Carl wrote:
> That looks like a good driver tube, less glow than a 4X1 also. Typical
> Class C Ruskie junk but it might work OK as a GG linear or triode
> connected modulator in Class B.
> Price is no bargain either.
I was referring more to the heating qualities. A pair of them will
reportedly put out 3KW of RF on HF. No fans required. They are, or were
apparently fairly popular in Europe at one time.
73
Roger (K8RI)
>
> http://www.zeitmann-tubes.com/MilitarySurplus/NosRussianMilitaryTubes/GU81M.htm
>
>
>
> Carl
> KM1H
>
>
> ----- Original Message ----- From: "Roger" <sub1@rogerhalstead.com>
> To: "Carl" <km1h@jeremy.mv.com>
> Cc: <donroden@hiwaay.net>; <Amps@contesting.com>
> Sent: Monday, March 29, 2010 12:09 PM
> Subject: Re: [Amps] 'good engineering'
>
>
>>
>>
>> Carl wrote:
>>> Swap them for a litter of 4-1000A's and then hou can heat and light
>>> at the same time.
>>>
>> Awh, come on now Carl, a pair of GU81B's makes the best basement
>> space heater around.
>>
>> 73
>>
>> Roger (K8RI)
>>> Carl
>>> KM1H
>>>
>>>
>>>
>>>
>>>
>>>> Thanks !! My shack is in a basement room and stays around 60 degrees
>>>> even in the summer. I usually run a 1500 watt space heater.
>>>> Hummmmm.... maybe three 5000s would totally replace the space heater.
>>>> Problem is I only have a single SB-220 transformer.
>>>>
>>>> Don WA4NPL
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> Quoting "James Colville" <jimw7ry@gmail.com>:
>>>>
>>>>
>>>>> If you want to run a 562 (7.5 volts @75 amps) watt filament in your
>>>>> shack.... That's your prerogative....
>>>>>
>>>>>
>>>>> 73
>>>>> Jim W7RY
>>>>>
>>>>>
>>>>>
>>>>> On Sun, Mar 28, 2010 at 7:12 PM, <donroden@hiwaay.net> wrote:
>>>>>
>>>>>
>>>>>> If all I have on hand are a few 4CX5000s with sockets and filament
>>>>>> transformers, are you telling me that I should not use them ?
>>>>>>
>>>>>> Don WA4NPL
>>>>>>
>>>>>>> Quoting "Alex Eban" <alexeban@gmail.com>:
>>>>>>>
>>>>>>>
>>>>>>>> Tell me guys.
>>>>>>>> Who's idiot enough to build a 5 kilowatt amplifier and use it
>>>>>>>> at the 1,5
>>>>>>>>
>>>>>> kW
>>>>>>
>>>>>>>> level?
>>>>>>>> Are we kidding ourselves or not?
>>>>>>>> Alex 4Z5KS
>>>>>>>>
>>>>>> _______________________________________________
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>>>>>>
>>>>>>
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>>>
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>>>
>>>
>
>
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