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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Actuator/Positioner problem
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<blockquote data-quote="Terryl" data-source="post: 1049276" data-attributes="member: 369937"><p>You need to check the voltage output with a load on it.</p><p></p><p>A resistor load can be subbed out for the jack, but you need to know two things first, one is the DC current load from the jack, and two is the DC voltage. (you know that is 36 volts DC)</p><p></p><p>So volts times amp equals watts, you need to know this to get the right wattage resistor or it will burn up.</p><p></p><p>Example: 36 volts times lets say 1 amp, equals 36 watts, so a 36 watt 36 ohm resistor will work out fine. (higher the resistance the lower the wattage)</p><p></p><p>Now if you don't have access to big power resistors, then three 12 volt automotive light bulbs tied in series will also work, this will load down the power circuit enough to give you a correct DC voltage reading, if it is over 36 volts by more then 3 or 4 volts then you have a problem.</p><p></p><p>Also check the DC output with the volt meter set to AC, you should read very little AC voltage (under 1 volt) if more then that then the voltage regulator circuit is FUBAR.</p><p></p><p>As to a 36 volt power source, 3 car or other 12 volt battery's can be used, tied in series they will supply 36 volts, but be careful, if the jack is shorted you may burn something up, look at the DC fuse rating on the positioner, (or its rated DC current output) use an inline fuse of the same rating to protect the setup.</p></blockquote><p></p>
[QUOTE="Terryl, post: 1049276, member: 369937"] You need to check the voltage output with a load on it. A resistor load can be subbed out for the jack, but you need to know two things first, one is the DC current load from the jack, and two is the DC voltage. (you know that is 36 volts DC) So volts times amp equals watts, you need to know this to get the right wattage resistor or it will burn up. Example: 36 volts times lets say 1 amp, equals 36 watts, so a 36 watt 36 ohm resistor will work out fine. (higher the resistance the lower the wattage) Now if you don't have access to big power resistors, then three 12 volt automotive light bulbs tied in series will also work, this will load down the power circuit enough to give you a correct DC voltage reading, if it is over 36 volts by more then 3 or 4 volts then you have a problem. Also check the DC output with the volt meter set to AC, you should read very little AC voltage (under 1 volt) if more then that then the voltage regulator circuit is FUBAR. As to a 36 volt power source, 3 car or other 12 volt battery's can be used, tied in series they will supply 36 volts, but be careful, if the jack is shorted you may burn something up, look at the DC fuse rating on the positioner, (or its rated DC current output) use an inline fuse of the same rating to protect the setup. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Actuator/Positioner problem
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