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I did a google search but didnt find much except some generic explainations that really didnt talk about radio stuff.

I just watched a couple of videos on Youtube, they were both for the 811H so the maximum voltages are different, I expect that if I stay below the Max recommended in the manual I should be Ok. I am guessing my Tube failure was just a bad tube and not user induced ( at least I hope not ) ..
The new tubes are staying well below the max plate current and I am keeping the grid current under the max recommended of 150mA. I did get a response from Ameritron and they are going to send me a replacement tube since the amp is less than 3 months old. They also said that every once in a while they do get some bad tubes from the manufacturer that fail realatively quick, what ever thats suppose to mean.

Anyway, the amp is back working great and I am getting some good signal reports so I am happy.

<blockquote data-quote="W1MSG" data-source="post: 240365" data-attributes="member: 13274">I did a google search but didnt find much except some generic explainations that really didnt talk about radio stuff. I just watched a couple of videos on Youtube, they were both for the 811H so the maximum voltages are different, I expect that if I stay below the Max recommended in the manual I should be Ok. I am guessing my Tube failure was just a bad tube and not user induced ( at least I hope not ) ..The new tubes are staying well below the max plate current and I am keeping the grid current under the max recommended of 150mA. I did get a response from Ameritron and they are going to send me a replacement tube since the amp is less than 3 months old. They also said that every once in a while they do get some bad tubes from the manufacturer that fail realatively quick, what ever thats suppose to mean.Anyway, the amp is back working great and I am getting some good signal reports so I am happy.</blockquote>

[QUOTE="W1MSG, post: 240365, member: 13274"] I did a google search but didnt find much except some generic explainations that really didnt talk about radio stuff. I just watched a couple of videos on Youtube, they were both for the 811H so the maximum voltages are different, I expect that if I stay below the Max recommended in the manual I should be Ok. I am guessing my Tube failure was just a bad tube and not user induced ( at least I hope not ) .. The new tubes are staying well below the max plate current and I am keeping the grid current under the max recommended of 150mA. I did get a response from Ameritron and they are going to send me a replacement tube since the amp is less than 3 months old. They also said that every once in a while they do get some bad tubes from the manufacturer that fail realatively quick, what ever thats suppose to mean. Anyway, the amp is back working great and I am getting some good signal reports so I am happy. [/QUOTE]

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