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Hf Antennas For All Locations Moxon Pdf

Moxon Antenna Overview

The Moxon antenna, also known as the Moxon rectangle or Moxon design, is a type of HF (shortwave) antenna that consists of two parallel elements, typically made of wire or tubing, connected at their ends to form a rectangle. It's a popular antenna design for amateur radio operators and shortwave listeners due to its simplicity, compactness, and relatively good performance.

Advantages and Applications

The Moxon antenna has several advantages:

1. Compact design: Moxon antennas are relatively small, making them suitable for limited spaces, such as backyards, balconies, or even indoor installations.
2. Easy to build: The design is simple, and the antenna can be constructed with minimal materials and expertise.
3. Good gain and directivity: Moxon antennas have a moderate gain (around 6-9 dB) and a relatively broad beamwidth, making them suitable for DX (long-distance) communications.

Considerations for Different Locations

When installing a Moxon antenna, consider the following factors to optimize its performance:

1. Height: The antenna should be installed at a reasonable height above ground to minimize losses and optimize radiation patterns.
2. Surroundings: Nearby objects, such as buildings, trees, or power lines, can impact the antenna's performance and radiation pattern.
3. Noise and interference: In areas with high levels of noise or interference, the Moxon antenna's design may not be optimal.

PDF Paper: "The Moxon Antenna" by VK5BRB

A comprehensive paper on Moxon antennas is "The Moxon Antenna" by Brian, VK5BRB (now VK5BQC). The paper covers the history, design, and performance of Moxon antennas, including practical tips for construction and installation.

You can find the PDF paper on various online repositories or websites, such as:

• ARRL (American Radio Relay League): search for "Moxon Antenna" on their website.
• VK5BRB's website: Brian's website has a copy of the paper, along with other resources and articles on antennas and RF topics.

Other Resources

Additional resources on HF antennas, including Moxon designs, can be found on websites like:

• Antenna-Theory.com: A comprehensive resource on antenna theory, design, and simulation.
• Ham Radio Antenna Articles: A collection of articles on various antenna designs, including Moxon and other HF antennas.

Popularized by Les Moxon (G6XN) in his book HF Antennas for All Locations, the Moxon antenna is a compact, two-element rectangle designed for high performance in restricted spaces, providing roughly 70% of the footprint of a standard dipole. Known for high front-to-back ratios and a 50-ohm match, this design is ideal for portable, SOTA/POTA, or limited-space HF operations. View the original text at Internet Archive.

HF Antennas for All Locations : L. A. Moxon - Internet Archive

The reference to HF Antennas for All Locations refers to the classic text by L.A. Moxon (G6XN)

, which is highly regarded for its focus on practical antenna solutions for constrained environments, such as typical backyards. While Les Moxon is the namesake of the popular Moxon Rectangle

, the book itself is a broad exploration of HF antenna theory and design rather than a dedicated manual for that specific antenna. Report Overview: HF Antennas for All Locations Author & Legacy

: Written by Les Moxon, G6XN, a former radar and communications engineer. The book is considered a "must-have" for experimenters, focusing on achieving high performance without requiring massive space or complex mathematics. Key Content Practical Focus

: Designed for radio amateurs and SWL hobbyists who need effective antennas in "all locations," particularly restricted urban or suburban sites. Theory over Recipes : Reviewers from

note that it is not a "cookbook" of measurements but a guide to understanding

antennas work, requiring the reader to calculate dimensions for their specific frequency. The Moxon Design

: Though the "Moxon Rectangle" is synonymous with his name, only a small portion of the book resembles this specific design; however, his principles of rectangular shaping and critical end-spacing are foundational to its high front-to-back ratio and gain. Digital Availability

The full 1982 edition is available for digital borrowing or viewing on the Internet Archive

A searchable PDF summary focusing on new approaches and insights can be found on The Moxon Rectangle Antenna

For users specifically looking for the "Moxon" antenna mentioned in the title, here are its defining characteristics as described in technical reviews: HF Antennas for All Locations Reviews & Ratings - Amazon.in

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Conclusion: Your Next Step – Download or Build

The Moxon rectangle is not a compromise antenna. It is a precision tool that solves the universal problem of HF antennas for all locations. Whether you are fighting an HOA in California, activating a summit in Colorado, or working DX from a balcony in London, a wire or aluminum Moxon will outperform anything else its size.

Your mission today is simple:

1. Search for the "ARRL Moxon Antenna Projects" or "AC5EK Moxon Rectangle Utility" to find a reliable calculator.
2. Create or download a HF Antennas for All Locations Moxon PDF that you can store on your phone and print for your workshop.
3. Build a 20m version using $20 of wire and PVC. Put it up at 20 feet. Point it toward a distant continent.

You will be shocked by the quiet, focused signal. You will hear stations that were previously buried in noise. And you will finally understand why Les Moxon’s rectangle is the most underrated antenna in amateur radio.

73, and may your F/B ratio always exceed 20 dB.

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Did this article help you? Share your Moxon build photos in the comments below. For a complete, ad-free, printable PDF of this guide with full dimension tables for 10-40m, sign up for the amateur radio newsletter (link in bio).

The classic book HF Antennas for All Locations by Les Moxon (G6XN) is a seminal work for amateur radio enthusiasts, particularly those facing space constraints or difficult environments. Moxon is widely recognized for his expertise in designing effective antennas that prioritize performance even in restricted locations. 0x9900.com Moxon Rectangle Antenna

While Les Moxon wrote extensively about various designs, he is most famously associated with the Moxon Rectangle , a compact, directional two-element beam antenna. Albury Wodonga Amateur Radio Club Design Characteristics

: It consists of two folded elements—a driven element and a reflector—with a distinct air gap between their ends. Performance : It offers a high front-to-back (F/B) ratio

and gain comparable to a 2-element Yagi, but in a significantly smaller footprint. : It typically features a feed-point impedance close to , making it easy to match with standard coaxial cable.

: The design is relatively broadband, often achieving an SWR of 1.5:1 or better over a 1000 kHz range on certain bands. Accessing the Book and Technical Guides

If you are looking for digital versions or practical construction data, several resources are available: A 20 Meter Moxon Antenna - 0x9900

Moxon Rectangle is widely regarded as one of the most efficient "small" antennas for HF (High Frequency) communication, especially for radio amateurs with limited space. This design was famously popularized by Les Moxon, G6XN, in his definitive book, HF Antennas for All Locations

, which provides a comprehensive guide for building high-performance antennas in less-than-ideal environments. Internet Archive Why the Moxon Rectangle?

The Moxon is essentially a two-element Yagi antenna with its ends folded inward. This simple modification offers several key advantages:

HF Antennas for All Locations : L. A. Moxon - Internet Archive 21 Mar 2023 —

HF Antennas for All Locations : L. A. Moxon : Free Download, Borrow, and Streaming : Internet Archive. Internet Archive DIY 6 Meter Moxon Antenna: Boost Your Summer VHF Fun! 6 Jun 2024 —

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Title: The Backyard Billion-Mile Beam

Leo was frustrated. He lived in a classic "deed-restricted disaster": a rental townhouse with no attic, a tiny patio, and a homeowners' association that banned anything taller than a tomato stake.

For six months, he fought with a ham stick. He tried an end-fed half-wave thrown into a maple tree. Nothing worked. On 20 meters, he was a whisper in a hurricane. "Sorry, Leo, you're down in the noise," became the hated refrain.

One rainy Tuesday, he stumbled upon an old QST article scanned into a PDF. The title read: "The Moxon Rectangle for the Space-Limited Operator."

He almost scrolled past. The word "rectangle" sounded boring. But the subtitle hooked him: "Two elements. 3 dB gain. 20 dB front-to-back. Fits on a painter's pole."

He opened the PDF. It wasn't like the thick antenna books he owned. This was a survival guide for the desperate.

The PDF explained the magic: The Moxon wasn't a Yagi. It was a folded, bent dipole that tricked the radio waves into thinking the antenna was twice as big as it really was. No massive booms. No giant rotators. Just two wires bent into a C-shape, spaced less than a foot apart for 10 meters.

Leo found the "Moxon Generators" online—free software that spat out exact cutting lengths. You typed in the frequency (say, 14.150 MHz), and it gave you inches: A, B, C, D.

The Build (The "Porch Session")

That Saturday, he bought 50 feet of 14-gauge house wire, a cheap 4:1 balun, and two fiberglass driveway markers for $8.

He followed the PDF’s sacred rule: "Square corners matter. Use a cardboard template." hf antennas for all locations moxon pdf

By 3 PM, he had a floppy diamond shape hanging from a telescoping fishing pole tied to his deck railing. It looked ridiculous. It looked like a broken clothes hanger. But according to the PDF’s SWR charts, it was a laser.

The Test

That evening, a rare 10-meter opening to Japan appeared. Leo’s usual antenna would have heard static.

He pointed his "fishing pole Moxon" east by using a cheap compass app. He called "CQ DX."

A voice punched back. "Whiskey-Seven-Leo, you are 5-9 plus! Where is the beam?"

Leo laughed. "It’s a bent wire on a stick, Tokyo."

"Impossible," the voice replied. "You have no noise. You sound like a broadcast station."

For the next hour, Leo worked Japan, New Zealand, and Brazil. The PDF had promised a 20 dB front-to-back ratio—meaning he couldn't hear the neighbor's plasma TV or the HOA chairman's leaf blower behind him. It delivered.

Why the PDF Matters

That night, Leo printed the PDF, laminated the two pages, and hung them in his shack. The title read: "HF Antennas for All Locations: The Moxon."

In tiny text at the bottom, the author had written a note: "If you have a wall, a window, or a will—you have a place for a Moxon."

Leo finally understood. You don't need 100 feet of tower and an acre of land. You need the right geometry. The Moxon rectangle is the guerrilla fighter of HF antennas: small, stealthy, and shockingly fierce.

The End.

If you want the actual PDF: Search for “Moxon Rectangle Project” by L. B. Cebik (W4RNL) or use the free “MoxonGen” software. Most ham radio sites host the original 2-page build guide.

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Practical Multi-Band Solutions for Your PDF Notes:

1. The Two-Head Moxon: Build two complete Moxons on a single boom – one for 20m and one for 15m. Space them 3 feet apart. Use a single feedline and a remote coax switch at the boom.
2. The Linked Moxon: Add external links (jumpers with banana plugs) to the element ends of a 40m Moxon. Shortening the elements converts it to 30m or 20m quickly. This is ideal for portable operators.
3. The Hex Beam Comparison: A Hexbeam is essentially a multi-band derivative of the Moxon family. If you want 5 bands (10-20m) in a lightweight rotatable package, study the “Hex Beam” – but note that a true Moxon for a single band will always have higher F/B and gain.

Feature Title

"The Universal Moxon Designer: HF Antennas for Any Location" (Interactive PDF + Calculator Bundle)

HF Antennas for All Locations — Essay

High-frequency (HF) radio remains one of the most versatile and resilient modes of long-distance wireless communication. HF spans roughly 3–30 MHz and supports skywave propagation via the ionosphere, enabling single-operator stations to reach across continents with modest equipment. However, effective HF operation depends heavily on antenna choice and installation. “HF antennas for all locations” implies a practical, inclusive approach: selecting, adapting, and optimizing antennas so operators in varied environments—urban apartments, suburban lots, small rural properties, portable field sites, and restricted-roof installations—can achieve reliable performance. This essay surveys key HF antenna types, analyzes trade-offs for constrained locations, addresses tuning and matching (including the role of the Moxon rectangle), and offers pragmatic guidance for achieving usable HF performance anywhere.

Antenna fundamentals and practical constraints Antennas convert radio-frequency currents into radiated electromagnetic waves and vice versa. Their effectiveness is determined by length relative to wavelength, radiation pattern, impedance, bandwidth, height above ground, nearby structures, and feedline losses. In HF, wavelengths range from 100 m (3 MHz) to 10 m (30 MHz), making full-size resonant antennas physically large. Most real-world operators cannot deploy full-size half-wave dipoles at ideal heights. Constraints fall into several categories:

• Space-limited urban apartments (no outdoor space or strict HOA/landlord limits).
• Small yards or lots where span or height is limited.
• Rooftops with limited span and nearby metal.
• Portable and emergency deployments requiring quick setup and lightweight gear.
• Noisy RF environments that reduce signal-to-noise ratio.

Common HF antenna types and suitability by location

1. Dipoles (half-wave center-fed)

• Description: Simple, efficient, resonant; feedpoint at center with balanced currents.
• Pros: Good efficiency when installed near half-wavelength, predictable pattern.
• Cons: Requires length ≈ 0.5λ; performance degrades when low to ground.
• Best for: Small to medium yards where horizontal span is feasible. In limited height, use inverted-V configuration to reduce span.

2. Inverted-V

• Description: Dipole with center high and ends sloped down to supports.
• Pros: Reduced span and support requirements, single high point.
• Cons: Lower takeoff angle and some impedance change vs. flat dipole.
• Best for: Rooftops and small yards where two high supports are unavailable.

3. End-fed half-wave (EFHW)

• Description: Half-wave fed at one end, often with a matching transformer.
• Pros: Single support point, multiband capability with high-Z matching.
• Cons: Feedline radiation if not properly matched; feed transformer required.
• Best for: Rooftops, portable ops, stealth installations when a single pole or window line is available.

4. Vertical antennas (quarter-wave, loaded verticals)

• Description: Vertical polarization with ground or counterpoise system.
• Pros: Low footprint, omnidirectional pattern, low-angle radiation good for DX.
• Cons: Ground radial system required for efficiency; noisy in urban areas.
• Best for: Small lots and mobile/portable use where height is limited; use elevated radials or counterpoise when ground radials aren’t practical.

5. Loop antennas (full-wave loops, magnetic loops)

• Full-wave horizontal loop:
  • Pros: Good efficiency, broad bandwidth, lower noise pickup sometimes.
  • Cons: Requires large perimeter (≈1λ), height and space needed.
  • Best for: Larger properties and suburban sites.
• Small transmitting loop (STL or magnetic loop):
  • Pros: Very compact (circumference << λ), effective Rx in noise, useful where space is tiny.
  • Cons: Narrow bandwidth, requires careful tuning and robust capacitor at high power.
  • Best for: Apartments, stealth rooftop installations, portable urban ops.

6. Yagis and directional arrays (including Moxon rectangle)

• Description: Directional arrays using driven element and parasitic elements; Moxon is a compact two-element rectangular parasitic array derived from two-element Yagi designs.
• Pros: Gain and directivity improve signal-to-noise and suppression of unwanted directions; Moxon is compact and forgiving on boom length and spacing.
• Cons: More complex to build, requires rotator or manual reorientation; needs space for boom and elements.
• Best for: Situations where some horizontal space and elevated mounting exist (rooftops with permission, small towers, portable masts). Moxon is particularly suited to limited-space installations seeking directional gain with shortened overall dimensions.

The Moxon rectangle: why it matters for many locations The Moxon rectangle is a two-element parasitic directional antenna that trades some peak gain of larger Yagis for compactness, lower weight, and simpler construction. Its rectangular shape and folded tips increase bandwidth and allow slightly shorter element lengths than a straight two-element Yagi. Key advantages for “all locations” scenarios:

• Compact footprint: smaller boom length and element span than equivalent-gain yagis, useful on rooftops and portable masts.
• Wider bandwidth and forgiving tuning: easier to build and tune practically.
• Good front-to-back and modest gain (~3–6 dBi depending on frequency and height), improving reception/transmit in targeted directions and reducing local noise pickup.
• Can be built as a lightweight temporary or permanent installation, or made portable for field use.

Tuning, matching, and multiband strategies Real-world HF installation requires attention to impedance matching, feedline losses, and bandwidth:

• Use an antenna analyzer to measure resonant frequency, SWR, and feedpoint impedance while adjusting length and spacing.
• For dipoles and inverted-Vs, aim for resonance near band center to minimize tuner losses. If height is low, expect reduced feedpoint impedance—use a tuner or matching network.
• EFHWs require a well-built 9:1 or 49:1 matching transformer at the feedpoint to transform high impedance to coax; ensure good insulation and lightning protection.
• Vertical antennas need an adequate radial system. Where ground radials are impractical, use elevated radials or a tuned counterpoise.
• Magnetic loops require a high-voltage capacitor and solid mechanical construction; use them for receive-heavy or low-power transmit (QRP) use.
• For multiband operation: use traps (heavier, lossier), fan dipoles (multiple dipoles from a common feedpoint), end-fed multiband designs, or an antenna tuner to broaden usable bands. Where bandwidth is narrow (loops, single-band designs), use an efficient tuner at the feedpoint or at the radio.

Practical installation guidance by location

• Apartments/No Outdoor Space:
  • Use a window-mounted or balcony-deployed shortened magnetic loop for receive and low-power transmit.
  • Consider a stealth EFHW run along gutters or inside attics; use a well-sealed matching box and common-mode choke at the coax.
  • Use portable operation from nearby parks or beaches (POTA style) if higher power/range needed.
• Rooftops and Townhouses:
  • Install inverted-V or compact Moxon on a short mast; use guying and non-penetrating mounts if needed.
  • Run coax with a common-mode choke and surge protection; be mindful of building metal and safety codes.
• Small Yards:
  • Horizontal dipole, inverted-V, or vertical with elevated radials are good choices. For directionality, a Moxon on a short rotatable mast gives DX advantage without large towers.
• Rural/Large Properties:
  • Full-size dipoles at 1/2λ heights, horizontal loops, or multi-element Yagis on towers are possible; maximize height for low-angle radiation.
• Portable/Emergency:
  • Lightweight Moxon or end-fed wires on telescoping masts, or lightweight verticals with limited radials; prioritize fast deployment and tuners.

Noise mitigation and coax/feeder considerations

• Use balanced feed (ladder line) with an antenna tuner when possible to reduce feedline losses and improve multiband performance—especially important when antennas are not resonant.
• Chokes (ferrite or coaxial baluns) at the feedpoint reduce common-mode currents and RFI.
• Choose low-loss coax (e.g., LMR-400 or equivalent) for long runs, and keep runs as short as practical.
• To reduce local noise: use directional antennas to null noise sources, raise antennas above local clutter when possible, and use ferrite beads and proper grounding at equipment.

Safety, grounding, and regulatory concerns

• Follow local electrical and building codes, maintain safe clearances from power lines, and use proper lightning protection (grounding, surge arrestors).
• Obtain landlord or HOA permission where required. For temporary portable operations, understand local restrictions and privacy considerations.

Building a compact Moxon: brief construction notes

• A Moxon for a given HF band uses two rectangular elements with a calculated spacing and foldback (the exact dimensions depend on frequency). Typically built from insulated wire or aluminum tubing on a small boom.
• Feed the driven element center with a short matching section—commonly a 1:1 current balun—to feed coax.
• Tune lengths for resonance and adjust separation for best front-to-back and SWR.
• For multiband use, consider stacked or trapped Moxons, or deploy separate lightweight elements for each desired band.

Conclusion HF communication is achievable from nearly any location if operators choose antennas suited to their constraints and take care with matching and installation. The Moxon rectangle exemplifies the pragmatic compromise many operators need: compact, directional, and forgiving—well suited for rooftops, small lots, and portable setups. Complemented by inverted-Vs, end-fed wires, verticals with elevated radials, and magnetic loops where space is most constrained, an operator can assemble a toolkit of antennas that cover most HF needs. With thoughtful placement, proper matching, and attention to grounding and noise reduction, reliable HF performance is within reach for the majority of hobbyists and emergency communicators, regardless of site limitations. Moxon Antenna Overview The Moxon antenna, also known

Further practical resources

• Antenna calculators and modeling tools (EZNEC, MMANA, 4NEC2) for designing and predicting performance.
• Antenna analyzers and SWR meters for real-world tuning.
• Construction guides or published plans for Moxon rectangles and other compact HF antennas.

Related search suggestions (Additional relevant search terms you might try: "Moxon antenna dimensions calculator", "magnetic loop HF antenna design", "end-fed half-wave matching transformer", "compact HF antennas rooftop", "portable Moxon build plans")

The Moxon Rectangle, popularized by Les Moxon (G6XN) in his seminal book HF Antennas for All Locations, is a compact, two-element directional antenna favored for its high performance-to-size ratio. Core Design Features

Rectangular Geometry: Unlike a standard straight-element Yagi, the Moxon folds the ends of the driven element and reflector toward each other.

Space-Efficient: The folded ends reduce the antenna's width to approximately 70% of a standard two-element Yagi, making it ideal for restricted spaces.

Direct Feed: It typically presents a near-perfect 50-ohm impedance, allowing it to be fed directly with coaxial cable without complex matching networks like baluns or gamma matches.

Critical Gap: The spacing between the ends of the driven element and the reflector (the "gap") is the most critical dimension for achieving its unique performance characteristics. Performance Benefits

Exceptional Front-to-Back (F/B) Ratio: The Moxon is renowned for its high F/B ratio (often exceeding 30-40 dB), which effectively rejects unwanted signals from the rear.

Broad Forward Beam: It offers a wide main lobe (often over 100 degrees), making it more forgiving to aim than a narrow-beam Yagi.

Low Angle of Radiation: When mounted correctly, it provides the low radiation angle necessary for long-distance (DX) communication.

Wide SWR Bandwidth: Especially when constructed with tubing, it maintains a low Standing Wave Ratio (SWR) across a broad frequency range. Common Construction Materials (PDF) Design and Development of UHF Moxon Antenna

HF Antennas for All Locations by L.A. Moxon (1982) is a definitive guide on constructing high-performance, space-efficient antennas for amateur radio, particularly popularizing the 2-element "Moxon Rectangle" design. The book provides practical techniques for optimizing HF performance in limited spaces by focusing on antennas with high front-to-back ratios and direct 50-ohm feeds. View the original text at Internet Archive

HF Antennas for All Locations : L. A. Moxon - Internet Archive

"HF Antennas for All Locations," authored by Les Moxon (G6XN), is a cornerstone of amateur radio literature. First published in 1982 by the Radio Society of Great Britain (RSGB), it remains a primary reference for operators seeking efficient antenna solutions in restricted environments. Overview of the Moxon Antenna

The Moxon antenna, or "Moxon Rectangle," is a compact, two-element directional beam. Its design effectively shrinks a standard 2-element Yagi to approximately 75% of its original size by folding the element ends inward. Building a 10 Meter MOXON Antenna - Easily!

To find the specific "HF Antennas for All Locations" guide featuring the Moxon design, you are likely looking for the work of L.B. Cebik (W4RNL) Moxon Antenna Project

. The Moxon Rectangle is a popular HF antenna because it provides directional gain and a high front-to-back ratio in a footprint 30% smaller than a standard 2-element Yagi. Key Resources and PDF Guides The Moxon Project : The primary hub for Moxon designs, including the Moxon Rectangle Construction Guide , can be found at MoxonAntennaProject.com

. This site hosts numerous PDF calculators and design models for all HF bands. L.B. Cebik’s Collection : The late L.B. Cebik

wrote extensively on "Moxon Rectangles for All Occasions." His technical papers are the gold standard for understanding the geometry and feedpoint impedance (typically , requiring no matching network). Antenna Programs : For custom builds, the Moxon Calculator

allows you to input your target HF frequency to generate exact wire lengths and spacing. Barrett Communications Why Choose a Moxon for "All Locations"? Compact Footprint

: Its folded-end design makes it ideal for small yards or portable "all location" setups like POTA (Parks on the Air). Directivity

: It offers a very clean pattern with almost no side or back lobes, which helps reduce local noise. Broadband Performance

: Unlike some specialized beams, it maintains a low SWR (typically 1.5:1 or better ) over a wide range, such as 1000 kHz on some bands. Durability

: Because the elements are physically shorter and supported at both ends (forming a rectangle), it is more robust against wind than a traditional Yagi. Quick Design Specs for HF Typical Value ~5.5–6.0 dBi Comparable to a full-sized 2-element Yagi. Front-to-Back Ratio 20–30 dB Exceptional rejection of signals from the rear. Direct coax feed with no tuner needed in many cases. ~70% of a Yagi Fits in restricted spaces or HOA-friendly setups.

For a successful "all location" install, ensure the antenna is mounted at least 1/2 wavelength high Compact design : Moxon antennas are relatively small,

for the target band to optimize the takeoff angle for long-distance (DX) communication. specific wire cutting list for a particular HF band, such as 20m or 10m? EAntenna 8MOX Moxon antenna 8m band - WiMo

Part 7: Where to Find the Ultimate "HF Antennas for All Locations Moxon PDF"

You want a single, downloadable, printer-friendly document. Here is what to look for (or how to assemble your own ultimate PDF):