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charles

In article ,
wrote:
On Monday, 1 January 2018 14:27:57 UTC, Terry Casey wrote:
In article ,
says...

I am sure the mains ones had a transformer with a single digit kV
output and used a voltage multiplier (the names of Cockcroft and
Walton spring to mind).

I'm fairly certain that it was simply a very high voltage secondary
winding - no need for a multiplier.

it wouldn't make any sense to implement a valve multiplier chain.

EY51, as I recall, in Pye monchrome studio monitors

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from KT24 in Surrey, England