1 tube) 800=VT-64 RCA Lab Development tube charcoal black plate used/good 1940 era - round hat shape getter halo, good getter flash on glass in white box

42ma

Gm=2150

Good used Ma range 40-45ma

Good Gm = 2000-2100

Vplate=500V

Vgrid=-1V

General Information

Vfil=7.5V @ 3.25A, 35 watts, Vplate max=1250VDC, Mu=15

Introduced in 1933

transmitting triode