The CBI will file its first chargesheet tomorrow into the 2G spectrum scam against former Telecom minister A Raja and some of his close aides besides a couple of real estate companies for allegedly defrauding the exchequer. AIR correspondent quoting CBI sources reports, the extent of loss to the state exchequer may not be included in this charge sheet as the Telecom Regulatory Authority of India is yet to complete the process of ascertaining the loss on allocation of spectrum to all operators between 2001 and 2008. The chargesheet is likely to cover the allegedly criminal conspiracy behind the allocation of spectrum during 2007-08 by Raja, the then Telecom minister.