Hi, since my last moving the 211 project is still sleeping in boxes (started building 211 stage prototype but noting more)...At the time I had in mind to use 300b as a driver or even 2A3 (but not enought headroom apparently). I bought interstage transformers meant for those tubes (1:1, 40-80 mA, 600-900R). I'm looking for alternatives. Can I use those IT for other tubes not corresponding exactly to specs. Suggestions would be very appreciated.