Hi Basil,
here is the source directly,you can find all info;
http://www.aef.se/Flygvapnet/Tidskrifter/FV_Nytt/Flygvapennytt_1972-2_och_3.pdf
In this link above provided by Hesham, pages 28 + 29 describe the radar equipped Tunnan project rather detailed. As one who does not speek swedish but always wanting to know more about the radar and its installation considerations, I have generated an AI supported translation.