# johndraper.us

> Get your own Cap'n Crunch Whistle


## Posts

- [Understanding Ionosonde and GPS TEC Maps: Tools for HF Propagation Mastery](https://johndraper.us/hf-propagation-ionosonde-gps-tec-maps/): For HAM radio operators, reliable communication—especially on HF bands—depends heavily on the state of the ionosphere. The ability to predict or analyze ionospheric conditions can make or break a QSO, especially during contests or emergency communication scenarios. Two advanced tools are at the forefront of ionospheric science: Ionosonde data and GPS TEC (Total Electron Content) maps. These technologies not only empower amateur operators with real-time propagation insight but also enhance preparedness for space weather anomalies. The Ionosphere: A Brief Recap The ionosphere is the region of Earth’s upper atmosphere—roughly 60 to 1,000 km above the surface—where solar radiation ionizes atoms […]
- [John Draper | Cap’n Crunch | Tech Pioneer & HAM Radio Legend](https://johndraper.us/john-draper-capn-crunch-tech-pioneer-ham-radio-legend/): Welcome to the Official Site of John Draper aka Cap’n Crunch Slowly but surely,   I’m getting my Prepping act together.   I got my Ham general class license call sign KK7YQS (Yankee, Queen Sierra).   I have a Yeasu 991A able to use 80 meters – 6 meters,  and also 2 meters – ¾ meters.  By the way,   I’m on 40 meter ham band in the afternoon,  and I talk to a lot of hams in Calif.    I’ve also got six MeshTastic devices I’m giving out to my local friends,   enabling grid free comms so I […]
- [Newsletter #2 February 2025: Prepping Journey: HAM Radio, Off-Grid Power & Tech Exploration](https://johndraper.us/prepping-ham-radio-offgrid-tech/): Slowly but surely, I’m getting my Prepping act together. I got my Ham general class license call sign KK7YQS (Yankee, Queen Sierra). I have a Yeasu 991A able to use 80 meters – 6 meters,  and also 2 meters – ¾ meters. By the way, I’m on 40 meter ham band in the afternoon, and I talk to a lot of hams in Calif. I’ve also got six MeshTastic devices I’m giving out to my local friends,   enabling grid free comms so I can communicate without the internet,  or a HAM license. With my HackRF software defined radio, I […]
- [What is Phone Phreaking and How Did it Start?](https://johndraper.us/phone-phreaking-history/): Imagine a time when phones weren’t smart, the internet was a sci-fi dream, and long-distance calls were so expensive they felt like luxuries reserved for millionaires. In the midst of this analog era, a group of ingenious rebels discovered they could outsmart the global telephone system—and they called it phone phreaking. At the forefront of this revolution was John Draper, also known as “Captain Crunch,” a hacker whose innovations laid the groundwork for everything from cybersecurity to Silicon Valley itself. What is Phone Phreaking? Phone phreaking was the art of exploiting the vulnerabilities of the old-school telephone system to make […]
- [Who is John Draper? A Legendary Hacker's Story](https://johndraper.us/who-is-john-draper-a-legendary-hackers-story/): In the world of hacking, few names echo louder than John Draper. Known by his alias “Captain Crunch,” Draper is a figure who has bridged the gap between the rebellious origins of hacking and the technological marvels of today. If you’ve ever watched Mr. Robot and marveled at the ingenuity of Elliot Alderson, or cheered for Lisbeth Salander in The Girl with the Dragon Tattoo, you’re already familiar with the spirit of Draper’s legacy—a mix of curiosity, audacity, and brilliance. The Origin Story: A Captain Crunch Beginning John Draper didn’t set out to become a hacker; he simply loved solving […]

## Pages

- [Sunspot Activity and Solar Wind: The Sun’s Influence on HF Radio Propagation](https://johndraper.us/sunspots-solar-wind-hf-radio/): For amateur radio operators, few factors are as influential—or as unpredictable—as our Sun. When it comes to high-frequency (HF) radio propagation, the Sun is both ally and adversary. It can open up bands for global DX with crystal-clear signals or plunge entire frequencies into noisy chaos. Understanding sunspot activity and the solar wind is vital for anyone relying on the ionosphere to reflect their signal across continents. This article explores how solar activity drives ionospheric conditions, how HAMs can monitor it in real-time, and what it means for your operations on bands like 40, 20, 15, or even 10 meters. […]
- [Ground Truth from SDR Networks and User Reports: Real-Time Eyes on the Bands](https://johndraper.us/hf-ground-truth-sdr-user-reports/): In the complex and often unpredictable world of HF radio propagation, theory alone isn’t enough. While tools like VOACAP and ionospheric models are indispensable for forecasting, they can’t always account for the ever-shifting variables in real-time space weather, noise levels, and signal interference. That’s where “ground truth” comes in—real, observable, field-tested data collected directly from Software-Defined Radio (SDR) networks and user-generated reports. For amateur radio operators, these data sources serve as a vital bridge between propagation theory and operational reality, providing the most reliable view into what’s actually being heard—and where. What Is Ground Truth? In scientific terms, ground truth […]
- [Solar Flux Index (SFI): A Key Space Weather Indicator for HF Radio Users](https://johndraper.us/solar-flux-index-sfi/): Introduction: The Solar Flux Index (SFI) is a fundamental measure in space weather, especially vital for those who rely on HF radio communications – from amateur radio operators seeking long-distance contacts to survivalists and military communicators planning reliable links. SFI represents the intensity of solar radio emissions at a wavelength of 10.7 cm (frequency ~2800 MHz) . In practical terms, it gauges how much solar energy is reaching Earth’s upper atmosphere, which in turn affects the ionosphere and HF radio propagation. This article provides a detailed look at what SFI is, how it’s measured, how it influences HF band conditions, […]
- [The WaveWatch Project](https://johndraper.us/the-wavewatch-project/): WaveWatch Project: Predicting Radio Propagation with AI Welcome to the future of radio wave analysis. WaveWatch is a cutting-edge AI-powered platform built to forecast radio wave propagation across the globe. Whether you’re a ham radio operator, telecom engineer, emergency responder, or shortwave enthusiast, WaveWatch delivers real-time insights you can rely on. 🔍 What Is WaveWatch? WaveWatch is an artificial intelligence system trained to interpret ionospheric data, solar activity, geomagnetic indices, and real-world user reports to predict how radio signals will travel—from HF to VHF and beyond. Using neural networks, WaveWatch recognizes propagation patterns traditional models often miss. It’s not just […]
- [Online Classes - Learn from the Cap'n](https://johndraper.us/online-classes/): Welcome to John Draper’s Online Classes—your gateway to learning from a true tech legend. Whether you’re curious about ethical hacking, want to explore the world of HAM radio, or build your own solar-powered setups, these courses are crafted to be hands-on, practical, and rooted in decades of real-world experience. Join a growing community of tech explorers and learn directly from Captain Crunch himself—because hacking is more than code; it’s a mindset. Sign Up Form – > One Online Class is now available: Learning to program with AI – By John Draper, AKA Cap’n Crunch
- [Technology with John Draper](https://johndraper.us/john-draper-tech-hub/): Welcome to the Technology hub of John Draper, aka “Captain Crunch”—legendary hacker, innovator, and lifelong tinkerer. This section of the site dives into the tools, skills, and systems John has explored, modified, and often pushed to the limits. Whether it’s pioneering communication systems off-grid or teaching the next generation how to bend code to their will, John’s passion for technology continues to inspire and educate. Explore John’s Tech Interests: 🔊 HAM Radio John’s lifeline to the world. Discover how he uses amateur radio to communicate globally, contribute during emergencies, and experiment with custom signal setups. 📚 Online Courses Learn directly […]
- [HAM Radio: A Global Lifeline for Communication](https://johndraper.us/ham-radio-global-communication-guide/): HAM radio, also known as amateur radio, is a licensed hobby and vital communication tool that allows individuals to transmit voice, digital, and Morse code messages across town or around the world — without relying on the internet or cellular networks. Licensed operators use specific radio frequencies allocated by governments to communicate with one another, assist in emergencies, and experiment with radio technology. Unlike CB or GMRS radio, HAM radio requires passing a license exam to ensure users understand radio theory, regulations, and proper operating procedures. People pursue HAM radio for many reasons: it’s a rewarding technical hobby, a critical […]
- [August Newsletter](https://johndraper.us/capn-crunch-august-2025-newsletter/): Hello friends, This past month I’ve been deep into research, studying, and development on my WaveWatch application. While I haven’t spent much time on ham radio or on the airwaves, I’ve been following the growing excitement around Meshtastic, which continues to capture my interest. I’ve also been fascinated by recent astronomical events such as 3I/Alpha and other space-related discoveries. As always, separating real news from misinformation can be a challenge — and it’s frustrating when valuable information gets locked behind government security classifications, making it difficult for the public to understand what’s truly happening. ⸻ Technology & Tools On the […]
- [July Newsletter](https://johndraper.us/capn-crunchs-newsletter-july-2025/): Hello everyone, First, I want to thank you for your patience — this month’s newsletter is running a little late. Between ongoing medical challenges and unexpected expenses, it’s been a hectic time. To help cover these costs, I’m keeping my GoFundMe open until I reach my goal: https://gofund.me/9a25c0b9a. I’m getting closer to the $25,000 target, but rising pharmacy prices continue to strain my finances. If you’re able, any contribution through the link above would mean a lot. Support My Work The number of YouTube videos I can release is closely tied to the support I receive on Patreon. If you […]
- [Cap'n Crunch's Newsletter #5 - June 2025](https://johndraper.us/ham-radio-recovery-setup/): Hi everyone, Lots happening this month – from discovering a useful AI tool to dealing with desert storms and working on some fun projects. Here’s what’s been going on: Found Something Useful: Magai.co I stumbled across this site that might interest those of you who use AI tools. It’s called Magai.co, and for $20 a month, you get access to a whole bunch of different AI models – ChatGPT, Claude, DeepSeek, and others. The neat thing is it picks which AI to use based on what you’re asking. Just thought I’d pass it along in case anyone finds it helpful. […]
- [May 2025 Newsletter](https://johndraper.us/capn-crunchs-newsletter-4-may-2025/): This month, I began working on a new project called WaveWatch — an AI-powered app designed to predict shortwave radio propagation. It’s being developed as an open-source tool using Cursor, a powerful, AI-enhanced coding environment built on top of Visual Studio Code (VSCode), Microsoft’s popular IDE. There are a lot of YouTube videos about this amazing tool.   If you are a pro programmer,  or just learning,   this is the way to go. WaveWatch is intended to be beginner-friendly, and I’m planning to create a video walkthrough showing just how accessible software development can be — even for those […]
- [Cap'n Crunch's Newsletter #3 - April 2025](https://johndraper.us/capn-crunchs-newsletter-3-april-2025/): 🚀  “Back on the Air: Reclaiming My Voice Through HAM Radio” A few weeks ago, I had a serious health scare—completely unresponsive. My hosts rushed to call 911, and I was taken to the hospital where I was diagnosed with pneumonia. I pulled through after a full battery of tests and enough antibiotics to knock out an elephant. But after six days, they tried to put me in a nursing home. No thanks. I came home—to my true home—with people who treat me like family. While I’m still recovering and much weaker, I’m getting stronger every day. And I’m back […]
- [Newsletter #2 - Cap'n Crunch April 2025](https://johndraper.us/newsletter-2-capn-crunch-january-2025/): Hello Friends I’m excited to share my second newsletter with you! Pneumonia A few weeks ago,  I was unresponsive.   My hosts called 911 and I was taken to the hospital.   They determined I had pneumonia.   They ran me through a whole barrage of tests.   Eventually,  I recovered after getting pumped with antibiotics.  I had 3 other issues,  and was able to address each one,  but after about 6 days,  they wanted to put me in a nursing home,  but I’ll have no part of that.  My current living condition,   I consider it “home”,  because I’m […]
- [Newsletter #1 - Cap'n Crunch January 2025](https://johndraper.us/newsletter-1-capn-crunch-january-2025/): Hello Friends I’m excited to share my very first newsletter with you! This marks a pivotal moment in how I engage with my audience through both my website and YouTube channel. The newsletter will serve as a space to share ideas, stories, and features I’m planning to introduce on my channel. While the content on YouTube will often overlap with the newsletter, it’ll be presented in a different format to suit the platform. And since writing isn’t my strong suit, I’ve enlisted Stacy, my trusty AI, to help me organize my thoughts. Exploring New Stories and Technical Narratives   I’ve […]
- [Cap'n Crunch's Newsletter!](https://johndraper.us/capn-crunchs-newsletter/): Every so often, a newsletter will be produced by the Cap’n, and when it does, it will end up here. Newsletter #1 January 2025 Newsletter #2 February 2025 Newsletter #3 April 2025 Newsletter #4 May 2025  Newsletter #5 June 2025 Newsletter #6 July 2025  Newsletter #7 August 2025 Please sign up for my newsletter to be sure to get them when they go out!
- [John's Bio](https://johndraper.us/johns-bio/): Biography Page: The Life of John Draper – aka Captain Crunch Early Life and Background John Draper, born in 1943, grew up fascinated by electronics and the emerging world of telecommunications. As a young boy, John’s curiosity about how things worked led him to dismantle radios and tinker with electronics, laying the foundation for what would become a groundbreaking, yet controversial career in the tech world. His passion for finding out how systems functioned ignited what would later become his deep involvement in the world of phone phreaking—the precursor to modern hacking. PHONE PHREAKING: THE CAPTAIN CRUNCH STORY John Draper […]
- [Public Appearances by John Draper, AKA 'Captain Crunch'](https://johndraper.us/public-appearances-by-john-draper-aka-captain-crunch/): John demonstrating how he used the blue Cap’n Crunch Whistles to “Phreak The Phone Lines”. Due to physical constraints, John Draper will no longer be making in person appearances, however is available virtually via video. Please use this contact form to make arrangements John Draper, also known as “Captain Crunch,” is a notable figure in the hacking and cybersecurity communities. Below is a chronological timeline of his significant public engagements and contributions: Date Event Details 1971 Esquire Magazine Feature Journalist Ron Rosenbaum’s article “Secrets of the Little Blue Box” profiled Draper’s phone phreaking activities, bringing him significant attention Wikipedia 1972 Collaboration with […]
- [Podcasts - List](https://johndraper.us/podcasts-list/): Crunchman on the Musician’s Insider with Aaron Kronis November 21, 2024 Aaron Getting Interview In this video, I had the pleasure of interviewing my best friend, Aaron Getting, who has made a profound impact on my life and introduced me to some incredible opportunities. Aaron is[…] September 14, 2018 Download John Draper, widely known as “Captain Crunch,” has been featured in several podcasts where he shares his experiences and insights into the early days of hacking and computing. Below is a compiled list of notable podcast appearances, including titles, descriptions, and URLs: Title Description URL Modem Mischief: John Draper aka […]
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- [Contact](https://johndraper.us/contact-john/): Contact John Your Name (required) Your Email (required) Subject Your Message Contact John Draper – How You Can Help Captain Crunch John Draper, also known as Captain Crunch, has been a pioneer in electronics and hacking since the early 1960s. Over the years, John has built and repaired countless amplifiers, transmitters, and other electronics, sharing his expertise and passion with the world. However, as technology has evolved, finding the components needed to continue this work has become increasingly difficult. We’re reaching out to the community to help preserve this legacy. How You Can Help If you have access to or […]
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- [Music - 2 Columns](https://johndraper.us/music-2-columns/): 2017 Horizon Herbalizer listen   2017 Somera DJ Sonaar listen   2017 Moodburst Wyclef listen   2017 Lights Out Raymayor listen   2017 Colorun Ultrasonic listen   2017 Phoenix Maskatomb listen   2017 Dust to Play Herbalizer listen   2017 Prodigy Lyrics Herbalizer listen   2018 A SoundCloud Album Diamond listen   2018 A Spotify Album Diamond listen  
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- [Videos](https://johndraper.us/video-youtube-channel/): John Draper [AKA Cap’n Crunch] Videos https://www.youtube.com/watch?v=UAc-RwvYJRchttps://www.youtube.com/watch?v=tKos3Gnk-9Qhttps://www.youtube.com/watch?v=bta9bGQH2nw Video: Phone Phreak Cap’n Crunch – Rare Interview & Video: JOhn T. Draper: Captain Crunch History https://www.youtube.com/watch?v=n6TjjE8NHV0https://www.youtube.com/watch?v=DK-352AWaKk Scene World: John Draper (Captain Crunch) Interview & Meet the First Hacker in History also Known as Captain Crunch https://www.youtube.com/watch?v=Abko9Rvta3Qhttps://www.youtube.com/watch?v=skAXb2GCoSw
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- [Music - List](https://johndraper.us/music-list/): Horizon Release date: 2017 Available now on: iTunes Spotify SoundCloud Amazon Buy Online Horizon Somera Release date: 2017 Available now on: iTunes Spotify SoundCloud Amazon Buy Online Somera Moodburst Release date: 2017 Available now on: iTunes Spotify SoundCloud Amazon Buy Online Moodburst
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- [Presskit](https://johndraper.us/presskit/): MY LATEST EPISODES ABOUT ME It never ends Passion never die. It grows Stay Hungry and Strong Lorem ipsum dolor sit amet, consectetur adipiscing elit. Ut malesuada vitae nulla sit amet blandit. Pellentesque sit amet interdum diam. In non arcu non dolor iac ulis tincidunt id ac mauris. Donec vulputate tortor lorem. Suspendisse gravida mattis leo. Suspendisse potenti. Fusce finibus magna sit amet malesuada lobortis. Etiam in consequat augue, ac faucibus massa. Nullam commodo libero sit amet dictum mattis. Donec facilisis pretium risus, semper vehicula magna convallis nec. Contact Us LATEST VIDEO https://www.youtube.com/watch?v=9uOETcuFjbE PHOTOS Download THE PRESS KIT PHOTOS – […]
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- [Donate](https://johndraper.us/donate/): Donate & Support Support John Draper – The Crunchman Legacy Lives On John Draper, known to many as Captain Crunch, has inspired generations with his ingenuity, resilience, and trailblazing spirit. Your support helps John continue to share his story, educate future generations, and sustain his legacy as a pioneer in technology and culture. Every contribution, no matter the size, makes a meaningful difference. Ways to Contribute 1. Join John’s Patreon Community Be part of an exclusive community supporting John’s ongoing projects, insights, and updates. As a patron, you’ll gain access to unique content and the chance to directly connect with […]
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- [Home](https://johndraper.us/): Hi, I’m John Draper. Welcome to my website. Now you can Get my Book! Finally. Get In Touch Here via webform Read this month’s Newsletter You can Support John “Cap’n Crunch” Draper via Patreon Copyright John Draper 2025

## Products

- [Beyond The Little Blue Box - Soft Cover Book](https://johndraper.us/product/beyond-the-little-blue-box-soft-cover-book/): Beyond the Little Blue Box The Official Collector’s Edition by John “Captain Crunch” Draper “This isn’t just a book—it’s a transmission from the source.” – John Draper 🔍 Overview Step into the mind of one of the most legendary figures in hacker history. Beyond the Little Blue Box is a raw, unfiltered account of John Draper’s life—from the whistle that changed telecom forever to the underground networks that helped shape Silicon Valley. This collector’s edition includes never-before-seen stories, rare photos, and insights only Captain Crunch can deliver. Whether you’re a cybersecurity buff, a hacker culture historian, or someone who just […]


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