EchoStar has sold another $2.6 billion in spectrum to Elon Musk’s SpaceX, giving the wireless and pay-TV company a stake of about 3$11 billion. The transaction, announced Thursday along with the company’s third-quarter results, builds on a $17 billion spectrum deal between the companies last September. On the SpaceX end, it makes Musk a bigger player in the wireless business. In addition to the financials and the spectrum deal, the company announced that co-founder and chairman Ch ...