dc filter

MD-DC QSO Party - Rules and regs and forms and previous winners of this event.

Australian Callbook - Register of Radiocommunication Licences

DXCluster IOTA spots - Live IOTA spots by the dxsummit dx cluster

ZF1DC David Corbin - Countries worked on 6 meters, ZF firsts on 50 Mhz, and links to resources.

Valcom Fibreglass Whip Antennas - Manufacturer of Fibreglass Whip Antennas, Low and mediun Frequency, HF and VHF Antennas Specialized in the design and manufacturing of a full range of Beacon (MF), AM Broadcasting 540 - 1700 KHz, HF 1.7 to 30 MHz, VHF 30 to 156 MHz and UHF 200 to 500 MHz antennas.

Hi-Q Antennas - HF Ham Radio mobile operation antennas manufacturer, W6HIQ, HA5CMG, VE7BOC, HF mobile antennas, screwdriver antenna, coils and filters.

EH Antenna Systems - Provide information relative to a new antenna concept. AM Broadcast antennas and amateur radio prototypes

Palstar - Receivers, Antenna Tuners and accessories, antenna analyzers, dummy loads, wattmeters, shortwave radio receivers, baluns, filters

VLF Time Signal Broadcasts - Station List Compiled by William Hepburn, LWCA

K4SET, Soundcard Digital, MFSK - "MFSK and the SoundCard Digital Software Revolution"" by K4SET and WD4HVA"

Connect two PC together with Laplink cable - How to easy connect two Pc together with a laplink cable

AA Woodcrafts - Amateur radio call sign displays precision cut in wood. Being 18mm thick they are designed to stand on a desk or shelf.

Save the BBC WS in NA - As of July 1, 2001, North America and the Pacific are no longer targeted with shortwave broadcasts by the BBC World Service.

Writing reception reports - A guide on writing reports to broadcasting stations and obtaining QSL cards

Contact info for Stations Worldwide - Address and links of many broadcasting stations

Hungarian Listener Homepage - FM & SWL, broadcasting, media, FMDX,frequency lists, ham adio

WINRLC - Simple freeware tool to calculate several kinds of HF filters. Use to calculate L-C and R-C band filters and bandpasses, L-C, L-R and R-C highpasses and lowpasses, coils and capacitors.

EchoFilter - EchoFilter uses the soundcard of a PC to process income audio signals in real-time. The narrow filter bandwidth allow the extraction signals and sounds from the audio signal that may normally be close to inaudible. It is intended for radio HAMS, hobbyists, researchers, scientists and students in the DSP field.

SpotCollector  ^updated - A free application that captures DX and WWV spots from up to 5 internet clusters and a local packet cluster. DX Spots are merged and stored in a Spot Database on your PC, enabling you to monitor, sort, and filter them in real time; known LotW participants are highlighted, as are needed stations. WWV spots are plotted to show SFI, A, and K over the last solar revolution.

Cluster monitor - Cluster monitor is a tool for web and telnet clusters monitoring. The program shows spot history, the latest spots are shown in a separate window with full information about the DX, announcements, WWV propagation, and full sorting and filtering capability. Full support for AALog and AAVoice by RZ4AG, DXAtlas by VE3NEA. Integrated dial-up support.

Feldnew8 - DOS Hellschreiber radio program by G3PPT

DXCluster for iPhone  ^updated - DXCluster let you know in real time who is on the frequencies and where it was listened the last time. It let you create filters to only see which frequency/CQ Zone/ITU Zone and/or Country and after that you can have an alarm corresponding to a specific Zone or a specific country that raise a popup

Ham Radio Circuits  ^pop - Circuits of SSB Transceiver, AM DSB Transmitter, Antennas, BFO, VFO, 807, FM Mike, Crystal filter and more.

12VDC Power Supply - It is easy to build a 12 VDC power supply out of an old computer power supply.

A secure power supply - Dchematics and photos of a secure power supply (short-cut, Rf feedback, high voltage etc.) by iz7ath