Do i have to rebias?

kyemack45687 Junior Member Posts: 73	Do i have to rebias? Aug 19, 2009 12:35:23 GMT -5 Quote Select Post Deselect Post Link to Post Member Give Gift Back to Top Post by kyemack45687 on Aug 19, 2009 12:35:23 GMT -5 I have a Nitro with KT77s. I'm looking to either go with more JJKT77's or some EL34B's. Will I have to bias the amp when switching these tubes? What kind of rating should I look for on power tubes?