Mirage mx keeps blowing fuse

Discussion in 'CB Radio Forum' started by JForce28, Nov 8, 2025.

  1. Night Stalker10

    Night Stalker10 Road Train Member

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    Jun 26, 2017
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    Are you sure? You can't argue with ohms law.
    Okay, let's say you have a 120v circuit and a 100 watt light bulb. Using ohms law I = P ÷ V.
    So 100/120 = 833ma. Let's use this same circuit using 240v. So 100/240 = 417ma. So if you use wattage in the circuit, then the answers A. 120v because the current is increasing with lower voltage.
    Now if you replace the 100 watt bulb with a 100 ohm resistor, then we use I = V ÷ R.
    So 120/100 = 1.2 amps. Also 240/100 = 2.4 amps. Now the current is acting in the opposite manner than the first scenario, so the answer should be B. 240v, since technically there really isn't 440 volts, because 3 phase is actually 380 volts.
     
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  3. Night Stalker10

    Night Stalker10 Road Train Member

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    Apologies to the OP for getting side tracked. You should be fine with a 5 or 7.5 amp fuse as was recommended by others, since your not running a high power radio. Unless you had tech do a mod to increase the power output, then you may need to increase the fuse rating.
     
  4. cajunCDLdriver

    cajunCDLdriver Bobtail Member

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    May 24, 2026
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    Yes I am sure. I will ask again:

    What voltage is most dangerous?

    A. 120v
    B. 220v
    C. 480v

    Bonus: Why?

    This was a question on an exam in trade school. There is one answer and one answer only, and one reason why. Has nothing to do with resistors, watts or amps. The question is simple.
     
  5. 062

    062 Road Train Member

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    If you have a empty light socket on a 120v 15 amp breaker and you stick your finger in it,do you think it will only deliver 833ma?
     
  6. Night Stalker10

    Night Stalker10 Road Train Member

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    Nope, that was just a simple circuit in my examples to show what current does vs voltages.
     
  7. Ridgeline

    Ridgeline Road Train Member

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    oh god ...

    you need to have a shock through your body of only 30 milliamps at 120 to kill you.
     
  8. Night Stalker10

    Night Stalker10 Road Train Member

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    Well this has been fun. The answer is
    D: None of the above.

    Why? Because people smarter than me claim voltage alone won't hurt you. So I will leave it up to you and 062 to figure it out.
     
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