(SOLD OUT) 183=483 Sylvania NOS Power Triode original boxes 1940's

0 pair) 183=483 Sylvania NOS Power Triode original boxes 1940's 
0 tube) 26ma Gm=2050
0 tube) 28ma Gm=2060

Matched on Amplitrex
Vplate=250V
Vgrid=-60v
Good Iplate = 25-30ma
Good Gm = 1700

(183 is electrically similar to type 45, but has 5V filament @ 1.25A, mu=3.2, Vplate = 250 volts)
(45 has a 2.5V filament)