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@doctorgary.net>
To: <amps@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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> http://lists.contesting.com/mailman/listinfo/amps
>
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