I know I have at least one NIB GE 592 and maybe another. There was a 50's CQ
VHF Manual circuit using a pair for a 2M KW amp. Ive been collecting TX
tubes for over 50 years and have a rather interesting sampling and have put
several to use.
Carl
KM1H
------ Original Message -----
From: "Barrie Smith" <barrie@centric.net>
To: <amps@contesting.com>
Sent: Sunday, August 15, 2010 4:35 PM
Subject: Re: [Amps] Glass tube plate color
> As long as we're rambling on about old tubes and glowing plates, one tube
> I'd really like to play with someday is the 592/3-200A3.
>
> I have several that hipot and filament test good.
>
> That tube just "looks" like it would take and make a lot of heat!
>
> I've never seen any mention of a socket for them.
>
> Many years ago I did see one mounted. As I remember, and it's been a long
> time, the filament pins were through a hole in a square metal bar, which
> had
> a slot cut so that a set-screw could compress the hole around the pin.
>
> 73, Barrie, W7ALW
> ----- Original Message -----
> From: "Carl" <km1h@jeremy.mv.com>
> To: "Barrie Smith" <barrie@centric.net>; <amps@contesting.com>
> Sent: Sunday, August 15, 2010 2:10 PM
> Subject: Re: [Amps] Glass tube plate color
>
>
>> You are correct Barrie, the VT-127A was aka the 100TS for "Special" in
>> house. Eimac has been mixing up standard parts almost as long as they
>> have
>> been in business. The original 150T was a pair of 75T's in one envelope
>> which morphed to the 152T and later with four into the famous 304 twins.
>>
>> These days hams use the YC-156 which is a 3CX15000B7 internals with a
>> 3CX5000 anode.
>>
>> A good friend of my dad was a ham who ran a pair of VT-127A's on 20M CW
>> only using a pole pig in the 50's. Just keying on CW the plates were
>> almost white so Im rather sure he wasnt strictly adhering to the 1000W
>> input rule....typical open rack construction. With some air you could
>> probably run them safely at or close to 250T specs.
>>
>> Carl
>> KM1H
>>
>>
>>
>> ------ Original Message -----
>> From: "Barrie Smith" <barrie@centric.net>
>> To: <amps@contesting.com>
>> Sent: Sunday, August 15, 2010 2:16 PM
>> Subject: Re: [Amps] Glass tube plate color
>>
>>
>>> Bill, some answers below.
>>> ----- Original Message -----
>>> From: "Fuqua, Bill L" <wlfuqu00@uky.edu>
>>> To: "Barrie Smith" <barrie@centric.net>; <amps@contesting.com>
>>> Sent: Sunday, August 15, 2010 11:10 AM
>>> Subject: RE: [Amps] Glass tube plate color
>>>
>>>
>>> These tubes were never intended to be used as amplifier
>>>
>>> **Perhaps they were never intended to be used in amplifiers, but they do
>>> work well in class C service.
>>>
>>> This rig is just a lark, something fun to build and use on 10 and 15M
>>> AM.
>>> I
>>> had a buddy, Scott, W7TLZ, in junior high school, who's father, a ham,
>>> built
>>> him a 40M CW rig with a pair of them. That stuck in my craw for close
>>> to
>>> 60
>>> years. I lucked into several of the tubes free a couple of years ago
>>> and
>>> have now built the RF deck.
>>>
>>> but in stripline oscillators, either single tube or push-pull.
>>> There were no real efforts to match them. In oscillators you want low mu
>>> so
>>> that they will draw lots of plate current to
>>> get started quickly. I seem to recall the plate dissipation was 200
>>> Watts
>>>
>>> ** The tube is a cross between the 100TL and the 250TL. The plate is
>>> 100
>>> watts dissapation, from the 100TL. The grid and filament are from the
>>> 250TL.
>>>
>>> with a very bright glow. These tubes were driven hard is early
>>> radar and radar jammers. Often pulsed. Hams used to use them because
>>> they
>>> were very cheap on the surplus market.
>>> EIMAC even made a version with a glass tube attached to it (about 1/2"
>>> ID)
>>> and no vacuum inside to be used as a ion vacuum guage tube.
>>>
>>> 73
>>> Bill
>>> ________________________________________
>>> From: amps-bounces@contesting.com [amps-bounces@contesting.com] On
>>> Behalf
>>> Of
>>> Barrie Smith [barrie@centric.net]
>>> Sent: Sunday, August 15, 2010 12:52 PM
>>> To: amps@contesting.com
>>> Subject: Re: [Amps] Glass tube plate color
>>>
>>> Damit, Carl, that's a good question! I'll try that right away.
>>>
>>> Barrie
>>>
>>> ----- Original Message -----
>>> From: "Carl" <km1h@jeremy.mv.com>
>>> To: "Barrie Smith" <barrie@centric.net>; <amps@contesting.com>
>>> Sent: Sunday, August 15, 2010 10:45 AM
>>> Subject: Re: [Amps] Glass tube plate color
>>>
>>>
>>>> What happens when you swap positions?
>>>>
>>>> Carl
>>>>
>>>>
>>>> ----- Original Message -----
>>>> From: "Barrie Smith" <barrie@centric.net>
>>>> To: <amps@contesting.com>
>>>> Sent: Sunday, August 15, 2010 11:55 AM
>>>> Subject: [Amps] Glass tube plate color
>>>>
>>>>
>>>>> Speaking of class C, I have just completed a nostalgia rig using a
>>>>> push-pull pair of VT-127As (somewhat similar to the 100TL, but looks
>>>>> like
>>>>> a spaceman with grid and plate pins sticking out the sides).
>>>>>
>>>>> I've been bench-testing it the last few days with a wimpy power
>>>>> supply.
>>>>> Surprisingly, I'm up to 500 wattts out with 1300 volts on the plates.
>>>>>
>>>>> I have several tubes, and have tried a couple of different pairs. In
>>>>> both instances I've noticed that one tube will have a slightly
>>>>> brighter
>>>>> plate glow than the other.
>>>>>
>>>>> I'd like to have the tubes as closely matched as possible.
>>>>>
>>>>> My question is: Which tube is most likely to be the better, the
>>>>> bright
>>>>> one, or the cooler one?
>>>>>
>>>>> 73,
>>>>> Barrie, W7ALW, DN36au,
>>>>> QRV 6M, 432 & 1296 EME
>>>>> _______________________________________________
>>>>> Amps mailing list
>>>>> Amps@contesting.com
>>>>> http://lists.contesting.com/mailman/listinfo/amps
>>>>
>>>>
>>>>
>>>
>>>
>>>
>>> _______________________________________________
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>>> 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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