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(!!!!!) (Recommended Single) 300B Western Electric used/tests like new 1997 re-boxed (58ma) (98%) good getter (Serial #204873)

$ 499.99

1 tube) 300B Western Electric used/tests like new 1997 re-boxed (not in original box) good getter

 

Test Data:

300B REFERENCE NOS TEST DATA:

Vplate=300V, Vgrid=-58, Iplate=60ma Gm=5500 (NOS reference)

Vplate=400V, Vgrid=-80, Iplate=85ma Gm=5800 (NOS reference)

 

300B Serial #204873 TEST RESULTS: (early serial # from 1997)

Vplate=300V, Vgrid=-58, Iplate=58.0ma (98%) Gm=5050 (97%)

Vplate=400V, Vgrid=-80, Iplate=78.0ma (92%) Gm=5350 (92%)

 

 

 

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