dc filter

WB4WOR Propagation Beacons - WB4WOR Propagation Beacon on 6 and 10 meters Jointly Owned and Operated by the Broadcast Packet and Repeater Group and Piedmont Amateur Radio GroupRandleman, NC USA

Idiom Press - CW keyers, Logikey, and antenna rotator controll like rotor-ez, and active audio low pass filters.

Wavenode SWR and RF wattmeter - The WN-1 is a precision RF Watt, SWR, and DC Meter to digitally monitor your amateur radio and emergency communications stations.

An HF Packet Tuning Indicator - This article describes the use of a PSK31 soundcard program's "waterfall" display as great tuning indicator for any HF packet TNC

TCP/IP on FlexNet - TCP/IP on FlexNet, just another layer

Radio Jugoslavia - Yugoslavia's only external broadcast shortwave station; it broadcasts to all world regions in eleven languages.

Radio Korea - RKI (Radio Korea International), an international broadcast service. Information and connection to live Real Audio broadcasts. RKi brings 10 languages news and Korean songs

RFA: Radio Free Asia - Radio Free Asia (RFA) is a private, non-profit corporation broadcasting news and information in 9 languages to listeners in Asia

Radio for Peace International - Radio for Peace International (RFPI) is a Global Community Radio Station located in Costa Rica, Central America that broadcasts progressive news on shortwave radio and the internet on topics of Peace, Human Rights and the Environment. RFPI gives a voice to the voiceless by promoting democratic communication.

Radio Exterior de Espaņa - Emits daily 24 hour shortwave radio broadcast from Spain and targets international listeners who wish to find out about Spain and also Spaniards living abroad, who wish to keep abreast of news at home.

Radio Denmark - Information about the activities of the Danish Broadcasting Corporation including news from Denmark and schedules relating to specific radio and television programmes.

Radio Canada International - The radio voice of Canada broadcasts daily programs in French, English, Spanish, Arabic, Chinese, Russian and Ukrainian, on shortwaves, satellite and via RealAudio.

Hungarian Radio - Radio Budapest is the external service of Hungarian Radio Company Limited, the public service broadcasting organisation.

Radio Bahrain - Round the clock, Radio Bahrain broadcasts on 96.5 and 101 mHz FM Stereo, 1584 kHz mediumwave, and 6010 kHz shortwave.

Radio Amanecer Internacional - A Spanish-speaking gospel station operating in Santo Domingo, Dominican Republic, this station broadcasts on 610 and 1570 kHz, as well as, on 6025 kHz.

The Overcomer Ministry - Christian radio station 'The Overcomer' providing broadcasts via shortwave.

Radio Austria International - The radio voice of the Government of Austria broadcasts worldwide in numerous languages.

Radio Lithuania - Broadcasts to Western Europe on AM/FM and shortwave 9710 kHz, to Russia on shortwave on 9555 kHz, and to North America on shortwave on 9855 kHz.

Israel Radio - Israel Broadcasting Authority guide to the IBA radio networks known in Hebrew as Kol Israel - the Voice of Israel.

Islamic Republic of Iran Broadcasting - Broadcasts national and international programs locally and to all world regions in over 30 languages on mediumwave FM, TV, RealAudio/TV and on shortwave.

In Touch Ministries - Broadcasts Bible teachings in 15 languages to all world regions on local media such as mediumwave, TV and FM, via international shortwave radio and Internet radio and TV.

Deutsche Welle - Germany's International Broadcasting Station with links to numerous pages in multiple languages containing program schedules, and live audio feeds.

China Radio international - The People's Republic of China External Service broadcasts featured programs, commentary and news via FM and shortwave to most of the world's regions using English, German and Spanish.

Mizuho products - Mizuho Tsushin Co. was a small Japanese manufacturer of QRP radios and kits, shortwave receiver accessories, and AM broadcast band receiver kits and antennas

Rig to Soundcard Interface by M0UKD - Practival project that contains two isolation transformers, one for AF from the tranciever to the line in on a soundcard, and one from the audio out of the soundcard back to the mic / data input of the radio. Both of which are variable inside the interface via two preset resistors.