[Amps] 4 x GU-81 Grounded Grid Penthodes

[Máximo EA1DDO_HK1H]

Hi all,

I found a schematic with GU81 grounded grid.
What you think?

http://ru3ga.qrz.ru/LAMP/200401.htm

By the way, How much output power can we expect from GU81 GG ?

Thanks

73, Máximo - EA1DDO