[Amps] help with corona discharge

[David H Craig]

    FWIW  http://glow.gs35b.com/


----- Original Message ----- 
From: "Pat Barthelow" <aa6eg at hotmail.com>
To: <amps at contesting.com>
Sent: Wednesday, November 12, 2008 12:39 PM
Subject: Re: [Amps] help with corona discharge


>
>
>
> I first interpreted the comment on the blue glow observation, as meaning 
> the glow is in the air out side the tube body, but now realize that what 
> you are probably seeing is Cerenkov radiation generated inside the ceramic 
> between the plate and the next structure of the tube.  And apparently 
> being bright enough to illuminate the areas around the tube.   The cathode 
> electrons accelerating to the plate approach the speed of light, and some 
> splash, bounce into, or otherwise impact the ceramic, and the forced quick 
> deceleration of the electrons down to the speed of light in the ceramic, 
> generates the blue Cerenkov radiation.  It is kind of like breaking the 
> sound barrier phenom in air, very weird things happen and you see energy 
> in various forms emitted.
>
> Here is a picture of Cerenkov radiation in Water moderator/coolant of fuel 
> rods in a Nuke Reactor:
>
>
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>
>
> http://www.nationmaster.com/encyclopedia/Image:TrigaReactorCore.jpeg
>
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> All the best,   Pat Barthelow   aa6eg at k6bj.org
> Jamesburg Moon Bounce Team
>
> http://www.jamesburgdish.org> From: cherokeehillfarm at earthlink.net
>> To: asciibaron at comcast.net; k7fm at teleport.com
>> Date: Wed, 12 Nov 2008 11:55:26 -0500
>> CC: amps at contesting.com
>> Subject: Re: [Amps] help with corona discharge
>>
>> Every Commander amp that I have added QSK and vacuum relays to has had 
>> the
>> blue glow when looking through the cooling fins..
>>
>> The three holer on my desk, with brand new 3cpx800 tubes, glows blue. 
>> The
>> ten year old 3cx800 tubes also glow blue.
>>
>> The tubes are full output, and there is no issue.  I believe the glow 
>> which
>> appears when cut off bias is removed, may be dependant upon the trace
>> elements in the ceramic, with different types of ceramic producing 
>> somewhat
>> different colors.
>>
>> Your amp is fine, you don't need to worry, just operate.
>>
>> 73,
>>
>> Mike
>> W2AJI
>> ----- Original Message ----- 
>> From: "Steven Hanlon" <asciibaron at comcast.net>
>> To: "k7fm" <k7fm at teleport.com>
>> Cc: <amps at contesting.com>
>> Sent: Wednesday, November 12, 2008 10:28 AM
>> Subject: Re: [Amps] help with corona discharge
>>
>>
>> > > Are you, by chance, operating at 20,000 feet?
>> >
>> > nope, about 160 or so.
>> >
>> > -Steve, WM3O
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>>
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