The SWL QSL Museum Cambodia/Kampuchea Asia Voice of  Khmer - 1988- 6325 Khz - Station Overview QSLContributed by Hashimoto Kenji (Japan) The Voice of the Khmer (VOK) in 1988 operated via mobile and clandestine shortwave transmitters positioned along the Thai-Cambodian border. These shifting transmission locations were intentionally kept  mobile and secret to protect against attacks by Vietnamese forces and the then-ruling People's Republic of Kampuchea.