Check out the REAST Foundation Licence Training Videos that can be found on the REAST YouTube Training and Assessment playlist.
https://www.youtube.com/playlist?list=PLsnsP_zjw831mdC6sY4XqavRUY-53ZWUn
And checkout the REAST Facebook page events for further details.
https://fb.me/e/17zEAMy5T
73, Reg, VK7KK
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Technical News
TETRA radio protocol found to be vulnerable - Weak encryption in emergency services radio.
Dutch security researchers have disclosed a collection of vulnerabilities in the TETRA protocol used in emergency services, military, infrastructure and other applications.
Collectively dubbed TETRA.BURST, the vulnerabilities “allow for real-time decryption, harvest-now-decrypt-later attacks, message injection, user deanonymization, or session key pinning”, the researchers from company Midnight Blue said.
The vulnerabilities are all cryptographic flaws of some kind.
Most of the vulnerabilities, the researchers wrote, affect all TETRA networks, but vendors have begun shipping firmware patches.
Some need mitigation via “compensating controls”, the authors said.
A number of the vulnerabilities are rated critical.
Some are decryption oracle attacks, because TETRAs air interface encryption keystream “relies on the network time, which is publicly broadcast in an unauthenticated manner”, the researchers said.
A capable adversary could “intercept or manipulate law enforcement and military radio communications”.
There is also a backdoor in TETRAs TEA1 algorithm, used to encrypt the air interface.
The backdoor “reduces the original 80-bit key to a key size which is trivially brute-forceable on consumer hardware in minutes,” the researchers said.
This constitutes a “full break of the cipher”, they wrote, “allowing for interception or manipulation of radio traffic."
As well as intercepting traffic, an attacker could inject traffic.
For example, if an electricity utility was using TETRA for SCADA communications, an attacker could “perform dangerous actions such as opening circuit breakers in electrical substations”.
https://www.itnews.com.au/news/tetra-radio-protocol-found-to-be-vulnerable-598441
(Sourced from the IT News Web E-zine)
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VK Historical News
Howden Crystals
Barry McCann from Tas Maritime Radio dropped a box crystals off at the REAST Clubrooms the other day and Justin VK7TW went through them and found a couple of FT-243 holder Max Howden branded crystals.
This sparked his interest to find out more as this name is well known to many VK Amateurs. The following is sourced from the Radio Museum website.
Walter Francis Maxwell Howden (1899-1980) made the first successful, two-way amateur telegraphic shortwave radio contact between Australia and the US on November 4, 1924, followed by England 9 days later. This was from the experimental station "VK3BQ" he operated at his residence in Box Hill, Melbourne, Victoria.
In 1924, he worked as a Consulting Engineer for Corbett, Derham & Co. designing Tunaphone radios.
After a visit by Alf Treager and Dr John Flynn of the Royal Flying Doctor Service in 1930 he agreed to manufacture and supply crystals for Treager Flying doctor radios.
This was the start of his business which he operated from his home address. As business increased, he built a workshop/factory in his backyard. Initially the crystals were hand-ground and he later invested in a lapping machine. His staff were mainly family and he supplied the military with crystals during WW2.
He supplied crystals to industry and radio amateurs until he retired in the 1970s with his son taking over the business which he ran until the 1980s.
https://www.radiomuseum.org/dsp_hersteller_detail.cfm?company_id=20140
73, Justin, VK7TW
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Overseas Emergency Communications
Keeping lines open
Aside from combat readiness, open communications are equally valued by experts who have wondered how resilient Taiwan's communications would be in wartime, especially after two submarine internet cables relied upon by residents of the Taiwan-held Matsu Islands were severed earlier this year.
Ham radio enthusiasts who understand the importance of communications in a war zone, such as Chinese Taipei Amateur Radio League Chairman Randson Huang, told CNA that his league has continuously invested in studying wireless communications applications.
Huang said he and his fellow radio aficionados want to promote and expand the use of wireless communication because modern day 4G and even 5G technologies would be rendered useless if cell towers were brought down during an attack.
Even when not at war, 4G and 5G cell towers are vulnerable to events such as natural disasters, league secretary-general David Kao said.
In times of emergency, Kao said radio would be the quickest way to get updates out, as was the case with wireless stations set up during Taiwan's massive September 21, 1999 earthquake and the Typhoon Morakot disaster in 2009.
Huang revealed, however, that there remain barriers to making this a widespread pastime, including that operating wireless communications technology in Taiwan needs national certification.
https://focustaiwan.tw/politics/202307300006
(Sourced from Focus Taiwan- CNA E-News Website)
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Regular VK7 gatherings and events over the coming months:
Regular gatherings:
Sewing Circle Net – Daily on 3.640 MHz commences at 6:00pm AEST.
Statewide SSTV Net - held every Thursday night via the North/South Link on VK7RAF/VK7RJG from 7:30pm. In the North and North West - VK7RJG on 438.55 -7MHz and in the South - VK7RAF (146.650 -600kHz) CTCSS tone 141.3Hz to link RAF North-South.
State-wide – MICROWAVE QSO Party – following the Sunday broadcast call-back on 1296.15 MHz FM. One group in the greater Hobart area and another in the greater Launceston area.
Then North-south digital contacts on 1296.2MHz using Q65-60B.
Stations in the Launceston area transmitting on the odd minute. Southern stations on the even minute.
SOTA/WWFF Group – Meeting Mondays and Fridays 10.30-12.00 midday at Glebe Gardens Cafe, Henry St, Launceston.
NTARC - Fridays - Coffee mornings in the NTARC Club rooms from 10am to noon.
NTARC - Wednesday 16th August - TestNet and TechNet - TestNet/CW course on 3.580MHz from 7pm till 7.30pm and a TechNet on 3.567MHz from 7.30pm till about 8.30pm.
NTARC - Wednesday 9th August - Club Technical night - from 6.30 to 10.00 pm in the club room Archer Street, Rocherlea.
NW VK7 – Wednesday from 8:00pm local – NW Tassie Amateur Repeater Group Net on VK7RMD
NW VK7 - Thursday commencing at 8:30pm local - N.W. Tassie 2m DX Net 144.190 USB
NW SSTV Nights - 28 August - hosted by Eric VK7EV from 7:30pm using VK7RMD 70cm repeater on Mt Duncan on the 4th Monday in the Month.
Events:
NTARC - August 12 - Club General Meeting from 2.00pm in NTARC Club Room, Rocherlea Scout Hall, Archer Street, Rocherlea
REAST - September 6 - Cyber Threats with VK7BEN from 7:30pm in the Queens Domain Clubrooms
ALARA - November 3-6 - ALARAMeet 2023 - Hobart Tasmania
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Please note next week is the weekend of the Remembrance Day Contest and therefore there will only be a WIA Broadcast at 9AM on VK7RHT/VK7RAA Network. There will be no callbacks taken after the broadcast and rebroadcast station get to participate in the contest.
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You can hear this broadcast again on Tuesday night at 8:00pm on repeaters VK7RAA in Northern VK7 and VK7RHT in the South.
A huge thank you to all people and organisations that assisted with this broadcast.
--------------------------------
That concludes our VK7 Amateur Radio News Broadcast for this week.
You have been listening to or have just missed VK7WI. Next week the National WIA news can be heard at 0900 followed by the VK7 Amateur Radio News around 0930 hours.
Items for the broadcast can be emailed to vk7arnews(at)gmail.com
Further information about the broadcast can be found at the VK7 Amateur Radio News Groups.IO Group.
https://groups.io/g/vk7arnews
The deadline for items is 21:00 on Friday prior to the Sunday of the broadcast.
Callbacks will be taken on the frequency to which you are listening. Relay stations will use their own callsigns during the callback.
On behalf of the VK7 Amateur Radio News Team, 73, stay safe from Justin. VK7TW.
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(Posted to the packet network courtesy Tony VK7AX)
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