hifi engine

Aurex SB-66 lamps and clean drive?

Hi

I have an old SB-66 thats been sat on a shelf for some time with a few failed lamps and a blown fusable resistor. I have decided to sort the issues and recommission the amp that i bought and never used. I have a couple of questions which i would really appreciate some help with.
Firstly i cannot find any ratings for the lamps, a few have failed and need replacing and secondly has anyone any experience of using the Clean Drive system and whether it works or is it just a gimmick?

Any help, particularly on the lamps would be very much appreciated.

Thanks in anticipation.