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



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.






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