[Boatanchors] 120 - 240vac and output

[Vic Rosenthal]

Dave Roscoe wrote:

> I followed most of what you said.
> But why FOUR TIMES greater here ?
> The resistance of the  AC feeders / conductors is the same.
> The current is doubled,  (or halved) , so the  IR voltage  drop difference
> is factor of 2, no ?

The PRIMARY voltage drop is 2x, as you say.  But remember that the transformer 
is now multiplying the voltage from 120 to 3000 (or whatever) instead of 240 to 
3000.  So any voltage drop in the primary will have twice as much effect on the 
secondary voltage.  Twice the primary drop thus means four times as much 
secondary drop.

By the way, I didn't say anything about relative signal strength.  My point was 
just to explain why the additional voltage drop caused by line resistance is 
greater.

-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco