[Amps] Triode grounded grid amp strange failure

[Mike Waters]

I would check the plate current meter and the connections to it.

73, Mike
www.w0btu.com

On Tue, Jul 14, 2015 at 3:47 PM, Guido Tedeschi <guidoted at gmail.com> wrote:

> Hello All,
>     a homebrewed two chassis 3CX3000A7 GG amp of a friend has this strange
> failure when switched on TX:
> - no more current on plate meter
> - 200 mA of grid current with no signal
> - some power out (few hundred Watts) when driven with 40-50 W, to limit
> the grid current to less than 500 mA, but still no current on plate meter
>
> We don't have any schematic diagram
>