On 16/09/17 03:16, Edward R Cole wrote: > But seriously no 3-KHz phone should be used since one QSO would occupy > nearly 50% of the 7-KHz wide band. We've had these bands in Europe for years and AFAIK nobody uses voice modes. The IARU R1 bandplan suggests a maximum bandwidth of 500 Hz. 73, Richard G4DYA