Tung sol 6550 tube smell??

I bought new tung sol 6550 tubes for my audio research vs110. The original tubes for that amp were sventlana 6550 tubes that were great and i never noticed a smell from the amp. When i put in the tung sol reissues, i biased the amp at 55ma to save some tube life. When i had the sventlanas, they were at the recommended 65ma. So i dont know why i have a pretty strong burning smell comming from the tung sols. Is this because the tubes are new, or mabey they cant handle the bias? im very concerned, i hope my amp dont blow up or the tubes. Thanks, rob