The 810 is a 150 watt triode with a mu of 36. Maximum frequency for full power is 30 MHz. Developed by RCA as shown in the first example. The second example was made by Amperex, the third by GE and the fourth is a Ken-Rad. The 810 made by Taylor had minor differences. The 1627 was an 810 with a 5 volt filament.
Length = 9.06" Diameter = 2.25"
Max voltage = 2250
Max current = 275 ma
Fil voltage = 10
Fil current = 4.5 amps GOTO INDEX