That tube is a favourite of Williams. I think he has bought all remaining KBZ's that Steven had. I have 1, I find it very alive, compared to my other rectifiers. William, what do you find are the strengths of this tube?
William, thanks for your reply. To everyone, how about the other brown base U52 with different manufacturing codes on the glass? What are your thoughts.Steve said the brown base U52 are much better than the black base. What are your thoghts on this.
Here you go Erik: http://www.ebay.com.au/itm/USED-WB-British-GEC-CV575-U52-5U4G-military-Hi-end-Rectifier-Valve-Tube-/221184426915Great tube!
And if you think that's expensive, look at this one: http://www.ebay.com.au/itm/221189874228Well at least it's new...