To confuse you even more, another Diana (and probably the most known one) appeared on the shortwave bands.
It all started back in 1981 under the name Pink Panthers Broadcasting Company. And the first show was put on air the 29th of March.
Later the station changed their name to Diana and also got their own transmitter. This tx was used on 7330 and 7350 kHz. The power was approx. 15 watts into a dipole.
In April 1990 Diana returned to the airwaves with almost a show every month on 7378 kHz.
The station could be contacted via the Utrecht-address.