Understanding the New 10-Day FCC Contact Rule for Radio Enthusiasts

1,877 words, 10 minutes read time.

The Federal Communications Commission recently implemented a significant shift in how it manages individual and entity contact information, mandating that all FCC Registration Number holders update their contact details within ten business days of any change. Effective February 5, 2026, this rule requires anyone with an FRN—including those preparing for or holding amateur radio credentials—to ensure their email and physical addresses are current in the Commission Registration System, known as CORES. The change was introduced to improve the accuracy of the FCC’s databases and ensure the government can reliably reach any person or business it regulates. While the most severe fines associated with this update primarily target robocallers, the underlying requirement to maintain accurate data applies to every single person in the system. Failing to keep these records straight can lead to a bureaucratic nightmare, ranging from missed official notices to the potential suspension of your operating privileges.

A core tenet of responsible radio operation is being reachable by the regulatory body that grants you the right to use the airwaves. As Scott R. Flick from the Comm Law Center points out, “this procedural improvement will also benefit other Commission databases beyond the Database that make use of contact information imported from CORES.” This means that the FCC is moving toward a more integrated, efficient system where they no longer hunt for you; it is your job to ensure the “digital mailbox” is always open. For a man looking to step into the world of amateur radio, understanding this logistical hurdle is just as important as knowing your frequency bands. It’s about maintaining your standing with the law and ensuring that when you finally earn that call sign, you don’t lose it over a clerical error or an old email address you haven’t checked since college.

The Functional Difference Between CORES and ULS

One of the most common pitfalls for newcomers is failing to realize that the FCC operates two distinct systems that do not talk to each other. You have the Commission Registration System (CORES), which houses your FRN and your “business” relationship with the government, and then you have the Universal Licensing System (ULS), which manages the specifics of your actual radio license. The new 10-day rule specifically focuses on the CORES data. If you move houses or change your primary email, updating it in one system will not automatically update it in the other. This redundancy is a classic example of government architecture—you have to be proactive and check both boxes.

According to the ARRL, “FRN contact information is handled separately and apart from contact information related to a license in the License Manager System. Both records must be kept up-to-date, and each requires a separate update.” For the practical, no-nonsense man, this means setting a calendar reminder every time you move or switch providers. It’s a simple task that takes five minutes but prevents a mountain of trouble. Think of your FRN as your permanent ID with the FCC; it stays with you for life, regardless of whether you have one license or ten. Keeping that ID linked to a live, working email is the “Day 1” task for any serious operator.

Enforcement and the Reality of Financial Penalties

There has been a lot of noise in the community regarding massive daily fines for missing the 10-day window. It is vital to separate the “robocall” penalties from the general amateur requirements. The $1,000 per day fine that made headlines is specifically aimed at those filing in the Robocall Mitigation Database. However, don’t let that lull you into a false sense of security. The FCC has a long-standing “base forfeiture” of $1,000 for failing to maintain required records or respond to official correspondence. If the FCC tries to reach you regarding a technical interference issue and your email bounces because you didn’t update it within that ten-day window, you are technically in violation of federal rules.

The Michigan Association of Broadcasters notes that “the new rule reinforces that… outdated information could result in legal penalties – but panic is likely not in order.” The reality is that for an individual, the FCC isn’t going to hunt you down with a fine the minute you hit day eleven. The danger is “silence.” If they send a notice and you don’t get it, the next step isn’t another email; it’s a suspension or revocation of your ability to operate. In the eyes of the Commission, if they can’t find you, you don’t exist, and if you don’t exist, you don’t get to use the spectrum. It’s a binary outcome that every man should respect: stay current or get cut off.

The Shift to Digital-Only Correspondence

The days of receiving a thick envelope with a paper license and a gold seal are over. The FCC has transitioned almost entirely to electronic correspondence. This is the primary driver behind the strict 10-day update rule. If the government is no longer spending money on postage, they are putting the burden of “deliverability” on you. When you apply for a license or an upgrade, the FCC will send a link to your official electronic copy. This link is often temporary, usually expiring within 30 days. If your email is out of date, you’ll never see that link, and you won’t have your official credentials to show when someone asks for them.

As the FCC confirmed in recent guidance, “The FCC will use the email address supplied by amateurs to correspond with applicants, including to send a link to the official electronic copy of the license… The FCC is transitioning to fully electronic correspondence and no longer mails hard-copy licenses.” This underscores why the email address you provide cannot be a “burner” or an account you rarely check. It needs to be a stable, professional point of contact. For those concerned about privacy, the FCC does mask email addresses from the general public in the ULS, but they remain fully accessible to the Commission for enforcement and notification purposes.

Maintaining Privacy While Staying Compliant

For many men, the idea of having their home address and contact info in a public government database is a non-starter. However, the rule is firm: you must provide a valid mailing address where you can receive mail. The 10-day rule applies here just as strictly as it does to email. If you value your privacy, you aren’t stuck with listing your front door. Many operators utilize a P.O. Box or a virtual mail service to satisfy the “mailing address” requirement while keeping their residential location off the public record.

The key here is that the address must be reliable. Using a P.O. Box is perfectly legal under the rules, but you still have to check it. If the FCC sends a certified letter and it gets returned as “unclaimed” because you haven’t checked your box in a month, you are in the same boat as the guy with the dead email address. Compliance isn’t just about the initial filing; it’s about the ongoing maintenance of the channel. As emphasized by Bizee, “Your registered address isn’t just a formality; it’s how the FCC knows where to send renewal notices, rule updates, or (gulp) violation warnings.” Using a professional mailing service or a dedicated P.O. Box is a tactical move for any man who wants to balance his hobby with his personal security.

[Image showing the difference between a residential address and a P.O. Box on an FCC license document]

Tactical Steps for Future Operators

If you are currently studying or preparing to join the ranks of licensed operators, your first move should be to create an FCC Username and secure an FRN before you ever step foot in a testing session. This allows you to control your data from the start. Once that FRN is issued, you are officially on the clock. Any change to your situation—a move, a new primary email, or even a name change—needs to be reflected in CORES within those ten business days. It’s about building the habit of administrative discipline.

When you sit for your exam, you will provide that FRN to the Volunteer Examiners. Because your data is already in the system and you’ve verified it, the processing of your license will be significantly faster and less prone to errors. Think of this as the “pre-flight check” for your radio career. You wouldn’t key up a radio without checking your SWR, and you shouldn’t hold a license without checking your contact info. The 10-day rule isn’t a threat; it’s a standard of performance. Adhering to it shows the Commission and your fellow operators that you are a serious, competent individual who understands the responsibilities that come with the privilege of using the airwaves.

Future Developments in FCC Oversight

Looking ahead, we can expect the FCC to continue tightening its digital requirements. The transition to the “New CORES” system and the integration of diverse databases suggests that the Commission is moving toward a “single source of truth” for every individual they interact with. This could eventually mean more automated checks and potentially even automated “nudges” if the system detects a potential discrepancy in your data. While we aren’t at the point of automated fines for amateur operators yet, the framework is being built.

The broader significance of the 10-day rule is a shift toward a more professionalized amateur service. As the airwaves become more crowded and the value of spectrum increases, the government has less patience for “ghost” accounts and uncontactable licensees. By staying on top of your FRN requirements, you aren’t just avoiding a fine; you are protecting the future of the hobby for everyone. Accurate data helps the FCC defend our frequency allocations and manage interference effectively. It’s a small price to pay for the freedom to communicate across the globe.

Call to Action

If this story caught your attention, don’t just scroll past. Join the community—men sharing skills, stories, and experiences. Subscribe for more posts like this, drop a comment about your projects or lessons learned, or reach out and tell me what you’re building or experimenting with. Let’s grow together.

D. Bryan King

Sources

• Keep Your FRN Information Updated: FCC Fines Could Add Up Quickly – Wiley Rein
• FCC Requires That FRN Contact Information Be Updated Within Ten Days of a Change – ARRL
• FCC Issues a Welcome Clarification on FRN Order – Comm Law Center
• UPDATED: Keep Your FRN Information Up to Date – Wiley Rein
• Common Amateur Filing Tasks – Federal Communications Commission
• Call Sign Renewals or Changes – ARRL
• FCC Sets Requirement to Promptly Update FCC Registration Numbers – Michigan Association of Broadcasters
• FCC Ham Radio Address Rules: Stay Compliant & Protect Your Privacy – Bizee
• How to Register for your FRN – Ham Radio Prep
• FCC Reports and Orders on Foreign Ownership Rules – Telecommunications Law Professionals
• Amateur Radio Complaints – Federal Communications Commission
• You may need to update your FRN – Groups.io
• FCC Tutorial: Updating FRN Information – Federal Communications Commission
• 47 CFR Part 1 Subpart W – FCC Registration Number – eCFR

Disclaimer:

The views and opinions expressed in this post are solely those of the author. The information provided is based on personal research, experience, and understanding of the subject matter at the time of writing. Readers should consult relevant experts or authorities for specific guidance related to their unique situations.

The Silent Siege: Defending the Radio Spectrum in an Age of Noise

3,286 words, 17 minutes read time.

The electromagnetic spectrum is currently facing an unprecedented siege from commercial expansion, environmental noise pollution, and regulatory encroachment, threatening the viability of independent communication. This conflict involves a diverse cast of actors ranging from multinational telecommunications conglomerates and unsuspecting homeowners to a dedicated community of radio operators who stand as the last line of defense for this invisible public resource. While the general public remains largely unaware of the radio waves passing through them, a fierce battle is being waged for control of these frequencies, occurring in corporate boardrooms, legislative chambers, and the backyards of suburban neighborhoods. The stakes are considerably higher than mere hobbyist chatter; at risk is the ability to maintain decentralized, resilient communication infrastructures independent of the fragile commercial grid. As the demand for wireless data explodes and the noise floor rises, the preservation of the spectrum requires a concerted response from informed men willing to understand the physics, the policy, and the practical application of radio technology.

The Commercial Encroachment on Finite Resources

The most immediate and powerful threat to the radio spectrum comes from the insatiable commercial appetite for bandwidth. As modern society transitions into an era defined by the Internet of Things and 5G connectivity, corporate entities are aggressively lobbying for access to every available slice of the radio frequency pie. This creates a direct conflict with existing services, including the bands historically allocated for amateur and emergency use. The spectrum is a finite physical resource; unlike fiber optic cables where more strands can be laid, there is only one electromagnetic spectrum. When a frequency band is auctioned off to the highest bidder for billions of dollars, it is often lost to the public domain forever. This commoditization of the airwaves treats a law of nature as a piece of real estate to be fenced off and monetized.

The pressure is particularly intense because the specific frequencies that are most desirable for long-range communication or high-penetration data signals are the very same frequencies that have been cultivated by amateur operators for decades. Telecommunications giants view these bands as underutilized assets waiting to be exploited for profit. The concept of “use it or lose it” has never been more relevant. If a community of capable operators does not actively occupy and defend these frequencies through demonstrated utility and public service, regulators face immense pressure to reallocate them to commercial interests. This reality turns every licensed operator into a stakeholder in a global resource management crisis. The defense against this encroachment is not just about complaining to regulators; it involves demonstrating the unique value of non-commercial spectrum access, particularly its role in disaster recovery when profit-driven networks fail.

The Rising Tide of the Noise Floor

While commercial reallocation attempts to steal the spectrum from above, a more insidious threat is rising from below: Radio Frequency Interference (RFI). This phenomenon is often referred to as the rising “noise floor.” In the past, turning on a radio receiver resulted in a quiet hiss of static, out of which a voice or signal would clearly emerge. Today, that quiet background is increasingly replaced by an angry roar of electronic smog. This pollution is generated by millions of poorly shielded consumer electronic devices. LED light bulbs, variable speed pool pumps, cheap switching power supplies, and solar panel inverters spew stray radio frequency energy into the environment. To a casual observer, these devices are harmless conveniences; to a radio operator, they are jammers that blind receivers and render communication impossible.

This environmental degradation of the electromagnetic spectrum creates a scenario where even if the frequencies are legally protected, they become practically useless. It is akin to owning a plot of land that has been flooded by toxic waste; you may hold the deed, but you cannot build on it. The physics of radio reception rely on the signal-to-noise ratio. As the noise floor rises, stronger and stronger signals are required to break through, effectively shrinking the range of communication systems. A handheld radio that could once talk to a station thirty miles away might now struggle to reach three miles across a noisy city. This threat is largely unregulated at the consumer level, as the enforcement of interference standards has lagged behind the proliferation of cheap electronics imported from manufacturers who cut corners on shielding.

Community Response and Technical Stewardship

The response to these threats has catalyzed a sophisticated movement within the radio community focused on stewardship and technical innovation. This is not a passive group; it consists of technically minded individuals who view the spectrum as a public trust. The primary weapon in this response is education and technical adaptation. Operators are developing new digital transmission modes designed specifically to function in high-noise environments. These modes use advanced signal processing and error correction to decode messages that are buried deep beneath the electronic smog, effectively reclaiming territory that was thought to be lost. This demonstrates a resilience and ingenuity that defines the spirit of the radio community. Rather than surrendering to the noise, they engineer their way through it.

Furthermore, the community response involves active monitoring and “fox hunting”—the practice of locating sources of interference. When a rogue signal or a malfunctioning device disrupts communications, operators use directional antennas and triangulation techniques to physically track down the source. This can lead to diplomatic engagements with utility companies to fix arcing power lines or helping a neighbor replace a noisy power supply. It is a form of neighborhood watch, but for the electromagnetic environment. This hands-on approach requires a deep understanding of wave propagation and electronics, skills that are honed through the pursuit of licensure and regular practice. It reinforces the idea that the spectrum is a shared backyard, and it is the responsibility of the residents to keep it clean.

The Regulatory Battlefield and Property Rights

Beyond the technical challenges, a significant battle is being fought on the regulatory front involving Homeowners Associations (HOAs) and private land covenants. These restrictions often prohibit the installation of external antennas, effectively locking millions of potential operators out of the spectrum. The “CC&Rs” (Covenants, Conditions, and Restrictions) that govern many modern housing developments prioritize aesthetic uniformity over functional resilience. This creates a paradox where a resident may legally hold a federal license to operate a radio station for emergency communications but is contractually banned from erecting the antenna necessary to use it. This represents a clash between private contract law and the public interest in maintaining a dispersed, capable civil defense network.

The community response to this has been a mix of legislative lobbying and stealth engineering. Legislation like the Amateur Radio Parity Act has been introduced in various forms to try and force a compromise, arguing that reasonable accommodation for antennas is a matter of national safety. On the ground, operators have become masters of stealth, deploying “invisible” antennas disguised as flagpoles, hidden in attics, or woven into landscaping. This ingenuity allows men to remain active and capable despite the restrictions, maintaining their readiness and their connection to the airwaves. It is a quiet act of rebellion, asserting the right to communicate and the duty to be prepared, regardless of arbitrary rules set by a housing board.

Strategic Implications of Spectrum Dominance

The importance of this subject extends into the realm of national security and strategic independence. In an era of cyber warfare and potential infrastructure attacks, reliance on centralized communication networks—like cell towers and the internet—is a vulnerability. These systems are fragile; they depend on the power grid, fiber backbones, and complex software stacks that can be hacked or jammed. The radio spectrum, accessed through decentralized amateur equipment, offers a fallback layer that is robust because of its simplicity and distribution. There is no central switch to turn off the ionosphere. There is no server farm to bomb that will silence point-to-point radio communication.

Understanding the spectrum allows an individual to step outside the “matrix” of commercial dependency. When the cellular networks are congested during a crisis, or when internet service providers suffer outages, the radio operator remains connected. This capability is not just about personal safety; it is a community asset. The response to spectrum threats is fundamentally about preserving this capability for the greater good. It aligns with a masculine ethos of protection and provision—ensuring that when the primary systems fail, a secondary, hardened system is ready to take over. This requires a workforce of licensed operators who are not just hobbyists, but disciplined communicators who understand the strategic value of the frequencies they guard.

Historical Context of Spectrum Allocation

To fully appreciate the current threats, one must understand the history of how the spectrum was tamed. In the early days of radio, the airwaves were a chaotic frontier, much like the Wild West. There were no lanes, no rules, and constant interference. The catalyst for order was the sinking of the Titanic in 1912. The tragedy highlighted the deadly consequences of unregulated communication, where distress calls could be missed or jammed by irrelevant chatter. This led to the Radio Act of 1912, which established the principle that the spectrum is a public resource to be managed by the government for the public good. It established the licensing structure that exists today, creating a hierarchy of users and prioritizing safety of life.

Over the last century, this allocation has evolved into a complex map of frequency blocks assigned to military, aviation, maritime, commercial, and amateur users. The amateur allocation was not a gift; it was carved out by pioneers who proved that the “useless” shortwave frequencies could actually span the globe. Today’s operators are the inheritors of that legacy. They occupy the bands that their predecessors explored and charted. The threat of losing these bands is a threat to erase that history and the public’s right to access the airwaves directly. The historical perspective reinforces why the community is so defensive of its privileges; they know that once a frequency is surrendered to commercial interests, it is never returned.

The Human Element of the Network

Technology and policy are critical, but the most vital component of spectrum defense is the human operator. A radio is merely a collection of capacitors and transistors until it is powered by a human intent on communicating. The decline in the number of active, knowledgeable operators is perhaps the greatest threat of all. A spectrum that is silent is a spectrum that is vulnerable to reallocation. The community needs fresh blood—men who are willing to learn the code, understand the electronics, and join the network. This is not about nostalgia for old technology; it is about maintaining a vital skill set in the modern world.

The culture of the radio community is one of mentorship and rigor. It welcomes those who are willing to put in the work to understand the medium. When a man decides to study the spectrum, he is not just preparing for a test; he is learning the language of the universe. He learns how the sun’s cycles affect communication, how the terrain shapes a signal, and how to build systems that survive when others fail. This human element is the ultimate check against the threats of noise and encroachment. An educated, active populace is the strongest argument for the continued preservation of the amateur bands.

Technological Adaptation and the Future

Looking forward, the defense of the spectrum will rely heavily on software-defined radio (SDR) and cognitive radio technologies. These advancements allow radios to be smarter, sensing the environment and finding clear frequencies automatically. The community is at the forefront of experimenting with these tools. By pushing the boundaries of what is possible with limited power and bandwidth, amateur operators often innovate solutions that are later adopted by the commercial and military sectors. The fight against spectrum pollution is driving the development of better filters and more robust digital protocols.

This technological evolution transforms the operator from a passive user into an active researcher. It makes the pursuit of a license an entry point into a world of high-tech experimentation. The threats facing the spectrum are forcing the community to up its game, resulting in a renaissance of technical learning. Men who engage with this subject find themselves gaining proficiency in computer networking, antenna physics, and signal processing—skills that are highly transferrable and economically valuable in the modern marketplace. The defense of the hobby thus becomes a pathway to professional development and technical mastery.

The Role of Organized Advocacy

No individual can fight the telecommunications lobby or the tide of electronic noise alone. The response is coordinated through national and international bodies that represent the interests of the non-commercial user. Organizations act as the shield, employing legal experts and engineers to testify before government commissions and international bodies like the International Telecommunication Union (ITU). They monitor legislative proposals, file comments on rule-making proceedings, and alert the membership when immediate action is required.

Supporting these organizations is a key part of the community response. It involves a recognition that rights must be defended collectively. The effectiveness of this advocacy depends on the size and engagement of the membership. A large, active body of licensed operators commands respect in Washington and Geneva. It signals to regulators that this is a voting block and a skilled workforce that cannot be ignored. The political aspect of spectrum defense is dry and often bureaucratic, but it is the trench warfare that keeps the frequencies open for the operator to use.

Natural Threats and Solar Cycles

The spectrum is also subject to threats that are entirely natural and beyond human control. The sun, the ultimate source of all radio propagation on Earth, goes through eleven-year cycles of activity. During the peak of these cycles, solar flares and coronal mass ejections can cause radio blackouts, wiping out communication across entire hemispheres. While this is not a “threat” in the sense of a malicious actor, it is a challenge that requires a deep understanding of space weather. The operator must know how to read the solar indices and adjust their strategies accordingly.

This connection to the cosmos adds a profound dimension to the spectrum. It reminds the operator that they are dealing with forces of nature. The community response to solar weather involves building networks of automated beacons that monitor propagation in real-time, providing data that is used not just by hams, but by scientific institutions. It turns the operator into a citizen scientist, contributing to our understanding of the sun-earth connection. This resilience in the face of natural variation is part of what makes radio operators so valuable during earthly disasters; they are accustomed to adapting to changing conditions.

The Economic Reality of Spectrum Auctions

It is impossible to discuss spectrum threats without addressing the sheer scale of the money involved. Governments view spectrum auctions as a painless way to raise revenue. Billions of dollars are exchanged for the exclusive rights to transmit on specific frequencies. This creates a David and Goliath dynamic. The amateur community cannot buy the spectrum; they can only argue for its value based on public service and educational merit. This is a difficult argument to make in a capitalist system that prioritizes immediate revenue over long-term resilience.

However, the economic argument is shifting. As infrastructure becomes more vulnerable to cyber-attacks, the “insurance policy” value of a trained volunteer radio corps is being reassessed. The cost of a total communications blackout during a hurricane or terrorist attack is astronomical. The community argues that the spectrum they occupy is a down payment on national safety. By maintaining these frequencies for public use, the government avoids the cost of building and maintaining a redundant emergency network of their own. It is a symbiotic relationship, but one that requires constant reminder and defense against the lure of quick auction cash.

Cybersecurity and the Radio Spectrum

The convergence of radio and computing has introduced cyber threats into the spectrum domain. Modern radios are often computers with antennas, and like any computer, they can be vulnerable. Malicious actors can exploit software vulnerabilities to jam networks, spoof signals, or inject false data. The “spectrum threat” now includes the possibility of hostile state actors using electronic warfare techniques to disrupt civil society.

The community response has been to embrace cybersecurity best practices. This includes verifying signal integrity, using digital signatures, and developing “air-gapped” systems that can operate without connection to the public internet. The modern operator must be part hacker, part engineer. This evolution appeals to men who are interested in information security and systems architecture. It frames the license not just as a permit to talk, but as a credential in the field of information assurance.

The Imperative of Self-Reliance

Ultimately, the drive to understand and defend the spectrum is rooted in the imperative of self-reliance. In a world where systems are increasingly interconnected and interdependent, the failure of one component can lead to cascading collapse. The man who holds a radio license and understands the spectrum possesses a tool of independence. He is not reliant on a monthly subscription or a functioning cell tower to ensure the safety of his family or community.

This self-reliance is the core motivation that drives the community response. It is why they build their own antennas, why they fight the HOAs, and why they study for the exams. It is a refusal to be helpless. The spectrum is the medium through which this independence is exercised. Protecting it is protecting the ability to act when others are paralyzed by a loss of connectivity. It is a masculine pursuit of competence and readiness in an unpredictable world.

Conclusion: The Future of the Frequency

The future of the radio spectrum is far from guaranteed. It stands at a crossroads between total commercialization and a balanced model that preserves public access. The threats of noise, regulation, and encroachment are unrelenting. However, the response from the community has been equally persistent. Through technical innovation, political advocacy, and a commitment to service, the guardians of the airwaves are holding the line.

For the man looking from the outside, this struggle represents an opportunity. It is a chance to join a fraternity of capable individuals who are not content to be passive consumers of technology. By engaging with the subject, understanding the physics, and eventually stepping up to earn the credentials, one becomes part of the solution. The spectrum is a heritage and a responsibility. It requires vigilant defense to ensure that when the world goes silent, there is still a signal in the noise, clear and strong, ready to carry the message.

Call to Action

If this breakdown helped you think a little clearer about the threats out there, don’t just click away. Subscribe for more no-nonsense security insights, drop a comment with your thoughts or questions, or reach out if there’s a topic you want me to tackle next. Stay sharp out there.

D. Bryan King

Sources

• Federal Communications Commission – RF Safety and Spectrum Engineering
• ARRL – Regulatory and Advocacy: Defending the Frequencies
• International Telecommunication Union (ITU) – Radiocommunication Sector Mission
• IEEE Spectrum – Telecommunications and RF News
• National Telecommunications and Information Administration (NTIA) – Spectrum Management
• RFI Services – Understanding Radio Frequency Interference
• Homeland Security Newswire – Critical Infrastructure and Communications
• Historic Naval Ships Association – History of Radio Communications
• Ofcom – Spectrum Management and Strategy
• NASA – Space Communications and Navigation: Spectrum Policy
• NOAA Space Weather Prediction Center – Radio Blackouts and Solar Threats
• CISA – Emergency Communications Division
• W5YI – Amateur Radio Testing and Regulatory Updates

Disclaimer:

The views and opinions expressed in this post are solely those of the author. The information provided is based on personal research, experience, and understanding of the subject matter at the time of writing. Readers should consult relevant experts or authorities for specific guidance related to their unique situations.

#5GExpansion #AirGappedSystems #Airwaves #AmateurRadio #AntennaParity #antennaTheory #BandwidthScarcity #CivilDefense #CognitiveRadio #CommercialEncroachment #CommunicationBlackout #CoronalMassEjections #cyberSecurity #DecentralizedNetworks #digitalModes #DigitalSignatures #DirectionFinding #DisasterRecovery #electromagneticSpectrum #ElectronicSmog #ElectronicWarfare #ElectronicsHobby #emergencyCommunications #errorCorrection #FCCRegulations #FoxHunting #FrequencyAllocation #frequencyCoordination #FrequencyGuard #FutureOfRadio #GridDown #hamRadio #HFBands #HOARestrictions #IndependentInfrastructure #InformationAssurance #InterferenceHunting #IonosphericSkip #ITUStandards #LicensedOperator #MensHobbies #MicrowaveFrequencies #MonitoringStations #NationalSecurity #NeighborhoodWatch #NetworkResilience #NoiseFloor #OffGridComms #Preparedness #PropertyRights #PublicResource #publicSafety #RadioAct #radioBlackout #RadioEngineering #RadioFrequencyInterference #RadioLicensing #RadioPhysics #radioReceiver #RadioSilence #radioSpectrum #ResilientSystems #RFI #SDRTechnology #SecureComms #SelfReliance #shortwaveRadio #signalProcessing #signalStrength #SignalToNoiseRatio #softwareDefinedRadio #SolarCycles #SpaceWeather #SpectrumAnalyzer #SpectrumAuctions #SpectrumDefense #SpectrumManagement #SpectrumThreats #StealthAntennas #STEMSkills #StrategicIndependence #TacticalRadio #TechnicalMastery #TechnicalStewardship #TelecommunicationsLobby #TitanicRadioHistory #transceiver #VHFUHF #VolunteerCorps #WavePropagation #WirelessPolicy #WirelessTelegraphy

Taming the Noise: Don Moore’s Simple, Cheap Filter Solution for Traveling DXers

https://swling.com/blog/2025/10/taming-the-noise-don-moores-simple-cheap-filter-solution-for-traveling-dxers/

#DonMoore #FightingQRM #GroundLoopIsolators #NoiseFilters #QRM #RadioFrequencyInterference #RFI

Protecting ALMA’s skies Whitepaper: a study of the risks posed by radio frequency interference (RFI) to ALMA today and in the near future, from both ground-based and space-based sources of radio emissions. The paper identifies the vulnerable points eof the observatory, and discusses and evaluates potential mitigation measures.

Announcement: https://www.almaobservatory.org/en/announcements/protecting-almas-skies/

Whitepaper: https://library.nrao.edu/public/memos/rfi/RFI_152.pdf

#ALMA #ALMAObservatory #RFI #darkskies #RadioFrequencyInterference #SatelliteConstellations

Well I finally managed to get a case opened about PG&E's ridiculous powerline RFI in our neighborhood. Their spew extends from 690kHz all the way to 54MHz and possibly beyond, with the strongest signal around 3536kHz.

I suspect what they have is effectively an accidental spark-gap transmitter. Not much range (about 200m) but inside that radius, a massive smothering of absolutely everything.

Someone is supposed to get back to me within 5 business days to troubleshoot it.

I guess given it's PG&E I should be grateful nothing is currently ablaze.

#HamRadio #RFI #RTFI #Interference #RadioFrequencyInterference #PGE

This is a worrying development: the impact of large satellite constellations, and of multiple ones of them will be strongly felt by radio astronomy…

https://www.orp-h2020.eu/observations-confirm-unintended-electromagnetic-radiation-emitting-large-satellite-constellations

#RadioAstronomy #LargeSatelliteConstelations #SatelliteRFI #RFI #RadioFrequencyInterference