[Amps] More on the 811H

[Daniel Hileman]

Thanks for the input! Problem solved....pulled the bad tube, Plate current went to ZERO and amp is nice and cool. New tubes on order! Thanks Everyone...simple fix, I LOVE those kind!

73,
Daniel N9WX

> Date: Thu, 28 Jan 2010 15:10:46 +0800
> To: n9wx at hotmail.com; amps at contesting.com
> From: vk6apk at bigpond.com
> Subject: Re: [Amps] More on the 811H
> 
> 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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