Re: {Collins} [Bulk] Re: [Bulk] Re: 30L-1 - convert between 115Vand 230V

["Charlie T, K3ICH" <pincon@xxxxxxxxx>]

Come on guys, there are two different arguments going on here.

It's time to end this.......

Fact #1:  IF you ignore line (feeder) loss in your house wiring and line 
cord, there is NO difference in the loss or efficiency INSIDE the 30L-1 
regardless whether it runs from 120 or 240 VAC.

Fact #2:  You WILL be drawing twice the feeder current and therefore 
incurring twice the voltage drop in your house wiring when the amp runs from 
120VAC when compared to 240 VAC.     * below.


73, Charlie k3ICH





*This dates back to the Westinghouse/Edison argument when it came down to AC 
vs. DC power distribution.    For an extreme example, lets say you're 
drawing 10 amps at 120 V through a feeder (house wiring) having a 1 Ohm 
resistance.   You'll see a 10 volt loss in the house wiring such that you 
end up with only 120V - 10V = 110V at the load.  Now, lets change the load 
to run from 240 V at the same power level.

In this case, we're only drawing 5 amps through the same 1 Ohm feeder which 
results in a 5 V drop.   The situation improves drastically since now we 
calculate our load will see  240 V - 5 V = 235V  5 V loss at 240 V is 4 
times better than a 10 V loss at 120V.


----- Original Message ----- 
From: "Gaylord Hart" <gahart@xxxxxxxxxxxxx>
To: "'Stanley M Miln'" <k6rmr@xxxxxxxxxxx>; "'Mariusz "Art" VE3PND'" 
<mdg@xxxxxxxxx>; "'collins'" <collins@xxxxxxxxxxxxx>
Sent: Saturday, November 08, 2014 4:21 PM
Subject: Re: {Collins} [Bulk] Re: [Bulk] Re: 30L-1 - convert between 115Vand 
230V


> This is wrong.  If R = 200 ohms for 220 volt operation (2 x 100 ohm 
> windings
> in series), then R = 50 ohms for 110 volt operation (2 x 100 ohm windings 
> in
> parallel).  Power is the same.