The biggest bottles I ever saw were in a surplused Navy shore station
rig at the NAS Olathe K0NAB ham club station. PP 2000T's with 1500T's
as modulators.
We usually used a 32V1 to drive a modified BC-610 but when the going got
rough for phone patches on 20 or 15M the monster got fired up.
That was some serious power, and it went to 6el Telrex yagis that
survived.
Carl
KM1H
.
----- Original Message -----
From: "Gary Smith" <Gary@doctorgary.net>
To: <amps@contesting.com>
Sent: Wednesday, November 12, 2008 8:03 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@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
>> >
>> > _______________________________________________
>> > Amps mailing list
>> > Amps@contesting.com
>> > http://lists.contesting.com/mailman/listinfo/amps
>> >
>>
>>
>
>
> _______________________________________________
> Amps mailing list
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> http://lists.contesting.com/mailman/listinfo/amps
>
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