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VK7AX > BCAST 13.04.24 03:15z 546 Lines 26397 Bytes #18 (0) @ WW
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Subj: VK7 Amateur Radio News 14Apr24
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From: VK7AX@VK7AX.#ULV.TAS.AUS.OC
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VK7 Amateur Radio News 14Apr24
Text edition:
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VK7 AMATEUR RADIO NEWS BROADCAST
FOR SUNDAY 14th April 2024
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Welcome to the VK7 Amateur Radio News and this was first broadcast on Sunday the 14th April 2024. At the mike of VK7WI this week is Peter, VK7PD.
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 Clayton, VK7ZCR.
We go out on medium and high frequency courtesy of the following rebroadcast stations:
On 1.862 MHz by Any Takers,
On 3.670 MHz by Ross, VK7ALH
On 7.140 MHz by Peter, VK7TPE
On 14.130 MHz by Justin, VK7TW,
On 28.525 MHz by Garry, VK7JGD.
UHF CB Channel 24 in the Hobart area - Mark VK7FMAC.
You can hear this broadcast again on Tuesday night at 8:00pm on repeaters VK7RAA in Northern VK7 and VK7RHT and UHFCB24 in Southern VK7.
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Amateur Radio in the Media
Hayden VK7HH on ABC Local Radio
Hayden talked for a whopping 18m with Helen Shields on ABC Local Radio on the evening of Thursday 11 April 2024.
Hayden talked about how amateur radio is flourishing and how he got into amateur radio.
The presenter Helen Shields was surprised that Hayden was so young and interested in an “old persons” hobby!
Hayden covered his very popular YouTube Channel along with some of the interesting aspects like EME and SOTA.
A great promotional piece for the hobby.
A recording of the segment can be found on the REAST website and a link is available on the email edition of this broadcast.
https://www.reast.asn.au/2024/04/12/amateur-radio-in-the-media/
73, Justin, VK7TW
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Statewide News
Thursday Night SSTV Nets
Another busy net night that saw the following participants, VK7s – ZGK, TW, EV, FGGT, ZAB, KT and OO all sharing over forty photos.
The highlights were:
Research vessels – The Aurora Australis and Nuyina
Antarctic research vehicles - a snow tractor and helicopter
An RAAF Globemaster Transport Aircraft
How differently some things are done in France!
The 50th anniversary of Abba winning the Eurovision Song Contest – does that make you feel old?
Murals by Tasmanian artists, painted locally and in Mumbai
Realistic line drawings of animals
Various birds and dogs
Car bonnet mascots, including an unusual one
Vintage cars and motor bikes
The classic Holden with number plate GMH01
Radio telescopes and an X-Beam
A reversal of “Windows for Dummies"
A QR code for OOs SSTV website
And 73 from the Spirit of Tasmania
Remember Ken VK7KRJs and Steve VK7OOs fully automatic 24/7 monitoring sites that allows anyone who has sent an SSTV picture the ability to check them on their pages almost immediately, any time, both South and North Tasmania.
Also if you missed the net there are archives of all SSTV nights. These photos can be seen on Kens and Steves SSTV websites or on NTARCs website under blogs and arranged as weekly nets.
The suggested theme for next weeks net is “Music and anniversaries”.
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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Statewide News
QSL Update
Report - from Herman VK7HW Manager of the WIA VK7 Inwards QSL Bureau
If you live near another Amateur and can collect and deliver their cards to their QTH that would be a big help. Let Herman know if you can help.
The updated list of QSL cards held as at 12 April 2024 is in the email version of the broadcast.
Thank you to those who have been in touch about leaving cards at REAST Club rooms and sending stamps for direct mailouts.
If you have any questions re QSL cards, please contact Herman by email. herman(at)ozemail.com.au
73, Herman, VK7HW, WIA Manager VK7 Inwards QSL Bureau
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Cards held at 12 April 2024 ( Any errors in the listing are mine, I sometimes miss culling a call sign)
A, AAA, AAC, AAD, AAH, AAP, AAR, AB, ACE, ACG, ACN, AD, ADE, AED, AG(2014), AGC, AHT, AIR, AJC, AKK, ALZ, AM, ANC, AO, AP, APZ, AS, ATH, AXZ, AY, AZ
BA, BB, BBW, BD, BPV, BT, BU, BYE
CA, CBK, CBR, CH/T, CEJ, CJ, CMV, CX
DD, DG, DIK, DN, DO, DP, DQ, DY, DZ
EA, EG, EI, EK, ER
FADZ, FALX (alx), FAZZ, FCIA, FF, 75FFA, FG, FGGT, FLAR, FPRN, FRG, FRJG(RG), FTAS
GA, GEL, GGZ, GM, GOP, GR, GS, GU, GW
HCH, HDM, HDX, HH, HL, HOB, HRS, HSA, HSD, HSJ, HVK, HZ
IAN, ID, IK, IR, IS
JA, JAB, JAZ, JCR, JOK, JP, JS, JW, JX
KAC, KBA, KD, KDO, KI, KJ, KKR, KL, KO, KRJ
LCW, LDH, L J, LL, LLL, LM, LT, LVH
MA, MAG, MBD, MBP, MC, MD, MEL, MET, MJ, MRS, MS
NA, NC, ND, NEC, NET, NFI, NIK, NRF, NRT, NSE, NSS, NTE, NVH, NWT, NX
OB, OT
PAF, PBD, PM, PRN, PSH, PSJ, PSZ, PW
QK
RG/FRJG, RN, ROY, RJ
SD, SN, STO, SV, SZ
TCE, TED, TK, TL, TO, TR, TS, TUX, TX, TZ
UT,
VA, VAC, VAO, VAZ, VDC, VEK, VH, VI75G, VK7/AG9A9Mark), VR, VTM, VZ
WA, WC, WIA, WL, WO, WT, WUU
XDM, XV
Y, YN
ZE, ZJJ, ZK, ZM, ZR, ZT, ZX
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VI7ALARA Cards for QSO's with VK7's
Note * - There are a few OSL cards amongst the ALARA cards for VK7's.
AAE, ALB
CMV
DG*, DHT, DI, DT
EK, EV
FKLW, FMI
IAN, ID
KAM, KT, KW
LA
NB, NET*
OT
PSJ
RG*
STO
TPE
VKT
WN, WUU
ZPE
Cards in QSL Card Box at REAST WAGS @ 10 April - AZ, DC, EA, HSD, HVK, JGD, SD, STO, WN, ZBX
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NEWS FROM THE NORTH WEST
Wednesday Night Net is Moving
Reminder that Wednesday nights net is moving back to the 2m VK7RMD repeater.
Mt Duncan now has a refurbished 2m repeater operational, thanks to Dion VK7DB, the net will return to 2m VK7RMD next Wednesday 10th April
Input 146.025 output 146.625 tone 141.3
73, Eric, VK7NET, Net operator
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North West Tasmania Amateur Radio Club
NWTARC April meeting
NWTARC held its bi-monthly Club meeting on the 6th April 2024, at the Ulverstone Scout Hall.
Club Members voted to accept Andrew Hay VK7XR as a club member.
Andrew is an ACMA accredited amateur licence assessor, so will be able to assist Dave, the other clubs assessor in this role. Andrew has spent a lot of time working in the communications industry, and has an avid interest in the bands above 50mhz up to 10GHz,
The Club welcomed an offer from Dick VK7DIK from CCARC to take over ownership, control and maintenance of the VK7RMD repeater site.
This includes the equipment on site and spare repeaters etc. The Club will look into installing the UHF CB repeater licensed for the site, conduct an equipment audit, and begin negotiations with Parks and Wildlife re lease, and ACMA re licences.
The Club was delighted to have VK1JB Jeffrey visit, he is in Tasmania for a period of time. Jeff is a ACMA Specialist Accredited Assessor for the Canberra Region Amateur Radio Club.
Jeff gave us an insight into amateur radio in the ACT, the way his club operates, and gave us some great advice and ideas, in a Q&A session we had after the meeting, thanks Jeff.
Jeff also filled out a membership application, to join the club
The Club has decided to provide considerable support to anyone wanting to obtain an FCall licence. The Club will pay any fees from ACMA, and the club has some donated dual band handhelds, on completing successful exam, we may be able to provide a radio , with ongoing support, and assistance with guidance for antennas to enable a reasonable coverage if required.
The Club is planning to hold the car boot sale/sausage sizzle in May, depending on the Scout Hall availability. The day will be for any amateurs wanting to sell radio equipment, and will be advertise state-wide, with the $10 boot/table fee donated to Scouts.
Due to the June Club meeting clashing with a major comms event, that some members need to attend, we have requested permission from scouts, to hold the June club meeting on Saturday the 15th June.
Members enjoyed a great social time after the meeting closed, and there was great interest in the Spectrum analysers brought along by Andrew VK7XR. The devices functioned above 10Ghz.
Also, Club members could rummage through the equipment donated to the Club by VK7ARJ, with many going home with goodies.
73, Eric VK7EV, News Officer, NWTARC
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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
Remember last club technical night, we mentioned Colin VK7ZCFs “find of the decade” at the local “Recycal” agent. A four section commercial telescopic aluminium pole that extended to 5 metres, for a ridiculously low price of $10! This naturally lead to the possibility of portable use, which in turn would require a tow bar hitch for ease of mounting, then the need to be able to tilt it over for ease of antenna placement and finally a rotator controlled top section.
As a quick refresh for the latest update, the rotator section consisted of two aluminium tubes, one sliding easily within the other and turned freely. Colin machined up adaptors and mounted the cylindrical motor and gearbox within the larger diameter of the two tubes. With the application of 12 Volts DC this effectively rotates the inner tube and the attached antenna.
Since then Colin has constructed a hand held remote control unit for the antenna rotator. It provides direction of rotation control of the rotator at the “flick of a switch”.
For an added a touch of finesse into the construction…. He also incorporated a Pulse Width Controller, giving him the ability to adjust the rotational speed of the top section by the “twist of a knob”.
All this from a well spotted find of a telescopic pole, a very well stocked junk box, some hard work and only two minor purchases from e-bay of a motor-gearbox plus a tiny Pulse Width Controller board.
With some excellent engineering by Colin it all came together to make a convenient and portable set up. We will await the field trials.
Peter VK7SP has been trialing a new “SDRplay”, Software Defined Radio and putting it through its paces.
This is a small external enclosure unit as opposed to the usual “dongle” construction, but still plugs in via the USB port. We call it an SDR for short, but the English manufacturer refers to it as a “Radio Spectrum Processing receiver”! Peter has been running it attached to his PC and was using the proprietary SDRuno Software Defined Radio application platform to configure the unit. He was interested in downloading Weather Satellite images so he was also using “GPredict” software to track and predict the orbits of weather satellites. Doppler Correction software, for receive frequency correction and “WXtoImg” software to decode WEFAX signals from weather satellites to produces a viewable image. He has been running it with a temporary V antenna sitting about 600mm above the ground. This may not have had the best horizon to horizon capture window but the sample images Peter brought in to the tech night were successfully decoded and surprisingly good.
One image in particular showed the remnants of the recent Sydney region thunderstorms in stunning colour. Resolution did appear to be high and it will be interesting to compare this unit to a previously purchased “cost effective” Chinese dongle version. Cant wait to see some comparisons, possibly even with the antenna not quite so close to the ground. hihi
As always, pictures will be available on the NTARC Web site under “Blogs” for this broadcast.
https://www.ntarc.net/blogs
UPCOMING EVENTS
TestNet and TechNet session - Every Wednesday, 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 Nic VK7WW.
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. So why not pop in and join us for a cuppa, there is endless tea and coffee along with biscuits available for a donation.
Club Room Technical night session - The next session will be on Wednesday the 24th April and will commence at the usual time of 6.30 pm, running through to about 10 pm, at the Club room Archer Street, Rocherlea.
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
Radio and Electronics Association of Southern Tasmania
https://www.reast.asn.au/
https://www.facebook.com/reasttas/
https://www.youtube.com/reasthobart/
April Special Forum
Radio Safety Communications - Equine Endurance Events
https://www.youtube.com/watch?v=pyyZ2r04ljQ
We welcomed everyone along on Wednesday night and we started with Roger VK7ARN who gave us a presentation all about Equine Endurance Events. Roger covered the rides, riders, vet checks, championships and Tasmanian Amateur Radio Involvement.
There was a short history of how Amateurs got involved in Tasmania and then Roger went into what's involved starting with before the event, the main job, the sidelines, base and checkpoint jobs and then there was a slideshow of typical events.
Garry VK7JGD then took us through horse safety and checkpoint number checking and equipment on checkpoints - probably not handhelds! Garry bought along a simple Flowerpot 2m Antenna and a portable radio in a suitcase. He covered operating procedure and Justin VK7TW distributed actual check sheets , maps and course information from previous rides. We then took some questions and answers.
Thanks to Roger and Garry for coming along and presenting.
73, Justin, VK7TW
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May Presentation - Save the Date
“Pop” Medhurst A7AH - Tasmanian Wireless Pioneer
https://www.reast.asn.au/news-events/upcoming-events/?event_id1=2149
REASTs May presentation night will be a fascinating presentation on a true Tasmanian telegraphy, telephony and wireless pioneer - F.W. “Pop” Medhurst who started his wireless experimentation as A7AH.
It will be held on Wednesday night the 1st May 2024 from 7:30pm in the Queens Domain Clubrooms and it will also go out on DVB/T RF and via the REAST YouTube Channel streaming service.
This should be a great night, see you there.
73, REAST Committee
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May Special Forum
Field Day Operation
https://www.reast.asn.au/news-events/upcoming-events/?event_id1=2160
You may have seen those operators out in the bush or on top of a mountain with their antennas, batteries and rigs making contacts around the world and thought, I really wish I could do that!
The format will be a forum getting everyone together to share their experience, tricks of the trade, epic or not so epic fails and hints and tips of operating portable and mobile.
If you have any experience operating outside your shack be it through a contest, SOTA, POTA, WWFF, VKFF or Silos or some other “OTA” then please come along and share your experience with the group.
Bring along your “tricks of the trade” and show them off.
It will happen on Wednesday 8th May from 7:30pm in the Queens Domain Clubrooms.
The event will be streamed with an open chat channel where we will take questions and go out on DVB-T RF.
See you there.
73, REAST Committee
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June Presentation
Glitching Pulsars - the sequel we have all been waiting for!
https://www.reast.asn.au/news-events/upcoming-events/?event_id1=2163
Just after the discovery of pulsars by Jocelyn Bell in the late 60s, we have known about pulsars glitching. For 50 years astronomers have been trying to catch a glitch live with a large radio telescope. All failed.
Until in 2018 an unknown Tasmanian did what no one else in the world had. And it got him published in the worlds most prestigious journal.
What is a glitch? What is a pulsar? And what happened that made Nature publish his paper?
Dr Jim Palfreyman will present the sequel to his 2012 REAST talk. And like Godfather 2 and The Empire Strikes Back, it will be better than the original.
See you at the Queen's Domain Clubrooms on 5 June 2024 from 7:30pm. Presentation will be live and streamed via the REAST YouTube Channel.
73, REAST Committee
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Wednesday Experimenter's Group
I saw you do that double take..hihi!
Yes, the REAST Committee has decided to rename the DATV Experimenters Group to the Wednesday Experimenters Group or the WEGs to complement the Wednesday Afternoon Group or the WAGs. So we now have the WAGS and the WEGS.
People start arriving at the night around 6pm and many bring their dinner to enjoy. The DATV studio fires up at 7:30pm with streaming on the REAST YouTube channel and RF broadcasting. While the program is happening in the DATV Studio there is much discussion, experimenting, playing, talking, drinking coffee and tea, serious cunning plan development and general amateur radio shenanigans and world problem solving!!
This week in the studio we will have Rex VK7MO with some interesting findings on solar eclipses & lower noise floors on 23cm, we will be revisiting our EFHW portable and SOTA antennas and take a look at some wonderful ancient RS-232 - serial communications test equipment and much more.
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 stream the nights on the REAST YouTube streaming channel and 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.
See you there or on the stream.
73, Justin, VK7TW
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Training and Assessments
Our next REAST training and assessment day is Saturday 27th April 2024. If you would like to book for the next session 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
73, Reg, VK7KK
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Technology News
Researchers develop a tuneable terahertz wave filter
Electromagnetic waves in the terahertz frequency range offer many advantages for communications as well as other applications, but realising their potential poses some challenges. Researchers at Tohoku University have now addressed one of these challenges by developing a tuneable filter for signals in the terahertz wave band, which they have described in the journal Optics Letters.
Terahertz waves occupy a region of the electromagnetic spectrum between microwave and infrared frequencies. They have a higher frequency (shorter wavelength) than radio waves, but a lower frequency than visible light. The increasingly congested radio wave spectrum carries the vast amount of data transmitted by Wi-Fi, Bluetooth and current mobile phone communications systems.
The congestion of signals in lower frequency parts of the electromagnetic spectrum is one incentive for exploring the options in the terahertz region. Another is the capacity to support ultrahigh data transmission rates. A key hurdle to using terahertz signals for routine application, however, is the necessity to tune and filter the signals at specific frequencies. Filtering is required to avoid interference from signals outside of the desired frequency band.
“We have constructed and demonstrated a frequency-tuneable filter for terahertz waves which achieved a higher transmission rate and better signal quality than conventional systems, revealing the potential for terahertz wireless communications,” said Yoshiaki Kanamori from Tohoku University, who noted that the teams work could also be more widely applied outside of the terahertz frequency band.
The terahertz filter is based on a device called a Fabry–Pérot interferometer, which, like all interferometers, relies on the interference patterns created when different waves of electromagnetic radiation interact with each other as they bounce between mirrors. The researchers version uses finely structured gratings, with gaps smaller than the wavelength of the interacting waves, as the material between the mirrors. Variable stretching of the gratings allows the fine control of their refractive index necessary to tune the interferometers filtering effect. This allows only the desired frequency to be transmitted. Using different gratings allows control over different selected frequency ranges.
The researchers have already demonstrated their systems application for frequencies suitable for next-generation (6G) mobile phone signals, and they also envisage uses in scanning and imaging applications in medicine and industry. One advantage of terahertz waves in scanning and imaging is that they can readily penetrate materials, including biological tissues, that block the passage of light. In addition to medical applications, this can offer opportunities for materials analysis, security systems and quality control in manufacturing.
“Overall, our work offers a simple and cost-effective method to filter and actively control terahertz waves, which could advance their use in many applications,” Kanamori concluded.
https://www.criticalcomms.com.au/content/radio-systems/news/researchers-develop-a-tuneable-terahertz-wave-filter-592901818
Sourced from the Critical Comms Web E-zine
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Regular VK7 gatherings and events over the coming months:
Regular gatherings:
Sewing Circle Net – Daily on 3.640MHz commences at 6:30pm ADST.
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.
REAST - WAGs - Wednesday Afternoon Group from 12 noon in the REAST Clubrooms Queens Domain.
REAST - WEGs - Wednesday Experimenters Group from around 6pm with DATV show starting at 7:30pm in the REAST Clubrooms Queens Domain.
SOTA/WWFF Group – Meeting Mondays and Fridays 10.30-12.00 midday at Glebe Gardens Cafe, Henry St, Launceston.
NTARC - TestNet and TechNet sessions every Wednesday night. 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 - Coffee Morning this Friday at the NTARC Club rooms will be closed this coming Friday.
NTARC - Club Room Technical night session - Wednesday the 24th April from 6.30 pm Clubrooms, Archer Street, Rocherlea.
NW VK7 – Wednesday from 8:00pm local – NW Tassie Amateur Repeater Group Net on 2m VK7RMD - Input 146.025 output 146.625 tone 141.3
NW VK7 - Thursday commencing at 8:30pm local - N.W. Tassie 2m DX Net 144.190 USB
Events:
NTARC - April 13 - General Club Meeting from 2.00pm in the NTARC Club Rooms, Rocherlea Scout Hall, Archer Street, Rocherlea.
REAST - May 1 - Pop Medhurst - Tasmanian Wireless Pioneer with VK7TW - from 7:30pm in the Queens Domain and streamed.
REAST - May 8 - Field Day Forum - Wednesday 8th May from 7:30pm in the Queens Domain Clubrooms and streamed.
REAST - June 5 - Glitching Pulsars - the sequel we have all been waiting for with Dr Jim Palfreyman from 7:30pm in the Queens Domain Clubrooms and streamed.
NWTARC - June 15 - Club meeting - Scout Hall, Alexandra Rd, Ulverstone.
VK - November 2-3 - Tassie Ham Conference - Sandy Bay Campus UTAS
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A reminder to those people rostered for next weeks broadcast:
Newsreader: VK7RI
Repeaters: REAST, NTARC and in the NW thanks to N W T A R C, West Coast Radio Group, Cradle Coast Radio Amateur Radio Club, VK7AX, VK7JH and VK7DC
160m: VK7GS
80m: VK7TPE
40m: VK7ALH
20m: VK7JGD
10m: VK7DG
UHFCB24: VK7FMAC
DMR: Talk Group 5 and D-Star: Reflector 91C VK7ZCR
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You can hear this broadcast again on Tuesday night at 8:00pm on repeaters VK7RAA in Northern VK7 and VK7RHT and UHFCB24 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 and stay safe from Peter, VK7PD.
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(Posted to the packet network courtesy Tony VK7AX)
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