>It's a very pretty amplifier that is, of course, also quite old, c. 1966 or >so. As such, if it has its original filter capacitors they should be >replaced, along with their equalizing resistors. The 8122 replacement cost >is scary, but many have converted to other tubes successfully. ... € Steve -- would conversion to Svetlana 4cx400s or 4cx800s be do-able?