[Boatanchors] 120 - 240vac and output

[Ray Friess]

What Vic says is true....   AND another thing to remember along with it 
is that that extra
200 watt difference is not going to make a BIT of difference in your 
signal strength.   The
receiving station wouldnt be able to tell the difference in your signal 
if you went from 1000
watts to 1200 watts.    In fact, the scientific fact is that in order to 
DOUBLE  your signal
strength.. you have to FOUR TIMES your power..    so adding an 
additional 200 watts to a
1000 watt signal is not going to make a bit of difference.... even in 
the worst of QRM or
band conditions....


Vic Rosenthal wrote:

> Gary Schafer wrote:
>
>> Think about this for a minute and you should be able to figure it out 
>> yourself. The only thing that changes in the amp whether it is run on 
>> 120 or 240 is the primary configuration of the transformer. The rest 
>> of the amp knows nothing of the difference. Filament voltage is the 
>> same and plate voltage is the same.
>>
>> With a however here, The plate voltage may be a little better 
>> regulated (may not drop quite as much) because of a little less 
>> voltage drop on the house wiring on 240 volts. 
>
>
> But keep in mind that the reduction in plate voltage due to primary 
> voltage drop will be FOUR TIMES greater on 120V than 240V.  The 
> primary voltage drop will be twice as great, since the current is 
> double (given the same wire size, etc.). Since the transformer will 
> need to multiply the voltage 2X more, the drop will be 4X what it 
> was.  If you have a 120V circuit using no. 8 wire going directly to 
> the service entrance, the effect will be much smaller; but most 120v 
> circuits are not like this.
>
> This explains why people say they get 1200 watts with 240 V and only 
> 1000 watts on 120, for example.
>