[Amps] help with corona discharge

[Paul Kraemer]

My first big rig was pair of 833A, big ugly bottles that really put out when 
they were a glowin orange
K0UYA
----- Original Message ----- 
From: "Gary Smith" <Gary at doctorgary.net>
To: <amps at contesting.com>
Sent: Wednesday, November 12, 2008 7:03 PM
Subject: Re: [Amps] help with corona discharge


> Heh,
>
> I still have a few 250TH and have a 750TH in good shape & one that
> looks as new but has a popped filament. Never did use either of them.
> That 750TH is a monster.
>
> Gary
> KA1J
>
>> My first big amp was PP 250TH's in 1957. I had them a bright orange a
>> few times. Went to the 4 x 1's a decade later when freebie BCB pulls
>> were everywhere around here, built my last one in the late 80's.
>>
>> Now have amps with 250TH's and 304TL's for my return to AM. Those TL's
>> throw out so much light you can read a book.
>>
>> http://groups.yahoo.com/group/glowbugradio/?yguid=347629384
>>
>> Still looking for a couple of good 861's.
>>
>> Carl
>> KM1H
>>
>>
>>
>> ----- Original Message ----- 
>> From: "Gary Smith" <Gary at doctorgary.net>
>> To: <amps at contesting.com>
>> Sent: Wednesday, November 12, 2008 6:47 PM
>> Subject: Re: [Amps] help with corona discharge
>>
>>
>> >I personally miss the tube glow from the first amp I built. It had
>> > that beautiful 4PR1000A with 6KV on the plate.
>> >
>> > That glow was a thing of beauty.
>> >
>> > Gary
>> > KA1J
>> >
>> >> 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
>> >
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>> >
>>
>>
>
>
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