Hi Shep....as far as output tubes go and rebiasing....check this site https://ssl.eurotubes.com/cart/index.php?page=view_submenu&category_id=6&PHPSESSID=c95f1659c9ab1178e17f0c18e25f5360 as well as http://thetubestore.com/index.html Just let them know what amp you will be installing tubes to and...
