[Amps] More on the 811H

[Alek Petkovic]

Pull the tube and see if the symptoms disappear.

Just as an aside. When the amp is run on 245V AC, here in Australia, 
the voltage measured on the filament pins, with all 4 tubes lit up, 
is 7.15V AC. A bit on the high side you could say. Could even call it 
scandalous.

73, Alek.

At 01:21 PM 28/01/2010, Daniel Hileman wrote:

>I looked at it, and the relay does not appear to be stuck, but I 
>noticed one of the tubes was not lit up...so my next question, can a 
>bad tube cause there to be Plate current when not keyed? Could that 
>be the culprit? What are some of the symptoms of a faulty tube? 
>Everything seems fine, except for the plate current/heat issue. I 
>was hoping to just be able to clean the relay and that would fix it, 
>but the relay does not seem to be the issue.
>
>
>Thanks and 73,
>Daniel N9WX
>
>
>
>
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