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Old 05-03-2018, 06:18 PM   #1
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Surge protector

Does the progressive ems hum continually while connected to ac power? Mine does and want to make sure this is normal. Tia.
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Old 05-03-2018, 06:33 PM   #2
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I've never noticed ours humming, but I do notice the converter humming. However, the EMS is down and behind our converter.
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Old 05-03-2018, 07:00 PM   #3
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Does the progressive ems hum continually while connected to ac power? Mine does and want to make sure this is normal. Tia.
I do not hear the EMS but I do hear the battery charger portion of the converter if i am near it. If you want to check which one is making the noise you can use a screwdriver. Hold the metal blade to the top of the EMS and place your ear against the handle. If it's the EMS you should hear it . The converter is a bit harder to access but odds are if the EMS is quiet you are hearing the battery charger.
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Old 05-03-2018, 07:01 PM   #4
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Mine did till I replaced the contactor.
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Old 05-03-2018, 08:53 PM   #5
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If you want to check which one is making the noise you can use a screwdriver. Hold the metal blade to the top of the EMS and place your ear against the handle.
Oh boy, are you old Skool. I remember doing that on car motors to figure out which cylinder wasn't firing!
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Old 05-03-2018, 10:44 PM   #6
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Oh boy, are you old Skool. I remember doing that on car motors to figure out which cylinder wasn't firing!
That method was called using a "mechanics stethoscope"
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Old 05-04-2018, 12:05 AM   #7
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That method was called using a "mechanics stethoscope"
Yep and I have one of these at home, a real mechanics stethoscope. Even used it recently find the source of the ticking noise in the truck. Turned out to be a belt tensioner.
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Old 05-04-2018, 02:21 AM   #8
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Yep and I have one of these at home, a real mechanics stethoscope. Even used it recently find the source of the ticking noise in the truck. Turned out to be a belt tensioner.
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Old 05-04-2018, 05:08 AM   #9
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I just take out my hearing aid and use it instead, works well......
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Old 05-04-2018, 05:08 AM   #10
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Just kidding, I have no hearing aids, yet!!
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