Valve Data confusion.

[bob orbell]

HI all, a short time ago I changed my modified Pre III, from self biased cathode follower, to CF with active load and followed the CD in Morgan Jones book using two Mullard E88CC tubes, the top valve is feed by 285volt's as in the book, I now read from many Valve Data pages that that particular valve's Va max is 220volt's, it works very well, but I need to make sure that I am not going to over volt the valve. I have in my valve box, two 6N1P tubes, the Data for these is also confusing, some pages say Va max 300, others 250, heater current appears to be + 100% so that will be 1.2 amps as apposed to 0.6, this is not a problem, as I use two power supply's. Can the more advanced members please comment. Thank's. BOB