Miscellaneous Communications

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All about FM radio - Schematics, KITs, FM transmitters, digital ... Schematics, KITs, FM transmitters, guides, stereo encoders, PC based FM transmitters, DIY projects, forums, one of the best sources for FM broadcasting online. Turn your PC into a radio station! "Pirate Radio stuff... See also: The Pirate Radio Survival Guide - First Edition 1996 and for alot more: Do-It-Yourself Radio

Radio Electronics Radio and Electronics (DED Philippinen, 66 p.)

Introduction to Radio Communications by Thomas Icom. Short article also includes "A Primer on Amateur (Ham) Radio" by Byron Kirkwood, "COMMO FOR SURVIVAL: RADIO 101" [author unknown], and "How WWII POWs and soldiers trapped in foxholes rigged up a broadcast radio receiver."

Amateur Radio Online Tutorial

FM Voice Repeaters - TEARA's Repeater Operating Guide The communication range between Amateur VHF-FM mobile and handheld radios at ground level is limited -- five to fifteen miles for mobiles, and just a couple of miles for handhelds. This is usually referred to as "line-of-sight" -- you can talk about as far as you can see (if you cut down the trees). To extend our range, we use repeaters. A repeater is a specially designed receiver/transmitter combination. When you operate through a repeater, its receiver picks up your signal on it’s input frequency, and the transmitter re-transmits -- or "repeats" -- you on the output frequency. For example, one of the TEARA repeaters hears you as you transmit on 147.990 MHz, and repeats you onto 147.390 MHz. You'll hear this repeater referred to as "three-nine."

The "Cigar Box" Crystal Radio Set - The Xtal Set Society On this page you will find complete plans for the Cigar Box Crystal Radio Set. This project was first published in Volume 7 of the Xtal Set Society Newsletter, but the project has been so popular that we decided to put it online. [Link recovered 5/12/11] See also: The Quaker Oats Box Crystal Radio Set

The Emergency Alert System (Formerly known as the Emergency Broadcast System) EAS is the latest chapter in a public alerting system that traces it's lineage back to the CONELRAD (Control of Electromagnetic Radiation), program that was started by the Truman administration. Since the Federal Communication Commission's (FCC) adoption of the EAS rules in November of 1994, equipment manufacturers, broadcasters, and cable operators have been preparing to provide EAS service to their customers. Many people, both inside and outside the world of the Emergency Broadcast System (EBS), have heard of the new system but are unsure as to exactly what the new EAS is, who will use it, and what makes it better then the old system. [Link recovered 5/12/11]

A Radio Primer Rick Donaldson, CET, N0NJY. This article is not simply radio theory. It is actually a story about childhood discoveries. However, the article will give some basic radio theory skills and teach you something about how to build a simple, but useful radio from almost nothing. [Link recovered 5/12/11]

AMATEUR RADIO AND DX REFERENCE GUIDE AN INDEX OF OVER 400+ HAM, DX & SWL TOPICS FEATURING 88 PAGES AND OVER 3000 LINKS TO DX AND HAM RADIO

Survival Communications FAQ v0.5 Dated, but still informative

Radio-Communications Theory IN this unit we briefly look at the historical development of radio communications and introduce the principles of electromagnetic (EM) radiation. We’ll also discuss the characteristics and properties of radio waves, and take a detailed look at the electromagnetic spectrum. From the first radio transmissions between St. John’s, Newfoundland, and Cornwall, England, radio communications have undergone continued improvements, evolving into the sophisticated systems now used to communicate with space vehicles millions of miles from earth and nuclear submarines cruising the ocean’s depths. Research continues today as powerful radio transmissions are probing deep into the universe in an attempt to establish contact with alien life. You will discover radio communications are a unique and reliable form of communications and will continue to play a vital role in military, commercial, and scientific advances.

Radio-Frequency Communication IN this unit we’ll examine discuss specific aspects of radio communications across the radio-frequency band of the electromagnetic spectrum. Since HF is the primary mode of our communications we’ll look at it first. Specifically, we’ll cover examine HF wave propagation, the ionosphere, and its effects on propagation. We’ll also examine HF engineering ideas, limitations on the use of HF, and satellites and their effect on HF communications. Next, we’ll look at the lower frequency bands and the upper frequency bands. Again, we’ll examine wave propagation and limitations on the use of these frequency bands.

NRaD LOW-COST MINIATURE INTERFACE AND CONTROL SYSTEMS (AMGSSS) Low-cost Commercial-Off-the-Shelf (COTS) hardware and software products can be used to build small control, processor and interface devices suitable for current and future tactical radio systems. For example, the input from video cameras, infrared imagers, acoustic transducers, proximity detectors, laser range finders, and other sensor input can be digitized, compressed, processed and transmitted via SINCGARS radios when a soldier presses a button. Tactical radios could also be connected to ethernet or telephone lines, and a radio could become a field-accessible email address, file server, or message bulletin board. These capabilities can be developed and fielded quickly for a very modest cost.

Global Positioning System Overview These materials were developed by Peter H. Dana, Department of Geography, University of Texas at Austin, 1994. These materials may be used for study, research, and education in not-for-profit applications.

The GPS Resource Library This is a page of links containing information about the Global Positioning System (GPS) and handheld GPS units.

Antenna website While this site requires a subscription for most of the content, they also have a great deal of their articles available for free reading.

Tactical Radio Jammers Contained within this page, you will find information regarding military tactical radio jamming equipment. This is accompanied with full digital audio recordings of the various modes employed by these systems.

Disaster Communications {Pt. 1 Global}The ease of communication in a developed city is seductive, so much do we take it for granted that it becomes like the wallpaper in the office (no cheating, do you remember the pattern?). It is a serious but common mistake to underestimate the complexity and importance of communications, that is why The Disaster Relief Communications Foundation (DRCF) continuously researches and reviews the whole matter, calling on expert opinion to keep their advice up to date. Part 2 Satellite Systems | Part 3 HF Radio (Terrestrial Systems) | Part 4 Power | Part 5 Legal Issues | Part 6 Local | Part 7 Summary [Links recovered 5/12/11]

Spread Spectrum Scene Magazine The best website dedicated exclusively to the art and science of Spread Spectrum digital communications. SSS Online is targeted for the Spread Spectrum professional and is committed to being the primary source for the latest news and information about the growth, regulation and opportunities in this developing technology. As an online, web-based source of technical information, SSS Online also covers the fields of RF and Wireless with a depth that is hard to find on the Internet. Even between new issues of the E-zine, SSS Online provides worthwhile browsing and reference material use, since there are so many informative pages of useful information to peruse.

"The Oatmeal Box Crystal Radio Set" Great little article on building your own crystal radio out of an oatmeal box (tube). Includes parts list, graphics and detailed instructions. Great science project.

"FM 34-36 SOF Intelligence & Electronic Warfare Operations" This manual focuses on the missions and functions of intelligence elements and organizations which provide intelligence and electronic warfare (IEW) support to ARSOF organizations. It provides doctrine for special operations forces (SOF) IEW operations, including military intelligence (MI) organizations, missions, functions, and capabilities from support operations team-A (SOT-A) and S2 section levels to SOF and the senior intelligence officer (SIO) at the joint level. It shows how these IEW assets meet ARSOF operational needs within the established IEW system. It also lays out some "how to" techniques and procedures required to conduct IEW operations within the framework of the intelligence cycle. This manual expands upon the doctrine in FM 34-1 and FM 100-25. This doctrine is written specifically for SOF S2s, military intelligence (MI) commanders, and other assigned MI personnel, and the elements which support them. It also includes SOF commanders and their staffs. The doctrine reflects current Army SOF IEW capabilities.

"FM 34-1 Intelligence & Electronic Warfare"

"FM 34-40-7: Communications Jamming Handbook" LOCKED: AUTHORIZATION REQUIRED This manual explains how to employ the effective jamming techniques referenced in FM 34-1. Instructions are presented to the mission planner for calculating the minimum jammer power output requirements and the maximum distance a jammer can be placed from a target receiver based upon the jammer’s power output. This information can be found by using the electronic warfare jamming calculator (appendix). Doctrine, tactics, techniques, and procedures in this field manual are intended for commanders and their staffs, division tactical operation centers, technical control and analysis elements (TCAEs), mission management personnel, and other personnel who plan or conduct jamming operations. This publication applies equally to active Army and Reserve Components. DELETED - This FM has been SUPERSEDED by FM 34-45, Tactics, Techniques, and Procedures for Electronic Attack, 9 June 2000. Now available

"FM 11-1: Procedures For Single Channel Ground/Airborne Radio System"

"FM 11-43: Signal Leader's Guide" This manual is a hip pocket-sized field reference guide for junior signal leaders (officers and noncommissioned officers (NCOs)). It is intended to help the signal leader to understand and to implement signal support under the Information Mission Area (IMA) concept. This manual covers commonly needed information such as signal site reconnaissance, leading convoys, profiling line-of-sight (LOS) links, and troubleshooting signal equipment. It also contains an overview of signal support doctrine and currently fielded communications systems. It is targeted at junior signal officers and NCOs in tactical environments from battalion through echelons above corps (EAC).

"FM 24-12: Communications in a Come-As-You-Are War" LOCKED: AUTHORIZATION REQUIRED This manual is designed as a handbook of helpful information and methods for providing essential communications support in the face of communications equipment shortages in AC and RC units. It also addresses methods for achieving interoperability between different generations of tactical communications equipment.

"FM 24-19: Radio Operator's Handbook"

"FM 24-33: Electronic Counter Measures" This manual concentrates on the defense against enemy efforts to disrupt or destroy our effective use of the electromagnetic spectrum for communications. Following the techniques in this manual will increase our chances for success on the Air-Land battlefield. The communications electronic counter-countermeasures (ECCM) in this manual will assist commanders, staff personnel, and radio operators. This manual will also assist signal officers and electronic warfare (EW) personnel. The techniques in this manual are proven; however, they are not all inclusive. Maintaining effective, friendly communications on the Air-Land battle field will depend on our ability to enhance proven ECCM techniques.

Downloads from REVeNGER's Web Site: TO DOWNLOAD SOME FILES MAY BE YOU HAVE TO DO RIGHT CLICK ON THE FILE AND SELECT THE "SAVE TARGET AS" OPTION.

1. An Intro To Pirate Radio 4k Date : Unknown

2. Digital Communication Via Radio 5k Date : Unknown

3. Introduction To Radio Communications 12k Date : Unknown

4. Siemens Chip Card Technology 5k Date : Unknown

5. Electronic Expertise 5k Date : -/1/82

6. Low Power Broadcasting Faq 14k Date : 1/4/97

Radio Transmitter Schematics a collection of schematic diagrams for radio transmitters and transmitter amplifiers. Although circuit components are labeled (and can be built easily), schematics are for educational purposes only!!! Operation of some of these devices may require licensure. If you wish to experiment with RF transmitting circuitry without violating regulations, use a dummy load in lieu of an antenna.