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Satellite Systems - What to Buy - What to install
Titanium ASC1 DiSEqC Positioner
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<blockquote data-quote="Terryl" data-source="post: 1087922" data-attributes="member: 369937"><p>If the DC voltage is dropping then use bigger gauge wire out to the positioner, the voltage drop will be less at the positioner.</p><p></p><p>The smaller the wire gauge on a long run the bigger the restive load, the bigger the resistor the bigger the voltage drop.</p><p></p><p>My Vbox is rated at 4 amps at a 24 volt output, the positioner on my 10 foot dish is rated at 3 amps 24 volts under peak load,(I tested this and it was only 2.5 amps at full load) but the run out to the dish is over 200 feet, if I used 16 gauge wire the voltage drop would have been about 4 volts, this would or could have starved the motor.</p><p></p><p>I could have gone with 10 gauge wire, that would have gave a drop of only 1 volt, but instead I mounted the Vbox in a water tight box out at the dish, and ran 110 VAC to it, I still ran 12 gauge wire to the motor, but only needed 15 feet.</p><p></p><p>If your getting a drop to 14 to 15 volts, and the motor needs more, then the power supply will try to make up for the excessive voltage drop,(it will go to the maximum DC current of it's design) this will be a very big strain on the power supply.</p><p></p><p>So what I'm saying is that the wattage means nothing, it's all voltage and amperage to a restive or inductive load.</p><p></p><p>Here is a voltage drop calculator for different parameters, note that you do not see one for wattage.</p><p></p><p>[code]https://www.calculator.net/voltage-drop-calculator.html[/code]</p></blockquote><p></p>
[QUOTE="Terryl, post: 1087922, member: 369937"] If the DC voltage is dropping then use bigger gauge wire out to the positioner, the voltage drop will be less at the positioner. The smaller the wire gauge on a long run the bigger the restive load, the bigger the resistor the bigger the voltage drop. My Vbox is rated at 4 amps at a 24 volt output, the positioner on my 10 foot dish is rated at 3 amps 24 volts under peak load,(I tested this and it was only 2.5 amps at full load) but the run out to the dish is over 200 feet, if I used 16 gauge wire the voltage drop would have been about 4 volts, this would or could have starved the motor. I could have gone with 10 gauge wire, that would have gave a drop of only 1 volt, but instead I mounted the Vbox in a water tight box out at the dish, and ran 110 VAC to it, I still ran 12 gauge wire to the motor, but only needed 15 feet. If your getting a drop to 14 to 15 volts, and the motor needs more, then the power supply will try to make up for the excessive voltage drop,(it will go to the maximum DC current of it's design) this will be a very big strain on the power supply. So what I'm saying is that the wattage means nothing, it's all voltage and amperage to a restive or inductive load. Here is a voltage drop calculator for different parameters, note that you do not see one for wattage. [code]https://www.calculator.net/voltage-drop-calculator.html[/code] [/QUOTE]
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Satellite Systems - What to Buy - What to install
Titanium ASC1 DiSEqC Positioner
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