Posted in DXZone - Ham Radio 3900 Club iz4wnp 30 Gennaio 2022 0 Likes 13 Views The 3900 Club began in the 1960’s as a Sunday morning net of a dozen ham radio operators in, and around, the Sioux City, Iowa, area. The club was formally organized in September, 1969. Author: iz4wnp Website Related Articles 0 14 IARU HF band plan 0 19 VE2CLM Club Radio Amateur de la Rive Sud de Montreal 0 14 Top 5 Homebrewed HF Antennas for Portable Ham Radio Operations 0 18 CW Operators QRP Club Inc.