ANFR Agence nationale des fréquences. Tech-Docs Index. Click on any of the following links to see the Firestik document regarding the subject matter. Based upon thirty-five years of experience in the personal communications business, we believe that 95% of your questions will be answered by one or more of the documents. The document names that begin with an (*) asterick contain the text and graphics found in our booklet "Measuring SWR and Things Every CB'er Should Know". Please read the document "Firestik Technical Help" before contacting us regarding your problem(s). If you supply the requested details it will save time and make our assesment of your system more accurate. Lastly, if you have visited any of the pages in the past, we suggest that you use your refresh/reload button whenever you come back to a page.
Prior visited pages are held in your computers cache. If we've made a change in the page content, you may not see it if your computer pulled the old page from its cache. Spy Numbers Stations Shortwave Radio. U.S. Clandestine Radio Equipment. U.S. Clandestine Radio Equipment Recent Updates: 2014-Feb-17 (F-21 camera, hearing-aid mics) 2012-Dec-26 (New pictures and info in TAR-224 section.) 2012-Jan-14 (Added Czech Tesla PR-35 in “Foreign” section.) 2012-Jan-01 (Added TR-5 pictures in “Village Radios” section.) Written/compiled by Peter McCollum I can be reached at: Saipan 59 (at) Q (dot) com [remove spaces, substitute '@' and '.' where needed] (c) 1998, 2014 Peter McCollum This site is graciously hosted by Don Reaves W5OR A great book is available!
NOTE: I do NOThave a financial interest in sales of the book, although I certainly feel it is a great reference, and by far the biggest/best book ever published on this topic. To order online go to the following link, Click the "Search" button on the left, and then enter 'clandestine': . Louis' web site has info about the content, and a phone # to contact the publisher: Contents Introduction The "Joan-Eleanor" System Other OSS Equipment 1. VHF Community Radio Electronics - An Introduction. An Introduction This document explores the concepts involved in radio broadcasting relevant to the community radio operator on VHF FM. We will go a step by step tour of a typical VHF FM transmitter system starting with the output from the tape recorder or mixer, and finishing with a brief discussion of aerials.
At each stage we will discuss the pros and cons of various alternatives, provide additional background information and introduce the use of test equipment. [ How to be a Community Radio Home Page | Community Radio Frequently Asked Questions and Answers] Exciter Kit Reviews Pictures Introduction What we are trying to is get information from one place to lots of others.
Radio frequency (RF) signals have amplitude and frequency. Two ways of imparting our wanted information onto the RF carrier are Amplitude Modulation (AM) and Frequency Modulation (FM). Frequencies between 30 MHz and 300MHz are known as Very High Frequencies or VHF. Wavelength (in metres) = 300 frequency (in MHz) VFOs. Learning and Using Morse Code, by Bob Nellans. Learning and Using Morse CodebyBob Nellans, K9DE ex KB9DE ex WD9ABICopyright ©1998, Bob Nellans. All Rights Reserved About the International Morse Code Sending the Code Copying the Code Taking Code Tests Speeds above 20 wpm International Morse Code The International Morse Code is made up of a series of what were incorrectly called dots and dashes, for many, many years. What is being sent, the dits and the dahs, are segments of a continuous tone, commonly called, Continuous Wave (CW), a term often used interchangeably with the International Morse Code.
Sending the code The original code sending device was a simple make/break contact device, much like a telegraph key, which was/is commonly called a straight key. A firm named Vibroplex later came up with a mechanical device that attempted to control the lengths of the dits and dahs by the settings of the mechanism, rather than by the timing of the operator. Copying the code. Accueil - Bienvenue, sur le site officiel du REF-Union.