How is a ESL driven directly by tubes?

[ak_47_boy]

No output transformers, i saw this done someware i can't find it again.

 

[el`Ol]

Here is a direct drive thread:
http://www.diyaudio.com/forums/showthread.php?s=&threadid=69300&highlight=

A second question if it is allowed to expand the topic:
Does anybody have the schematic of the Lundahl magamp? I ask myself whether it is possible to build a high voltage version with selenium diodes.

 

[ak_47_boy]

I have another quick question (sry it doesent really relate much to the thread title). Are there any formulas for stator spacing, wire sizes, voltages ect.

 

[Tweeker]

Brian Beck's extreme example, direct drive no stepup parallel 833 bridge SRPP amplifier, with + and - 4000V rails. 4 833s per channel. Drives Quad ESL-63s.