[AMPS] 77DX

[Ron Hooper]

Al Crespo wrote:
> 
> Have a 77DX that on transmit draws grid current, but no plate current. High
> voltage on plate checks out OK so transformer is not the problem. Any
> suggestions?
>                                                             Aloha, Al
Hi Al,

1.Is the grid current reading with or without excitation to the amp
and   how much?
2.Put the multi meter in the plate voltage position and see it drops
any   at all when you key the amp. 
3.Do you have a spare tube to try?

Need to get a few more facts before offering a suggestion.
Ron W4WA

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