If things get really tough, try what I've done. I have some 12JB6's and
some 18JB6's. The final filaments can be re-directed and run via an
external xformer. It works fine. However, I just bit the bullet and
bought several pairs from reasonable sources. Given the number of hours
I use the Drake C-line each month or year, I'm sure I'll be OK until I
"check out of the net".....