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Updated: 1 day 59 min ago

Clear Frequencies Requested for Storm Emergency Traffic

Sat, 07/13/2019 - 13:57
Storm Emergency Traffic IARU HF Championship Contesters:

The Hurricane Watch Net (HWNis active on 14.325 MHz and 7.268 MHz in response to Category 1 Hurricane Barry. WX4NHC at the National Hurricane Center has activated and plans to operate through landfall on Saturday. In addition, the Maritime Mobile Net is expected to be active on 14.300 MHz. All amateurs not involved in the storm response are encouraged to avoid these frequencies, allowing some 3 – 5 kHz of protection to avoid interference to critical communications.

The National Hurricane Center is warning against dangerous storm surges, heavy rainfall, and high wind conditions across the north-central Gulf Coast. As of 1500 UTC, Barry was some 40 miles south of Lafayette Louisiana, and about 50 miles west of Morgan City, Louisiana. The storm is generating maximum sustained winds of 75 MPH and is moving northwest at 6 MPH.

Source: ARRL

(Update: Friday, July 12, 2019 @ 11:30 AM CDT (1630 UTC)

Tropical Storm Barry is being forecast to become a Cat 1 Hurricane prior to landfall. Over the past few days, Barry has been forecast to reach hurricane status sometime before landfall but has just not strengthened that much. Overnight and this morning, Barry has begun to strengthen and now has maximum sustained winds of 65 mph and is expected to strengthen more before landfall sometime Saturday.

The Hurricane Watch Net will activate this evening at 7:00 PM EDT – 2300 UTC on both 14.325 MHz and 7.268 MHz. We will operate on 14.325 for as long as propagation allows and will suspend operations on 7.268 MHz at 11:00 PM EDT – 0300 UTC.  Net operations will resume Saturday morning at 8:30 AM EDT – 1230 UTC (using both 14.325 MHz and 7.268 MHz) or as soon as the Waterway Net concludes their operations. Once activated on Saturday, we will remain in operation until further notice.

At 11:00 AM EDT – 1500 UTC this Friday morning, Barry was located about 100 miles southwest of the Mouth of the Mississippi River and about 115 miles south-southeast of Morgan City, Louisiana.

Key Messages from the Discussion package of Advisory 9:

  1. There is a danger of life-threatening storm surge inundation along the coast of southern and southeastern Louisiana, portions of Lake Pontchartrain, and portions of coastal Mississippi where a Storm Surge Warning is in effect. Water levels are already beginning to rise in these areas, with the peak inundation expected on Saturday. The highest storm surge inundation is expected between Intracoastal City and Shell Beach.
  2. The slow movement of Barry will result in a long duration heavy rainfall and flood threat along the central Gulf Coast, across portions of the Lower Mississippi Valley and north into the Tennessee Valley through the weekend into early next week. Flash flooding and river flooding will become increasingly likely, some of which may be life-threatening, especially across portions of southeast Louisiana into Mississippi.
  3. Hurricane conditions are expected along a portion of the coast of Louisiana, where a Hurricane Warning is in effect. Tropical storm conditions are expected elsewhere along much of the Louisiana coast and inland across portions of south-central Louisiana where tropical storm warnings are in effect.

As with any net activation, we request observed ground-truth data from those in the affected area (Wind Speed, Wind Gust, Wind Direction, Barometric Pressure – if available, Rainfall, Damage, and Storm Surge). Measured weather data is always appreciated but we do accept estimated.

We are also available to provide backup communications to official agencies such as Emergency Operations Centers, Red Cross officials, and Storm Shelters in the affected area. We will also be interested to collect and report significant damage assessment data back to FEMA officials stationed in the National Hurricane Center.

As always, we are praying and hoping for the best yet preparing for the worst.

Sincerely,
Bobby Graves – KB5HAV
Net Manager
Hurricane Watch Net 

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3. LDMOS HF AMPLIFIER 100W INPUT 2400W OUTPUT BLF188XR 2 PCS 1.8-54 MHZ

Fri, 07/12/2019 - 15:15

LDMOS HF amplifier 90W  input 2400W CW SSB output  1.8-54 MHz
This a ready power amplifier. You will need a case and power supply only!

Water-cooled hermetically. You can turn the power amplifier. The water will not flow.

The power supply may be for example: FlatPack2 HE 2 pcs

Transistor BLF188XR 2 pcs.
Input power – 100W

 

The unevenness of amplification from 1.8 to 30 MHz is not more than 10%

Output power 2400W (SSB/CW) 1,8-30 MHz

Output power 2000W (SSB/CW)  50-54 MHz


Water cooling

Two levels of blowing. Running the second level at a copper radiator temperature is more than 50 degrees Celsius. Stop transmission for copper radiator temperature is more than 80 degrees Celsius.

Supply voltage 53V 
Voltage  13.8V  1,5A
SWR protection
Current Protection
Protection in power output
Protection against spontaneous or incorrect switching LPF.
LCD – out power and VSWR
LED indication of protection operation by SWR, current and maximum output power.
Installed on the cable output SO-239
TRX cable SO-239
Control  25 pin connector
Size 320 mm x 220 mm x 140(h) mm
Weight  6.23 kg

Power amplifier protection device:

Protection from exceeding the output power of 2400 watts.
Protection against exceeding the maximum drain current of the LDMOS transistor.
Protection against overheating – two thresholds of operation:
when the copper radiator is heated more than + 50С – the accelerated mode of the fan operation is activated to increase the heat removal.
when the copper radiator is heated above + 80 ° C, the protection system trips, breaking the PTT circuit. Transmission is not possible.
Protection against exceeding the SWR more than 2.0: 1. The activation of the SWR protection is independent of the output power level
Protection against false / spontaneous band switching in LPF.

The activated protection channel is indicated by a lit LED on the front panel of the power amplifier. To reset the error, it is necessary to switch off and on again the power supply of 48-53.7 V.

Design from R3KR

$2000

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Fri, 07/12/2019 - 13:34

Language in the Federal Aviation Administration (FAA) Reauthorization Act of 2018 will exclude all but a small number of Amateur Radio towers from marking requirements. Thanks to action taken in 2017 and 2018 by ARRL, the bill’s original language was amended to the extent that amateur towers, as well as residential towers used for over-the-air TV reception, were effectively exempted from marking requirements.

The topic was addressed at the annual “Ham Radio and the Law” forum at the Dayton Hamvention® this past May. Some key points from that presentation: (1) Towers covered by the rules are structures at least 50 feet tall that support an antenna and are located in a rural area or on farmland or immediately adjacent to such land. (2) According to the Act, the term “covered tower” does not include any structure that is adjacent to a house, barn, or other building, and “is within the curtilage of a farmstead or adjacent to another building or visible structure.”

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ARRL Regulatory Information Manager Dan Henderson, N1ND, explains that, while a few Amateur Radio towers will fall under the Act’s marking requirements and will have to be registered, towers in residential yards or within farmland are specifically exempted.

More information is on the ARRL website. 

Source: ARRL

 

An amateur radio tower with 39-foot-long horizontal antenna, shown on Friday, April 24, stirred up controversy after being installed in a backyard in Riverside’s Wood Streets neighborhood.

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HWN, WX4NHC at National Hurricane Center to Activate for Tropical Storm Barry

Fri, 07/12/2019 - 12:47

Responding to Tropical Storm Barry, the Hurricane Watch Net (HWN) and WX4NHC— the Amateur Radio station at the National Hurricane Center (NHC) in Miami — have announced plans to activate.

The HWN will activate today (July 12) at 2300 UTC on both 14.325 MHz and 7.268 MHz.

“We will operate on 14.325 for as long as propagation allows and will suspend operations on 7.268 MHz at 0300 UTC,” HWN Manager Bobby Graves, KB5HAV, said. “Net operations will resume Saturday morning at 1230 UTC (on both 14.325 MHz and 7.268 MHz) or as soon as the Waterway Net concludes operation.” Graves said that once the net activates on Saturday, it will remain in operation until further notice.

Graves said the HWN also will be available to provide back-up communication to official agencies in the affected area and will be collecting and reporting “significant damage assessment data” to FEMA officials at the National Hurricane Center.

WX4NHC will activate July 12 at 8 PM EDT (July 13 at 0000 UTC) and operate through landfall on Saturday.

“We encourage all ham operators in the affected area to take all safety precautions needed and comply with evacuation orders from authorities,” WX4NHC Assistant Manager Julio Ripoll, WD4R, said. The Hurricane Watch Net and WX4NHC typically coordinate their activities, with the HWN reporting weather data observed by participants to the NHC via WX4NHC.

Hurricane hunters report that Tropical Storm Barry is gaining strength. Forecasters predict additional strengthening before landfall; Barry is expected to be a hurricane when the center reaches the Louisiana coast. The NHC says dangerous storm surge, heavy rainfall, and high wind conditions are expected across the north-central Gulf Coast.

The heavy rainfall could generate additional flooding in the region. According to NHC forecasters, Barry is expected to produce total rain accumulations of 10 to 20 inches over south-central and southeast Louisiana as well as over southwest Mississippi, with isolated maximum amounts of 25 inches. “These rains are expected to lead to dangerous, life-threatening flooding over portions of the central Gulf Coast into the Lower Mississippi Valley,” the NHC forecast said

As of 1500 UTC, Barry was about 100 miles southwest of the mouth of the Mississippi River and some 115 miles south-southeast of Morgan City, Louisiana. The storm now boasts maximum sustained winds of 65 MPH and continues to move west-northwest at 5 MPH.

“A motion toward the northwest is expected to begin later today, followed by a turn toward the north Saturday night,” the NHC forecast said. “On the forecast track, the center of Barry will approach the central or southeastern coast of Louisiana through tonight and then make landfall over the central Louisiana coast on Saturday.”

Northern Florida ARES Section Emergency Coordinator Karl Martin, KG4HBN, has told ARRL that his team is monitoring Barry but does not expect the storm to affect Northern Florida. Martin said no plans are in place to formally activate the North Florida ARES Net.

Source:ARRL

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The post HWN, WX4NHC at National Hurricane Center to Activate for Tropical Storm Barry appeared first on QRZ NOW - Ham Radio News.

New Hope for the Coming Cycle | Space Weather News 07.12.2019

Fri, 07/12/2019 - 12:21

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News Clear Frequencies Requested for Storm Emergency Traffic July 13, 2019 in: News No comments

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EXTRAFLEX BURY /.400″ – Low loss Coax Cable

Fri, 07/12/2019 - 11:52
EXTRAFLEX BURY /.400″ [10,3 mm / 0,405 inches Cable]                     

WHY CHOOSE THIS CABLE:

– The only 10,3mm coax that can be use both for rotor operated antennas or direct burial / outdoor use!

– It has the same excellent attenuation of Hyperflex 10, including 19 wires in the central conductor which provides great flexibility. The only difference lies on the sheath, made of polyethylene (just like Airborne 10), that gives more resistence to the cable, so that it can be direct buried without problems. 

– We have applied an extra Petrol Jelly layer that helps the cable to prevent oxidation and makes ittotally waterproof!

 

 

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Video showing the suppression of a local noise source using a RSPduo and release 1.32 of SDRuno

Fri, 07/12/2019 - 11:05

SDRuno v1.32 release !

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The K7RA Solar Update

Fri, 07/12/2019 - 08:49

Like June 24-27, July 7 had a new spot from cycle 25, according to the magnetic signature. This week’s brief appearance was last Sunday with a daily sunspot number of 12.

Average daily solar flux declined marginally from 67.5 to 67.1.

Predicted solar flux for the next 45 days is 67 on July 12 through August 25. That’s right, 67 on every day.

Predicted planetary A index is 8 on July 12, 5 on July 13-15, then 12 and 8 on July 16-17, 5 on July 18-27, 8 on July 28, 5 on July 29 through August 4, then 12, 15 and 12 on August 5-7, 5 on August 8-23, 8 on August 24 and 5 on August 25.

 

Interesting article on space weather: https://bit.ly/2G7Oz5g

 

A recent video from Tamitha Skov: https://youtu.be/q066gUaSsAU

 

OK1HH is taking a week off from his geomagnetic forecast and will return next week.

 

On Thursday night ,as I put this bulletin to bed, I am enjoying monitoring remote receivers around the world, via https://sdr.hu/?q=kiwisdr. I am currently listening to European CW traffic on 40 meters from a receiver in Ukraine.

 

If you would like to make a comment or have a tip for our readers, email the author at, k7ra@arrl.net.

 

For more information concerning radio propagation, see the ARRL Technical Information Service at http://arrl.org/propagation-of-rf-signals. For an explanation of numbers used in this bulletin, see http://arrl.org/the-sun-the-earth-the-ionosphere.

An archive of past propagation bulletins is at http://arrl.org/w1aw-bulletins-archive-propagation. More good information and tutorials on propagation are at http://k9la.us/.

Monthly propagation charts between four USA regions and twelve overseas locations are at http://arrl.org/propagation.

Instructions for starting or ending email distribution of ARRL bulletins are at http://arrl.org/bulletins.

Sunspot numbers for July 4 through 10, 2019 were 0, 0, 0, 12, 0, 0, and 0, with a mean of 1.7. 10.7 cm flux was 67.8, 67.5, 66.5, 67.3, 66.5, 66.8, and 67.6, with a mean of 67.1. Estimated planetary A indices were 5, 5, 3, 5, 9, 17, and 15, with a mean of 8.4. Middle latitude A index was 8, 6, 5, 5, 7, 16, and 13, with a mean of 8.6.

Source:ARRL

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Hurricane Watch Net Keeping Close Watch on Tropical Storm Barry

Fri, 07/12/2019 - 07:11

Hurricane Watch Net (HWN) Manager Bobby Graves, KB5HAV, said the net is “keeping a very close eye” on Tropical Storm Barry, which could develop into a Category 1 hurricane. The HWN has announced no plans to activate, however, and remains at Alert Level 2 — monitoring mode. 

At 2100 UTC, the storm’s center was 90 miles south of the mouth of the Mississippi and some 175 miles southeast of Morgan City, Louisiana. The storm is generating maximum sustained winds of 40 MPH with higher gusts and is moving to the west at 5 MPH.

“Although hurricane watches and warnings are now in effect, the National Hurricane Center states that Barry could become a hurricane prior to landfall,” Graves noted. “Even if Barry does not reach Category 1 hurricane status, wind gusts to hurricane force are possible in the warning area. Regardless, if Barry becomes a hurricane or not, this system is looking to be a major rainmaker.” 

Forecasters concur that the storm will continue to intensify until making landfall. A danger exists of life-threatening storm surge along the coast of southern and southeastern Louisiana. The storm’s slow movement will result in an extended period of heavy rainfall and the threat of flooding along the central Gulf Coast and inland through the lower Mississippi Valley through the weekend into early next week, forecasters said. 

Source:ARRL

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The post Hurricane Watch Net Keeping Close Watch on Tropical Storm Barry appeared first on QRZ NOW - Ham Radio News.

W1AW, NU1AW to be Headquarters Multipliers for the IARU HF Championship

Thu, 07/11/2019 - 06:55

During the IARU HF Championship contest July 13 – 14, the ARRL HQ station will be W1AW/7, on the air from Nevada with Tom Taormina, K5RC, as control operator. IARU International Secretariat Club station NU1AW, which will be on the air from KC1XX in New Hampshire and from K1TTT in Massachusetts, also counts as an HQ station.

Both single and multioperator stations may operate the entire 24-hour period, and stations may operate on phone, on CW, or on both modes. IARU member-society HQ stations send signal report and official IARU member-society abbreviation (e.g., ARRL).

Members of the IARU Administrative Council and the three IARU regional Executive Committees send “AC,” “R1,” “R2,” and “R3,” as appropriate. All other stations send signal report and ITU zone

Source:ARRL

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2 Meter Band Explorations

Thu, 07/11/2019 - 06:48

“This band-exploration video looks at the amateur 2 meter band. We walk through the band. I talk about frequency coordination and band plans. I also discuss the latest panic about whether we’ll keep the 2 meter band. ” 

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Remote Antenna Switches – Ham Nation 410

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Chameleon MPAS 2.0 Modular Portable Antenna System

Wed, 07/10/2019 - 14:16

“Chameleon Antennas recently updated their Modular Portable Antenna System or MPAS with the goal of it being the most versatile, high performance, and rugged HF antenna system on the market. I think they’ve certainly hit that mark with the MPAS 2.0. The MPAS is no one antenna, but several rolled up into one modular system.

This building block approach makes it very flexible as you can deploy it as a vertical antenna, a horizontal antenna, end-fed, dipole, and even a man pack portable antenna.

With this level of versatility, Chameleon is clearly targeting the governmental and military markets along with NGO or non governmental organizations. But really this is perfect for the amateur radio market, prepper survival communications, and outdoor enthusiasts: especially those that want an infinitely deployable antenna for field operations. Chameleon CHA MPAS 2.0 Antenna:https://chameleonantenna.cartloom.com/store/PORTABLE_ANTENNAS

 

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IARU President Offers Assurances Regarding French 144 – 146 MHz Allocation Proposal

Wed, 07/10/2019 - 13:07

International Amateur Radio Union (IARU) President Tim Ellam, VE6SH/G4HUA, said his organization empathizes with the concerns of radio amateurs worldwide regarding a French proposal to allocate 144 – 146 MHz to the Aeronautical Service on a primary basis, essentially sharing it with Amateur Radio. The band is currently allocated to Amateur Radio on a primary basis around the world. Ellam this week offered assurances that the IARU is on top of the matter, which is still a regional issue, and is already working to keep the band in the hands of radio amateurs. While the issue could end up on the agenda of World Radiocommunication Conference 2023 (WRC-23), a lot would have to happen first.

“There is a lot of misinformation circulating as to what the proposal is seeking and how IARU is responding to it,” Ellam told ARRL. “While the proposal is a concern, petitions and the like, while well intended, are going to have very limited value and, in fact, may harm the steps being taken in the regulatory environment.”

The French proposal, submitted last month to a pre-WRC-19 European Conference of Telecommunications and Postal Administrations (CEPT) meeting, included 144 – 146 MHz within a range of frequencies to be studied for future airborne, non-safety applications in the Aeronautical Service. Germany opposed the move, and IARU “objected strongly,” Ellam said. “Nonetheless, the proposal was carried forward to the next meeting of the CEPT Conference Preparatory Group in late August.” IARU anticipates that other countries attending the August meeting will oppose the inclusion of 144 – 146 MHz as a frequency range to be considered for the WRC-23 agenda, Ellam said.

Since the June meeting, IARU Region 1 (Europe, Africa, and the Middle East) has asked its member-societies to contact their national administrations (i.e., governments) to explain the importance of the 144 – 146 MHz primary allocation, Ellam recounted. “IARU is also taking other actions to make its views known to those involved in the proposal,” he said.

According to Ellam, the French proposal provides no rationale for including the amateur band in the proposed spectrum study, and that IARU believes sharing with airborne systems would be extremely challenging and lead to constraints on the development of the Amateur and Amateur Satellite services. IARU has pointed out that suitable alternative spectrum exists in the VHF range.

“If accepted as a WRC-23 Agenda Item, this proposal would require 4 years of studies by administrations,” Ellam stressed. “Considering the challenges of sharing spectrum with aeronautical systems, it seems inevitable that the conclusion of such studies would be that sharing with a widely used part of the amateur spectrum presents too many problems to be viable.”

Ellam encouraged individual radio amateurs who want to help to become members of their IARU member-society — ARRL in the US. “The work they do is not as well-known as it should be and receives very little recognition,” Ellam said. “Support from all radio amateurs to the work of IARU is vital to meet threats to the amateur spectrum.”

Ellam attributed Amateur Radio’s success at previous WRCs in defending against spectrum threats and gaining new bands to “the support for IARU from its member-societies and the dedicated work of IARU representatives — all of whom are volunteers.”

“If anything,” Ellam concluded, “this recent news about a potential risk to 144 – 146 MHz should serve as a timely reminder that defense of the amateur spectrum does not just happen. Your member-societies and the IARU constantly work at defending the amateur allocations.” 

Source: ARRL

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The post IARU President Offers Assurances Regarding French 144 – 146 MHz Allocation Proposal appeared first on QRZ NOW - Ham Radio News.

ICOM EMCOMM-1 Emergency Communications Vehicle

Wed, 07/10/2019 - 10:19

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Chinese CAS-7B Satellite Carrying an FM Transponder to Launch

Tue, 07/09/2019 - 17:27

Another Amateur Radio satellite is set to launch from China. CAMSAT CEO Alan Kung, BA1DU, reports that CAS-7B (BP-1B) is expected to launch on July 22 at 0500 UTC, on the Hyperbola 1 vehicle. CAS-7B is a spherical spacecraft, 500 millimeters (approximately 19.7 inches) in diameter with a mass of 3 kilograms (about 6.6 pounds). The CW telemetry beacon will be on 435.715 MHz. The V/U FM 16 kHz wide transponder downlink is 435.690 MHz, and the uplink is 145.900 MHz. The launch from Jiuquan will be into a 300-kilometer (approximately 186-mile), 42.7° inclination orbit.

Source:ARRL

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The Best DMR Radio? Anytone AT-D878UV Bluetooth GPS

Tue, 07/09/2019 - 14:27

 

  • To fully utilize all the features you have to use Windows PC to program this radio. Not Compatible with CHIRP and RT systems software. FCC Part 90 Certified, FCC ID: T4KD878UV
  • New Features on AT-D878UV GPS version Roaming (Auto/Manual) Repeater Check (Out-of-range checking for repeater) Talker Alias (Send and Displays) Analog and DMR APRS Set channel name to yellow or white color Custom Standby background picture Compatible with 868 Codeplug.
  • The AnyTone D878UV GPS Dual Band radio was developed to conform to the DMR Tier I and II requirements. It offers state-of-the-art performance for both digital and analog operation at both the UHF and VHF frequency band. offers 4,000 Channels, 10,000 Digital Talk Groups with 150,000 Contacts.
  • The large color display offers clear information about the radio operation and function, including displaying whom you are connected to. The powerful transmitter is very reliable and offers up to 7 Watts of power for a hand-held.
  • Package Includes: AnyTone AT-D878UV dual band DMR/Analog radio USB Programming Cable and software High Gain Dual Band Antennas Li-ion Battery 3100mAh Belt Clip Charger base and AC Adapter User’s Manual AnyTone Sticker! TX and RX frequency range 136-174 MHz and 400-480 MHz

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IARU HF Championship 2019

Tue, 07/09/2019 - 12:58
IARU Contest About

Objective: to contact as many other amateurs, especially IARU member society HQ stations, around the world as possible using the 160, 80, 40, 20, 15 and 10 meter bands.

Online Log Submission – logs mustw be uploaded within 5 days after the event via the preferred online web service atcontest-log-submission.arrl.org.

Paper Log Submission – logs must be mailed/postmarked (within 5 days after the event) to: ARRL Contest Logs (IARU), 225 Main St, Newington CT 06111 USA.

IARU Rules

 

Contest Software

 

N1MM Logger+

DXLog.net

Tools

http://www.reversebeacon.net/

https://dxheat.com/dxc/

Score Distributor

http://scoredistributor.net/

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Excerpts from RSGB President’s letter to Ofcom regarding 144-146 MHz

Tue, 07/09/2019 - 10:00

After due consideration, and as reported in GB2RS news on Friday 5 July, RSGB President Dave Wilson, M0OBW wrote to Ofcom strongly expressing the RSGB’s concerns about the proposed WRC-23 aeronautical Agenda Item that includes 144-146 MHz.

The President’s letter started by stating that the RSGB ‘shares the concerns of the global amateur community and views the French proposal as lacking a proper understanding of the implications of sharing an aeronautical application with weak-signal terrestrial and space communications services’.

It continued by saying that ‘from our perspective, and in the view of the wider global amateur community, we do not foresee any realistic feasibility of a sharing scenario which does not seriously degrade or impede amateur usage of the spectrum, given the extent and complexity of current amateur services’ primary usage’.

The letter stated that there seems no justification for including this band in the proposed study, and that the RSGB is not convinced that there are ‘any innovative sharing methods’ which would not inevitably constrain both incumbent and new services’.

The letter went on to say that ‘inclusion of this spectrum in the study is likely to involve regulators in a lot of extra work, when the outcome can be sensibly predicted at this stage’.

A set of appendices were attached to the letter, to enhance understanding of amateur radio usage in this band, and emphasise why any study for such new use would inevitably be fraught with complexity and likely to be unsuccessful.

The letter concluded with requests regarding three other WRC Agenda Items – 50 MHz, Wireless Power Transfer (WPT) and 23cm/Galileo, where UK/Ofcom support is also sought.

For further information please see our WRC-19 focus pages.

Source:RSGB

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