what is vertical antenna

Flags and Pennants - Excellent low-noise receive antennas originated by EA3VY and optimized for 160 meters by K6SE

Alfa Golf 2 Division - 2 Division Alfa Golf DX Group

Lima Delta CB DX Group - Long Distance comunications in 11MT LD - official web site

Egyptian Hams - List of ham radio operators in Egypt

Clipperton Island 2000 DX-ped. - Web site for March 2000 Clipperton Island DXpedition

Aland Island DX-Ped. - Recurrent expeditions to OH0

RSGB IOTA pages - Islands On The Air Programme, Latest IOTA News, IOTA Rules, Committee

Cayman Islands - CARS - Cayman Amateur Radio Society

Democratic Rep. of Congo - ARAC - Association des Radio Amateurs du Congo

Iceland - IRA - Islenzkir Radioamatorar

Ireland - IRTS - Irish Radio Transmitters Society

Luxembourg - RL - Luxembourg Amateur Radio Society, Reseau Luxembourgeois des Amateurs d'Ondes Courtes

Netherlands - VERON - Home for dutch speaking radioamateurs, wordwide. We also provide information about our hobby in english and other languages. Hamradio guide for visitor to Holland

Oman - ROARS - Royal Omani Amateur Radio Society

Poland - PZK - Polski Zwiazek Krotkofalowcow, Polish Amateur Radio Union

Portugal - REP - Rede dos Emissores Portugueses

Switzerland - USKA - Union Schweizerischer Kurzwellen-Amateure

Radio Club Tegucigalpa - In this page show interest information on Ham Radio in Honduras.

TI2DJA Mario - Ham radio in Costa Rica, by TI2DJA Mario A Bola?os S

YY5OFW & YY5OFX - Information about Venezuela, frequencies, maps, photos, history, and related links

EA5FWW Francisco - EA5FWW Francisco S?nchez Murcia Spain

Nott Ltd. - All band 10 thru 80 meters antennas. Park 'n Talk telescoping whip antenna mounts, folded unipole antennas

Telegraph Office - A tribute to morse telegraphy, resource for wire and wireless telegraph key collectors and historians by Neal McEwen, K5RW

CAMSAT - CAMSAT is a non-profit organization dedicated to the development of amateur satellite in China

Lowpass filter for 5MHz - The following lowpass filter was built using the tables in the arrl manual, it is a 5 section one and seems to work ok