Description
(1 set of 10 tubes) 448A Western Electric “TIPPED TOP” used/test like new 85-95% with “D” getter 1960’s
1 set of 10 tubes) 448A WE “TIPPED TOP” used/test like new 85-95% with “D” getter 1960’s
10 tubes for $499.99
Tested on Amplitrex
1) 27.4ma Gm=27,200 (6552)
1) 28.2ma Gm=25,200 (6552)
1) 25.0ma Gm=25,800 (6539)
1) 29.4ma Gm=27,100 (6526)
1) 27.0ma Gm=26,600 (6552)
1) 25.8ma Gm=25,300 (6552)
1) 30.0ma Gm=27,100 (6526)
1) 31.4ma Gm=27,700 (6552)
1) 27.0ma Gm=27,300 (6552)
1) 25.0ma Gm=26,000 (6552)