Quad ESL EHT Rectifier Boards

Description

For Sale: one pair of ESL EHT Boards. These come from the U.K. and are sold by One Thing Audio, 46 Siddeley Avenue, Stoke, Coventry, CV3 1GA, England. Known as the "One Thing Audio 'Super' Board". A "new rectifier board" for the Quad ESL (or ESL 57) Electrostatic Loudspeaker. The EHT board produces the necessary polarizing voltages for proper operation of the speaker.
These are for the DIY hobbyist who is restoring a pair of these loudspeakers and needs to update these boards.
I purchased a pair of these legendary loudspeakers and sent them to Electrostatic Solutions in Kansas City for restoration. Kent, who performed his magic on the speakers, used his own boards, so I have this unused pair I do not need. The person from whom I purchased the speakers decided not to try to restore them himself, so I got these when I purchased the speakers from him.
These boards cost 96.00 UK Pounds Sterling (see catalog entry) which is US2.00.
Please ask all questions before bidding. Sales are final, no refunds or exchanges are offered.
Thanks for looking and Good Luck!