When All News KCBS 740 added an FM frequency almost two years ago, the natural question was when would KGO-AM add an FM channel, too. But Citidel, the owner of KGO-AM, was in Chapter 11, and acquiring an FM station was out of the question. Still the trend of news and news/talk formats going to FM hasn’t stopped. Last week in Atlanta, the dominant AM news/talk station, WSB-AM 750, announced it is adding a 24-hour simulcast on FM.