[Amps] 4 x GU-81 Grounded Grid Penthodes

[n8de at thepoint.net]

Here is the info you need:

Specification

Model number: GU-81M
Manufacturer: Reflektor (Russian)
Max anode dissipation: 450 W
Max g2 dissipation: 120 W
Max g1 dissipation: 10 W
Max g2 voltage: 600 V
Max anode voltage: 3000 V
Max anode current: 600 mA
Max g2 current: 120 mA
Max g1 current: 20 mA
Input capacitance: 29 pF
Output capacitance: 24 pF
Anode to g2 capacitance: 0.1 pF
Max frequency: 50 MHz

Looks like 900 watts output with 67% efficiency.

73
Don
N8DE



Quoting Máximo EA1DDO_HK1H <ea1ddo at hotmail.com>:

>
> 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
>
>
>
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