Jump to navigation Jump to search This article is about the falling of meteors. A meteor shower NEAT Iota Alpha a celestial event in which a number of meteors are observed to radiate, or originate, from one point in the night sky.
The first great storm in the modern era was the Leonids of November 1833. Yeomans of the Jet Propulsion Laboratory reviewed the history of meteor showers for the Leonids and the history of the dynamic orbit of Comet Tempel-Tuttle. Reznikov of Kazan State University first correctly identified the years when dust was released which was responsible for several past Leonid meteor storms. In 1995, Peter Jenniskens predicted the 1995 Alpha Monocerotids outburst from dust trails. For this reason, the best viewing time for a meteor shower is generally slightly before dawn — a compromise between the maximum number of meteors available for viewing, and the lightening sky which makes them harder to see. Meteor showers are named after the nearest constellation or bright star with a Greek or Roman letter assigned that is close to the radiant position at the peak of the shower, whereby the grammatical declension of the Latin possessive form is replaced by “id” or “ids”. A meteor shower is the result of an interaction between a planet, such as Earth, and streams of debris from a comet.
Comets can produce debris by water vapor drag, as demonstrated by Fred Whipple in 1951, and by breakup. Each time a comet swings by the Sun in its orbit, some of its ice vaporizes and a certain amount of meteoroids will be shed. Recently, Peter Jenniskens has argued that most of our short-period meteor showers are not from the normal water vapor drag of active comets, but the product of infrequent disintegrations, when large chunks break off a mostly dormant comet. Shortly after Whipple predicted that dust particles travelled at low speeds relative to the comet, Milos Plavec was the first to offer the idea of a dust trail, when he calculated how meteoroids, once freed from the comet, would drift mostly in front of or behind the comet after completing one orbit. The gravitational pull of the planets determines where the dust trail would pass by Earth orbit, much like a gardener directing a hose to water a distant plant. Most years, those trails would miss the Earth altogether, but in some years the Earth is showered by meteors. Over longer periods of time, the dust trails can evolve in complicated ways.
This creates a shower component called a filament. A second effect is a close encounter with a planet. When the meteoroids collide with other meteoroids in the zodiacal cloud, they lose their stream association and become part of the “sporadic meteors” background. Long since dispersed from any stream or trail, they form isolated meteors, not a part of any shower. These random meteors will not appear to come from the radiant of the main shower.
The most visible meteor shower in most years are the Perseids, which peak on 12 August of each year at over one meteor per minute. NASA has a useful tool to calculate how many meteors per hour are visible from one’s observing location. The Leonid meteor shower peaks around 17 November of each year. Approximately every 33 years, the Leonid shower produces a meteor storm, peaking at rates of thousands of meteors per hour. Leonid storms gave birth to the term meteor shower when it was first realised that, during the November 1833 storm, the meteors radiated from near the star Gamma Leonis. Official names are given in the International Astronomical Union’s list of meteor showers.
Any other solar system body with a reasonably transparent atmosphere can also have meteor showers. As the Moon is in the neighborhood of Earth it can experience the same showers, but will have its own phenomena due to its lack of an atmosphere per se, such as vastly increasing its sodium tail. Many planets and moons have impact craters dating back large spans of time. But new craters, perhaps even related to meteor showers are possible.
Mars, and thus its moons, is known to have meteor showers. These have not been observed on other planets as yet but may be presumed to exist. Point in the sky from which meteors appear to originate. Meteor Showers and their Parent Comets. Observations on the Meteors of November 13th, 1833″.
The American Journal of Science and Arts. Facts respecting the Meteoric Phenomena of November 13th, 1834″. Comet Tempel-Tuttle and the Leonid meteors”. Tempel-Tuttle and the Leonid Meteors Archived 2007-06-30 at the Wayback Machine.
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Article published in 1997, notes prediction in 1995 – Jenniskens, P. The Detection of a Dust Trail in the Orbit of an Earth-threatening Long-Period Comet”. Archived 2007-03-07 at the Wayback Machine. Blast from the Past Armagh Observatory press release 1999 April 21st.
Royal Astronomical Society Press Notice Ref. IMCCE Prediction page Archived 2012-10-08 at the Wayback Machine. Physical Relations for Comets and Meteors”. Meteor outbursts ad the reflex motion of the Sun. The detection of a dust trail in the orbit of an Earth-threatening long-period comet. 2003 EH1 is the Quadrantid shower parent comet”. Haines, Lester, Meteor shower traced to 1490 comet break-up: Quadrantid mystery solved, The Register, January 8, 2008.
Monthly Notices of the Royal Astronomical Society: Letters. Origin of the Marsden and Kracht Groups of Sunskirting Comets. Minor Planet 2008 ED69 and the Kappa Cygnid Meteor Shower”. An Unusual Meteor Shower on 1 September 2007″. The Taurid complex meteor showers and asteroids”.
Contributions of the Astronomical Observatory Skalnaté Pleso. Biela and the Andromedids: Fragmenting versus Sublimating Comets”. Tuttle and the Unusual Outbursts of the Ursid Shower”. A possible meteor shower on the Moon”. Impact Vaporization as a Possible Source of Mercury’s Calcium Exosphere”.
Halley Stream: Meteor Showers on Earth, Venus and Mars, by Apoistolos A. Meteor showers on Titan: an example of why Twitter is awesome for scientists and the public”. Huygens lander was studied for its meteoric entry and an observation campaign was attempted: An Artificial meteor on Titan? 43, issue 5, October 2002, pp. Watching meteors on Triton Archived 2014-03-27 at the Wayback Machine.
IR Flashes induced by meteoroid impacts onto Pluto’s surface, by I. Wikimedia Commons has media related to Meteor showers. The other problem with small and cute is it’s hard for audiophiles to take the Neat Acoustics Iota Alpha seriously. Sound is a big deal at Neat Acoustics. The company’s test procedures revolve largely around critical listening by keen musician and Neat founder Bob Surgeoner, and his small team, of which many are gigging musicians in their own right. The sound of the Neat Iota Alpha is largely dictated by the size of the cabinet and the drivers in that cabinet. Iota Alpha cabinet is so small, it’s worth reiterating slowly and carefully.
11,000 worth of prizes in the main What Hi-Fi? Are you one of the lucky ones? If not good luck next year! Exhibitors 201989 brands currently confirmed exhibiting at the 2019 show. This list is correct at the current date, we are constantly updating the list as new bookings are made.
Click the brand name below for more information. Sign up to get updates from The Bristol Hi-Fi Show by email. 2018 Audio T All Rights Reserved. For many amateur radio stations are traditionally home based and associated with a table full of gear. However in recent years many have taken on the challenge of operating portable, away from home. A new generation of compact, full-featured, portable radios combines with modern battery technology to make it easier than ever to set up your station and enjoy amateur radio in the great outdoors. This book sets out to show what is possible and the fun to be had when operating portable.
With the increase in organised outdoor operating activities by clubs and award programmes such as SOTA, it’s no wonder that more radio amateurs have been inspired to venture into portable operations. Anyone can give portable operating a try and this book shows that portable operators use HF and VHF bands, as well as SSB, FM, CW, and digital modes. This book provides something for everyone, if you want to activate from a picnic table at a nearby park, or a remote summit, Portable Operating for Amateur Radio offers a wealth of practical information to help make your portable amateur radio operations successful. Now including popular modes FT8 and WSPR! The popularity of HF digital communications among Amateur Radio operators continues to grow rapidly. A few watts of RF power are all it takes to work the world – digitally! Written in an easy to understand style, this book will show you how to set up and operate your own HF digital station.
Fully updated, the second edition of Get on the Air with HF Digital is a step-by-step guide that’ll get you started in the fascinating world of HF digital technology. Starting with the basics of build your own an HF digital station there is advice on the essentials: the radio, the computer and the device that ties them together. Get on the Air with HF Digital provides readers with a practical advice on this fun and easy way to get on the air. If you want to start operating HF digital modes this is a great place to start. This is the extraordinary story of the little-known man who influenced every computer built, email sent, video streamed, and webpage loaded. He wrote the seminal text of the digital revolution, which has been called ‘the Magna Carta of the Information Age.
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His discoveries would lead contemporaries to compare him to Albert Einstein and Isaac Newton. Claude Shannon’s career stretched from the era of room-sized computers powered by gears and string to the age of Apple. His life shows us the beginnings of modern technology: in the ‘idea factory’ of Bell Labs, in the ‘scientists’ war’ with Nazi Germany, and in the work of Shannon’s collaborators and rivals, including Alan Turing. He also constructed customized unicycles, a flame throwing trumpet, outfoxed Vegas casinos and even built juggling robots. Written by best-selling amateur radio author Andrew Barron, ZL3DW this is the answer to everything you wanted to know about this exciting world of satellites. It covers the equipment you need, to track and use the amateur satellites and some of the satellite tracking software that is available.
Amsats and Hamsats, provides within its impressive 368 pages a great value guide to this stimulating and challenging area of amateur radio activity. If you want to get started or are already an experienced operator you will find something of value in these pages. Whatever the type of antenna, there is always a genuine sense of achievement when you build one yourself and it provides great results. This book sets out to provide a huge array of designs that the home constructor can attempt and more importantly will want to build. Unlike many other antenna books this book starts with the premise that it will provide all the information needed to construct the antenna so it is at your fingertips when you start. Broken into sections 60 Antennas provides designs from the simple to the complex but still achievable for the home constructor.
60 Antennas starts with a section on Vertical Antennas which includes antennas from 2-160m and even 630m. There is not enough space here to list all the antennas or their variations are included in 60 Antennas. Selected from around the amateur radio World and from some of the great names of antenna design there is much here that will inspire ‘You to want build! Although the fundamental characteristics of antennas apply to both transmission and reception, the requirements and priorities of receiving antennas can be vastly different from those of transmitting antennas. Receiving Antennas for the Radio Amateur focuses entirely on active and passive receiving antennas and their associated circuits. There are relatively few cases where a radio amateur cannot benefit from a separate, well-designed receiving antenna or antenna system. The active antenna holds a prominent position in Receiving Antennas for the Radio Amateur, as it offers good receiving performance while taking up minimal space.
RF operational amplifiers, have made a number of previously difficult-to-implement active antenna designs a very simple task. If you are looking to maximise your receive capabilities, this book provides the ideal guide to this topic and is a must for every radio amateur’s bookshelf. From drone warfare in the Middle East to digital spying, today’s governments have harnessed the power of cutting-edge technology to awesome effect. But what happens when ordinary people have the same tools at their fingertips?
Advances in cyber technology, biotechnology and robotics mean that more people than ever before have access to potentially dangerous technologies – from drones to computer networks and biological agents – which could be used to attack states and private citizens alike. The way that technology is changing the threat landscape starkly highlights the importance of public policy in a way we have never seen before. The Future of Violence starts with the exciting “what if” stuff from assassinations by remote control spiders through to drones attacking sporting venues. The book goes onto explore the historical underpinnings that have led us to where we are today.
Many are aware of the spying activity that took place following WWII until the demise of the Soviet Union in 1991. Few though are aware of the radio jamming, broadcasts of encrypted messages or any of the other electronic skulduggery that took place during this time. This book shines a light on these activities that range from the extraordinary to the most mundane but most disruptive imaginable. Readers of The Voices will find the details of the radio warfare engaged in the Americans, Soviets and British along with a number of other countries and groups from the Middle-East to the Caribbean.
You will find details of the author’s first experiences of radio jamming that lead to his deep fascination as to what was going happening on the airwaves at this time. There is discussion of the activities of propaganda stations such as Radio Marti, Radio Liberty, Radio Free Europe and many others. This book has edited from those articles and expanded with new pictures and small amounts of material omitted from that series. The Voices book is a truly eye-opening read for those who are unaware of this part of our history. It is simply thoroughly recommended reading for those interested in the Cold War and the radio warfare that took place in the latter part of the 20th Century. Many radio amateurs love to design and construct electronic projects from the very simple right through to the very complex.
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You will find projects as diverse as antennas, simple test equipment through to 70cm handhelds and much besides. Filters, Morse, Antennas and large section covering useful station accessories, peripherals and other diverse projects. The projects included range from complex DIY antenna analysers through to a simple electronic keyer and builds on simple strip board. There are two transceivers that you can build alongside antennas for bands from Microwaves to HF.
All the projects included in 50 Projects for Radio Amateurs are selected to stimulate and inspire you to get out the soldering iron and get building the array of useful tools, interesting antennas and much more that are included in the book. Thoroughly recommended reading for any level of amateur radio constructor. Ham Radio: Where Hands-On Lives On! ARRL’s ‘Hands-On Radio’ column published in their magazine QST from 2013-2017. As usual the book provides you through a host of basic electronics experiments, designed to increase your understanding of radio fundamentals, components, circuits and design.
Readers will find ARRL’s Hands-On Radio Experiments – Volume 3 the book broken down into eight different sections covering an array of topics. You will find sections covering experiments to get the best out of antennas and another on transmission lines and impedance matching. You will also find sections on electronic circuitry, electronic components and electronic fundamentals. Other sections included cover Tests and Test Equipment, RF Techniques and Practical Station Practices. As the title of this book suggests it is about putting our hands on radios and there will be new things to learn and techniques to try – ARRL’s Hands-On Radio Experiments – Volume 3 brings you these and is recommended reading for everyone interested in practical ‘Hands-On’ amateur radio experimenting.
Technical Features, 25 Antenna Features,15 Equipment Reviews and over 85 other Feature articles. The equipment reviews covered equipment releases such as the Elecraft KX2, Yaesu FT-891 and SDR equipment such as ANAN-8000DLE, SDRplay and much more. Practical advice about antennas, transmission lines, and more! If you have not yet discovered the regular The Doctor is In column in the ARRL magazine QST then this book is a revelation. Written in a question and answer format the column dispenses practical answers troublesome problems, myth busting and great ideas covering a range of topics. The ARRL’s Best of The Doctor is In distils more than a decade of the advice and ideas of Joel Hallas, W1ZR covering as it says in the sub title antennas, transmission lines and more.
UHF Antennas, HF Wire Antennas, HF Vertical Antennas, HF Yagi Antennas and Transmission Lines. Each question is treated to an answer written an eminently readable form that informs, provokes and stimulates. If you’re puzzling over how to improve your station antennas, or solve a problem with your antenna system, chances are someone else has shared the same questions with – and received helpful answers from – The Doctor. Having ARRL’s Best of The Doctor is In at hand is the next best thing to a visit from W1ZR himself! Software Defined Radio sets out to explain the basics without getting to technical and is written to help you too get the most out of your SDR. It will even help you decide what to buy. Written by New Zealand based and acknowledged SDR expert Andrew Barron, ZL3DW, Software Defined Radio covers a huge range of material.
The use of SDR by radio amateurs is growing rapidly in popularity as they become aware of the great features and performance on offer. Not only does this book cover how SDR works there are details the different types of software that are available, what is different about them and even what is better. Software Defined Radio is intended for radio amateurs, short wave listeners or anyone interested in radio technology. If you are interested in the technology of what was once, the domain of a few dedicated hackers and experimenters, the future of this exciting and fast developing area of radio or simply want to buy a SDR radio, this book is thoroughly recommended reading. In 1933 the Admiralty banned ‘Blinker’ Hall from publishing his autobiography and for those that know the story of Room 40 code breaking, a fore runner to Bletchley Park this is not a surprise, but here, for the first time, A Clear Case of Genius presents his story in his own words. From the chapters that have survived from his autobiography you can now read what the renowned spymaster had to say about the British Naval Intelligence – the pinnacle of the world’s secret intelligence services. He explores the function of secret intelligence in wartime, censorship and subterfuge.
A Clear Case of Genius is not only the original autobiography but has extensive supporting explanatory text and images from well-known author Philip Vickers. Renowned author and expert, Nigel West also provides a foreword that sets the book in its true historical context. Presented in a hardback format A Clear Case of Genius provides a unique insight into the thinking of one of Britain’s pioneering intelligence leaders and a fascinating insight into code breaking before Bletchley Park came into existence. This new book by John Fielding, ZS5JF, is for everyone who uses – or is considering using – an HF or VHF linear amplifier. While some amateurs may be of the opinion that valves are an obsolete technology and semiconductors are a better way, John Fielding very definitely thinks otherwise!
After reading this book you will be under no illusions that, in his opinion, valves are far superior to semiconductor devices for most linear amplifier applications. Essential reading for anyone building a valve linear amplifier, the author guides the reader through the choice of valves for various purposes. Valve Amplifiers Explained starts with a chapter on basic valve theory and explains how to interpret valve characteristic curves. The various classes of operation of amplifiers – Class A, Class B, Class AB1, Class AB2 and Class C – are all covered in detail. There is advice too for those who, instead of building an amplifier, are considering purchasing a commercially-made linear.
Those who use commercial linear amplifiers and want to understand more about how they work will not be disappointed. As John says, “There is a certain aura about valve equipment. The glowing filaments and the gentle buzz of a high voltage power supply are a sort of magic few have had the pleasure of knowing. After reading Valve Amplifiers Explained you will want to join that elite few! Every few years the ARRL Handbook for Radio Communications undergoes a major update. The 2018 edition is one of these editions. Grounding and Bonding, Solar Cycle 24-25, Tower Safety, and Building Remote-Control Stations to mention but a few.
Microwave Filters and Transmission Lines, Software-Controlled and Manual Preselectors for 1. UHF Mobile Antenna, Off-Center End-Fed Portable 40-6 Meter Antenna, Crossed-Dipole Omnidirectional Antenna for 1296 MHz, Spudgun Antenna Launcher and CW Reception Filters. This 95th edition of the ARRL Handbook continues to be a cornerstone of radio experimentation, discovery, and achievement. This book covers a wealth of key information: Radio electronics theory and principles, Radio signal transmission and propagation, Digital modulation and protocols, Antennas and transmission lines, Construction practices and lots of other useful reference information.
Antennas for MF and Above is a practical guide to antennas for the relatively new 630m band, 160m, 80m and equally new 60m band. This book is aimed at the constructor, or those who are curious to understand in further detail the theoretical aspects of the antenna techniques used on these bands. Rather than concentrating on single bands, Mike shows how you can often use the same approach or even the same antenna to work two or more bands. There are examples of how a 160m antenna can be pressed into service on 630m or even 80m ones that can be made to work on 160 and 60m.
You will find examples of single band and multi-band working designs for both vertical and horizontally polarised antennas. There are explanations of the operation of antennas with radiation pattern diagrams used to help with understanding the concepts introduced. You will also find practical techniques for matching the antenna to the transmission line are covered using examples of baluns, transformers and ATUs to illustrate these methods. If you are interested in experimenting with the bands below 40m, you are sure to find much to interest you in this book. Antennas for MF and Above is without doubt one of amateur radio’s standard reference works and THE practical guide for everyone interested in antennas for the amateur bands from 630m to 60m. More calls than ever before and a new lower price too!
There are more UK and Ireland callsigns on issue than ever and they are all included in the RSGB Yearbook 2018. With thousands of changes and updates included this book contains the very latest details available of over 87,500 UK and Irish Republic callsigns in its massive 544 pages. Not only does the RSGB Yearbook 2018 remain the latest callsign information available for the UK but it is also the most comprehensive guide to amateur radio in the UK and worldwide. You will find over 170 pages of invaluable reference material for just about everything you are ever likely to want to know about amateur radio.
There is all the latest information on every aspect of the RSGB from how the Society is organised, the services it offers, committees, who to contact for assistance, etc. The RSGB Yearbook 2018 is as always much more than a simple list of callsigns and if you haven’t purchased a copy in a while the updated information is an essential for every well-equipped shack. As many will know the Callseeker Plus 2018 is the electronic version of the RSGB Yearbook 2018 and much, much more. Now not only can you run this software direct from either a CD or Memory stick on your PC you can also run it with a Raspberry Pi.
As always Callseeker Plus 2018 provides the latest UK and Republic of Ireland callsign data but as a bonus you also get call information from 9A, DL, EA, ES, F, HA, HB9, I, LX, LY, OE, OH, ON, OZ, SM, SP, SV and Z3 as well. All this takes up no computer hard disc space as it runs straight from the CD or memory stick, it is really easy to use and. You can search by callsign, name or location and navigating through the search results is quick and easy. Callseeker Plus 2018 also boasts a host of “extras” from across Europe, including the RSGB Yearbook 2018 reference information pages in an easily searchable PDF format providing the very latest amateur radio reference information from the UK and around the World.
The Callseeker Plus 2018 is available as either a traditional CD ROM or an USB Memory Stick version. The CD is in the full jewel case whilst the memory stick is encased an Eco bamboo shell. Both are highly portable and easy to use and provide a great alternative to the traditional RSGB Yearbook. Callseeker Plus 2018 cheaper than a RSGB Yearbook 2018 and with more callsigns -what a bargain! Looking back over old log books can bring back memories of old friends, satisfying and challenging QSOs. For many there is nothing like it and even today nothing sits better on the bench of an amateur radio shack than a well maintained log book.
Diary 2018 provides an ideal solution. This logbook isn’t just somewhere to note your QSLs but much more. This hugely popular annual logbook contains a wealth of extra material just where you want it, when you want it, right at your fingertips in your shack. Diary 2018 contains the latest UK Band plans, RSGB Contest Calendar, DXCC prefix list and RSGB QSL Bureau information.
Show your support of the IOTA programme with these great mugs. These high quality ceramic mugs are dishwasher safe, microwaveable and have a generous 375ml capacity. The full colour sunset graphic is a limited edition and only 100 mugs will ever be made so buy your mug whilst stock is available. We believe it takes more than fine coffee beans to make the perfect cup of coffee.
It’s about creating an experience these stylish coffee mugs not only look great but are the essential accessory for everyone who supports the Islands on the Air programme. Treat yourself to an IOTA Mug, you deserve it. NOTE: All proceeds from the sale of IOTA merchandise goes directly to support the programme. R Bulletin have been published since 1925. This brand new volume of our archive discs covers the years 1925 to 1939. This period covered the huge developments in the science and practice of amateur radio. Presented in the easy to use PDF format there are thousands of pages here covering the equipment construction, antennas, operating reports, new techniques and even the social aspects of the 1920s and 30s.
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Completing the RSGB archive this DVD provides a unique insight into the early days of the RSGB, amateur radio and is absolutely fascinating reading for anyone. Proper Station Grounding is important and this ARRL book sets out to explain how to do it safely. This book is specifically aimed at US radio amateurs and provides an intriguing insight into a different electrical system even if it absolutely shouldn’t be used as a guide to UK regulations and methods. ARRL Grounding and Bonding for the Radio Amateur provides information on AC safety in the US and their National Electrical Code but there is much more.
Many parts are useful regardless of supply differences and you will find fascinating information on for example lightning protection. If you are interested in different electrical standards and how they affect station management across the globe ARRL Grounding and Bonding for the Radio Amateur provides a hugely interesting read. European electrical regulations and thereby may be illegal or deemed dangerous in these areas. Building on the success of the original ARRL book Arduino for Ham Radio, this book More Arduino Projects for Ham Radio includes 15 completely new practical and functional Arduino projects for ham radio. This book branches out to use some of the newer Arduino variants and devices. Each project is complete and functional but room has been left for you to add personal touches and enhancements.
More Arduino Projects for Ham Radio builds a solid foundation through descriptions of the many new Arduino boards and add-on components, followed by a collection of practical ham radio projects. Readers will find a wide variety of applications with projects including Wireless Remote Coax Switch, Yaesu Rotator Controller, Antenna SWR Analyser, two 40 Meter QRP Transceivers and much more. There is something in More Arduino Projects for Ham Radio for everyone interested in Arduino. This is thoroughly recommended reading for beginners or a seasoned programmer alike. These Callsign mugs are full size at 300ml mugs 96x82mm.
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They are the stylish Durham style and are finished in a bright white glossy finish. There are three designs available and they all feature the RSGB logo and your callsign. It’s about creating an experience these stylish coffee mugs not only look great but are the essential accessory for the discerning amateur’s shack. For over 30 years Lee Marsland has been a licensed radio amateur. In that time and in ‘his own words’, there have been plenty of ‘trials and tribulations’. Lee brings to this book a light hearted look at how his hobby has become more of a way of life that defines him today.
Guilds through how he gained his Morse certificate, set up his stations, erected towers and even in more recent times encouraged his grandchildren to take and pass their own amateur radio examinations. The book is full of humorous anecdotes from Lee’s life including the tale of the title which concerns RSPCA officer taking Lee to task about cruelty to his owl despite it being made of plastic. Lee has written this book in an easy to read style that really brings over his Liverpool heritage. His tale of becoming a radio amateur and its challenges is a great read that provides many a chuckle.
For the active hillwalker and the home based chaser of summits alike this programme offers endless fascination. SOTA Explained sets out to provide the essential guide to this programme, hilltop radio and much more besides. Taking a portable radio station into the hills and operating from a summit is a fascinating and rewarding way to combine the very best aspects of walking and of amateur radio. SOTA activity is also inexpensive providing the opportunity to achieve a great deal in amateur radio. Many appreciate the freedom this sort of operation offers and the benefits of having a high radio station far from urban electrical interference. SOTA Explained also provides advice for those who do not venture on to the hills but still want to participate in SOTA.
There is a whole chapter dedicated to ‘chasers’ from the bands to choose, how propagation affects your operation, chasing DX stations and rare SOTA activations. SOTA stations and modes of operation. The book is not just for those new to SOTA but the more experienced operator will find much of use too. Be warned: after reading this book, you will never see a hilltop in the same way again. One of the little known museums of the UK is the Military Intelligence Museum at Chicksands in Bedfordshire. This museum provides a huge insight into British intelligence activity since Wellington’s time and this new book provides a unique look at its fascinating collection. Through a mix of objects, medals, photographs and documents held in the Military Intelligence Museum, the book tells the story of British military intelligence across the years, moving from its earliest object of the Waterloo medal awarded to the Duke of Wellington’s senior intelligence officer to items recovered from operations in Afghanistan.