gonna be putting these into the lower power modulator - good match for the S21 - was gonna go pedestrian with 809's or 811's but I love running
funky tubes in my rigs. Gotta dig that box art. So Hytron HY 40's it is. no audiophool wants these things.
Pair of these will do real well @ 750 volts or so. not too much, but enough. "Rig here is a Eimac 5-125B modulated by Hytron hy40's".
different.