Thanks to all who have responded so far. I may have ask this same question a few months ago
To Almarg, I think I need to put my glasses on, because as you noted before, the BAT VK-200 only has XLR inputs. They DO have RCA outputs but that is not going to help my case.
I did see in the AG "Cable Category" that JW Cables who uses a cryo-treatment on both his speaker wire and interconnects offers an XLR to RCA cable. along with standard RCA to RCA and XLR to XLR. I am sure other brands that other members have recommended, like Wireworld or Transparent may offer similar mixed connector IC's
I know about the reverse polarity requirement of the CJ PL14L; I owned a CJ PV-8 pre-amp back in 1988, and had to reverse the speaker leads. Therefore, the speakers are in correct phase.
As far as rolling the tubes, the member who sold me the PV-14L SE claimed that when he had the CJ do the "SE" upgrade, they retubed the unit with M8080 tubes. . He claimed they have about 1000 hours on them, but were rated for 5000 to 10,000 hours. I have to recheck with him about the tubes.
Lastly, I need to look at your 2nd paragraph more closely about using the Jensen Transformer which I want to avoid, not because of the cost, but I don't want to add another freakin box to the system. Also, I am not sure I completely understand the RCA and XLR IC arrangement you explained above. Nevertheless, I will keep you and others posted..
Happy Holidays to all......SJ