[Boatanchors] 120 - 240vac and output

[Ray Friess]

It will not give the amp more power input or output.   The main reason 
for 220 over 115 is that
the amp draws less current.   Do the math ....   P =  I times E.     The 
higher the line voltage,
the lower the current to generate the same power...
     The lower drawn current is claimed to make the tubes last longer 
... but I have heard from some
that it makes no difference on tube life.   A tube is designed to draw X 
amount of current at a
certain power level...   A tube has an unknown life span at a certain 
voltage and current limit, and
I dont know that using a lower voltage or current is going to lengthen 
that life appreciably...
As I've said, I've seen arguments on both sides as well as heard many 
personal experiences given..
     I have two 30L-1 linears and an SB 200 ...  all are wired for 115 
(or 120 if you will) ...
mostly for convenience because there was already 115 in the room I 
turned into a shack...   Just
regular house wiring...
Ray  wa7itz

George KB2Z wrote:

> Thanks for all the insightful replies. I was asking because when 
> learning electronics one of the first things taught was "theres no 
> free lunch". I have been casually thinking of another amp and one 
> thing I often see is "1000W with amp wired for 120. Should do 1200W if 
> changed to 240". At home I never saw that but did not want to debate 
> it. I guess my 120 comes from a nuclear plant.
> Again thanks, 73 George KB2Z
>
>
> At 06:53 AM 11/24/04 -0500, you wrote:
>
>> Can someone in the know clear up the question of whether 240vac will 
>> give an amplifier a power boost over a 120vac line?  This is assuming 
>> that the 120vac is healthy and can handle the input amperage required 
>> by the amplifier, (no dimming or blinking) without blowing any house 
>> fuses or breakers.
>> Thanks in advance, George KB2Z
>>
>>
>> _______________________________________________
>> Boatanchors mailing list
>> Boatanchors at mailman.qth.net
>> http://mailman.qth.net/mailman/listinfo/boatanchors
>> ** List Administrator - Duane Fischer, W8DBF/W9WZE **
>> ** For Assistance: dfischer at usol.com **
>> $$ For vintage radio info, see the HCI web site $$
>> http://www.w9wze.org
>
>------------------------------------------------------------------------
>
>_______________________________________________
>Boatanchors mailing list
>Boatanchors at mailman.qth.net
>http://mailman.qth.net/mailman/listinfo/boatanchors
>** List Administrator - Duane Fischer, W8DBF/W9WZE **   
>** For Assistance: dfischer at usol.com **         
>$$ For vintage radio info, see the HCI web site $$      
>http://www.w9wze.org    
>
>  
>