Appears to be in good working order priced at $350. There is a service on ebay that will professionally re-calibrate these devices for $139.
FOR SALE: B&K 747B Solid State Tube Tester $350
June 21, 2010 By
an analogue haven in a digital world
Appears to be in good working order priced at $350. There is a service on ebay that will professionally re-calibrate these devices for $139.