FYI: here's a recent post I made regarding my humble experiences with numerous 300B's I own including WE's and the KR's:
http://db.audioasylum.com/cgi/m.mpl?forum=set&n=58904&highlight=coolhand&r=
I should add that from my feedback of users of VAC 300B based amps, the tubes are run pretty hard and perhaps it would be worth looking at the EML300Bxls as this has a higher dissipation rating than the others.
http://db.audioasylum.com/cgi/m.mpl?forum=set&n=58904&highlight=coolhand&r=
I should add that from my feedback of users of VAC 300B based amps, the tubes are run pretty hard and perhaps it would be worth looking at the EML300Bxls as this has a higher dissipation rating than the others.