Is there a rectifier spec yet?
FWB. 12 x 10A10 diodes in each of the 4 x legs. 48 x diodes in total.
The 10A10 is rated for 1 kv @ 10 amps CCS...and has a 600 amp surge rating. Dirt cheap.
No load B+ is aprx 6.2 kv.
HB FWB board will be mounted with just 2 x standoffs. 1 at the top..and bottom of the board..and in the center line of the board. Stay tuned. He has a 1/2 dozen more amplifiers in for repair, and severe time constraints.