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dbtoutfit said:The 12v source is a ac to dc converter switching power supply.
dbtoutfit said:is it typical for a 12v power supply to drop to 11.4 volts at 6 amp pull?
Or is this a regulator problem?
I understand you cant get it form nothing but I have seen talk about putting a load on different voltage rails to increase the 12v rail or atleast make it stronger.
Like adding a sand bar to the 5v+ to increase the 12v.
Where this measurement was taken/if it is at the load point, obviously the lead drop would be there. the regulation components generally have to monitor the last point where from the load is to be connected. More expensive units have a 4 wire arrangement and the voltage feed back is taken right from the load itself. this type caters for correcting the voltage drop across leads to some extent.dbtoutfit said:is it typical for a 12v power supply to drop to 11.4 volts at 6 amp pull?
Or is this a regulator problem?
I understand you cant get it form nothing but I have seen talk about putting a load on different voltage rails to increase the 12v rail or atleast make it stronger.
Like adding a sand bar to the 5v+ to increase the 12v.
dbtoutfit said:while underload I used my MM to check.
The difference 12-11.4, indicates a possible diode in series to load. If so, it is better to set it to the required voltage+diode drop.dbtoutfit said:while under load I used my MM to check.
mvs sarma said:The difference 12-11.4, indicates a possible diode in series to load. If so, it is better to set it to the required voltage+diode drop.
mvs sarma said:if the charger output is measured without connecting any load, perhaps it has to show 13.8V
mvs sarma said:if the design is protected such that the supply would NOT switch ON without connecting battery, it is fine and you may have to connect a fully charged battery --then it will have to show 13.8V, at least after few minutes.. if you connect a normal battery that is partially charged, after some time the charging will be complete, where upon it will have to show 13.8.
mvs sarma said:Don't expect the charger to show 13.8 by connecting a discharged / partially charged battery.
mvs sarma said:yes there is a way to test for full load current. you may connect a battery and start the charger. then add artificial load like high wattage head lamps , or a artificial load resistor -please take precautions for dissipating the heat. (total wattage will be 12*20=240Watts.) then you may remove the battery once charger switches ON. (this method will help switching on for those chargers having protection to startt only with battery in circuit).