[Amps] Weird Tubes

[Carl]

One of my current AM amps uses a pair of WW2 radar 6C21's which is a pulse 
rated 450TL that was run with a higher filament voltage in order to get more 
emission and a short life.

I run them as a 450TL and the glow is sure nice.

Carl
KM1H


----- Original Message ----- 
From: "Col. Paul E. Cater" <paulecater at gmail.com>
Cc: "Amps reflector" <amps at contesting.com>
Sent: Thursday, January 30, 2014 11:36 AM
Subject: Re: [Amps] Weird Tubes


> As a teen, I found an old ground-to-air transmitter from WWII.  It was 8"
> tall and ran a pair of 450TL finals.  It's guts looked like something in
> the background of a Frankenstein movie.  It was multipurpose heating and
> lighting the room at no extra costs.
>
> Being young and stupid, I put a penny in the screw-in type fuse box to get
> it enough current to run.
> A wonder I didn't burn the house down.
>
> Paul
> WD8OSU
>
>
>
>
> On Thu, Jan 30, 2014 at 11:26 AM, Carl <km1h at jeremy.mv.com> wrote:
>
>> One of my dads friends was an old time ham and I was invited to his 
>> house.
>> Unfortunately I dont remember his call but it was W2B?? and this was 
>> around
>> 1954-55.
>>
>> On the roof was a HB 3el 20M yagi. In the house was the PP VT-127A amp
>> along with a SX-28. The transmitter was home brew and ran on 20M CW only.
>> On the floor in the corner was a big pole pig transformer.
>>
>> When run at his CW speed the anodes were white. Many years later when I
>> had a better understanding I had to assume that the 1000W input rule was
>> being seriously abused (-;
>>
>> Carl
>> KM1H
>>
>>
>> ----- Original Message ----- From: "Fuqua, Bill L" <wlfuqu00 at uky.edu>
>> To: "Barrie - Yellowstone Photo" <barrie at yellowstonephoto.com>; <
>> amps at contesting.com>
>> Sent: Wednesday, January 29, 2014 10:32 PM
>> Subject: Re: [Amps] Weird Tubes
>>
>>
>>   I picked up an old HB amplifier that had two VT-127 triodes in it at
>>> Dayton a few years back.
>>> Just could not resist it.
>>> 73
>>> Bill
>>> ________________________________________
>>> From: Amps [amps-bounces at contesting.com] on behalf of Barrie -
>>> Yellowstone Photo [barrie at yellowstonephoto.com]
>>> Sent: Wednesday, January 29, 2014 6:01 PM
>>> To: amps at contesting.com
>>> Subject: [Amps] Weird Tubes
>>>
>>> I recently built a class C amp using a push-pull pair of VT-127As. 
>>> These
>>> tubes
>>> are WW2 radar
>>> tubes; sort of a cross between a 100TH and 100TL.  The glass is much
>>> different.
>>> Looks like a spaceman.
>>> The partially completed modulator will use a pair of VT-327As; a very
>>> similar
>>> tube, but with twice the
>>> filament power.  The setup should put out 500 watts of AM, or CW.
>>>
>>> The reason I'm building this rig is that a high school buddy, Scott,
>>> W7TLZ's
>>> father (a ham) built him
>>> a pair of VT-127As for 40M CW.  When I saw that rig, with the plates
>>> glowing
>>> bright red each time
>>> hit the key, I almost cried.
>>>
>>> Then I went home and looked at my single 6L6 rig.
>>>
>>> Well, Scott is now SK, so the rig I'm building is the "W7TLZ Memorial
>>> Transmitter".
>>>
>>> 73, Barrie, W7ALW (since 1950)
>>> _______________________________________________
>>> Amps mailing list
>>> Amps at 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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