As pic. shows: 4 pieces of ultra rare TOSHIBA 6GB8 beam power tubes from private collection. Never ever used in their original boxes plus boxes for a pair. Additionaly tested/checked on RPG70 tube tester with EL34/6CA7 parameters. Emmission of all 4 tubes is in the range of 55-63 mA ("good" starts at 27 mA for EL34). No gas, no shortcuts, pretty good white stamps which are very sensitive. So all are carefully fixed with a faint film of transparent sealing paint. (6GB8 is etched and occures no need to be fixed...). Quad will be sold "as is" - no return, no warranty. Free shipping as registered mail. (Paypal +4.5%). Exchange with a vintage quad TUNG SOL 6550 (bp) appreciated!
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