rf trap

DL9MEU Antenna projects - Basics for a good Antenna:``Only if you can hear it, you can work it!``Symmetric antennas save a lot of trouble.``No traps - no radials - no loading coils.

Build A Magnetic Loop  ^{updated  pop} - Documents and schema on how to build a Magnetic Loop Antenna fo 80/30 mtrs

HF mobile antenna  ^pop - Build your mobile antenna which outperforms Hustler by 10db and ATAS-100 by 18db. From 80 to 10m.

Radio Friends DX Group - The official webpage of Radio Friends DX Group

Christian Amateur Radio Fellowship - CARF combines the wonderful world of amateur radio with Christian fellowship and service

Nellis Radio Amateur Club - "Located at Nellis Airforce Base-Las Vegas, Nevada USA. Nellis RAC is a progressive radio club. Providing licensing classes, on-air code study group, vhf/uhf repeaters, emergency and public service communications, ""Aviation Nation"" Airshow Special Event Station N7V"

Leitner Elettronica - RF Amplifiers for HF VHF UHF

Nemal Electronics - Manufacturer of standard and custom electronic cable, connectors, cable assemblies, and patch panels for broadcast, audio, video, RF, microwave, and electronic control applications.

Amateur Radio Products - BullDog Iambic keyers, memory keyers, beacon boards, interface cables

WaveNode Precision Station Monitoring - The WaveNode WN-1 is a precision, full-featured Amateur Radio Station Monitoring System which now includes Audio Announcing for RF power, SWR, and DC monitoring using HF and UHF remote sensors.

Marine broadcast - World Wide Marine Radio Facsimile Broadcast Schedules From NOAA, wefax scheduling

50 Mhz Dx & Audio Files - Lage collection of 6 Meters and 2 meters QSOs, recorded in real audio format by OE3MWS

DOMINO - new MFSK mode - A new MFSK mode with IFK by ZL1BPU and ZL2AFP.It is a simple Amateur Radio mode for keyboard QSOs. domino provides digital chat-mode operation on the HF bands, using the well respected sound card technique. Domino will handle TX/RX offsets and mistuning of 200Hz with ease, and will provide perfect copy of drifting signals up to 200Hz/minute!

How to wind a choke - How to build and properly wound an efficient RF choke to protect antenna controller in mobile setups

Yaesu FT857 897 Interface - FT857 and FT897 Interface PCB and schematic

K1CRA Radio Store - Unique and Hard-to-Find accessories for Amateur Radio. Featuring Plasti Dip products, DK9SQ Masts, Wire Antennas, AEA Antenna Analyzers and RF Connectors too!

RFI - Radio France Internationale - Le site de Radio France Internationale (RFI). L'actualité internationale en français et en 19 langues. Ecoutez RFI sur Internet et découvrez les dossiers d'actualité, les programmes et les fréquences de RFI à travers le monde, toutes les émissions, le club RFI, la langue française, les forums de discussion, les revues de presse, les éditoriaux, la météo marine, MFI.

Digital Modes collection - RTTY SSTV PSK31 MFSK MT63 PACKET APRS and more...

SuperNEC antenna simulation - Hybrid Method of Moment (MoM) and Geometric Theory of Diffraction (GTD) program. Matlab based GUI interface. Genetic optimizer included. Windows/Linux versions.

iSpectrum Analyzer - Macintosh audio spectrum analyzer that allows the user to view live audio in a standard frequency plot, a stereo oscilloscope view and a waterfall display

HamCAP - A freeware HF propagation prediction tool, that interface the VOACAP tool by Alex VE3NEA

FODtrack Satellite Tracking Interface - Construction tips to build an automatic``satellite tracking rotor controller using``PIC16F877 IC.

A.M. tutorial - This tutorial is designed to help explain some of the concepts involved in RF power measurement for amplitute modulated signals.

Transistor Specifications - Transistor Specifications, ``RF Power Mosfets ¹ HF VHF transistors

Amateur Radio Repeater Controller - The project requirement is to design the interface to the signal channel elements after the receiver and before the transmitter