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Old 02-26-2003, 12:12 PM   #15
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39 lbs!!

O.K. then,

Newkid is the winner by default!

Your address please? I will ship it C.O.D. for the freight.

Chas
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Old 03-01-2003, 11:09 AM   #16
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Chas,

Thanks, but no thanks!

I bet you could get at least $25.00 for it on ebay! Just rememember it is "rare" and "original" and they don't make them like this anymore! A new one could cost you 200.00 or more at the local RV dealer!

With tongue firmly planted in cheek................
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Old 03-01-2003, 08:47 PM   #17
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i sold one last month for $75.00 . was out of my motor home. replaced it with 9160 with charge wizard.
no thanks i dont want it either.
al
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Old 03-01-2003, 09:42 PM   #18
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Ebay? Excellant idea!!,

I actually do have a box where I keep all the outdated and non-working original parts, who knows, someday they may be worth some bucks!! Actually my Airstream dealer kinda wants it for parts, guess it may still have some life in it.

Got the new 60 amp Intelli-Power installed today. Tell me something, my old univolt weighed 39 lbs and the Intelli-Power weighs about 5 lbs., what gives?? Old school, new school?

Chas
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Old 03-02-2003, 08:16 AM   #19
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34 LB weight reduction! cool, now you can carry cases of Adult beverages and never worry if you are in a dry county or not!
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Old 07-04-2003, 06:43 AM   #20
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UniVolt

Ok, tell me what I am missing here. I see many posts talking about Univolt systems overcharging batteries, so I went to my trusty owners manual for my '78 Excella 500 and read...

"When your Airstream is hooked up to 120 volt A.C. the Univolt System automatically charges the trailer battery and, if it is hooked up, your automobile battery as well. The speed and degree of charge depends on how much power is used for lights and appliances, as only the surplus goes to charging the battery.

... Whenever possible, use the automatic built-in charger of the Univolt System for charging. The charging circuit automatically controls the current, reducing it as the battery increases in charge."

From the sound of this, the Univolt System handles it all. Mine makes a slight buzzing noise, which I understand is normal. Did older Univolt Systems not have a charging circuit that limited the charge?

Vic
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Old 07-15-2003, 12:19 PM   #21
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Power Supply Hum (Buzz)

The reason for the HUM is that the AC electricity running through the windings in the transformer causes the lamination plates to vibrate at 60 cycles and thus it hums.
Because of the magnetic field

The answer is to move the transformer. SORRY

Other than taking the transformer out and binding the plates and dipping in a varnich (and that may not help) I can only sugest that two sticks of dynamite or the same can cure it. Or don't plug into external AC

Rae Baker
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Old 07-15-2003, 01:29 PM   #22
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Hummm at 50 hz

My magnetec make too a noise like you but in 50hz and I think the noise is the same;
To attenuate it, I've put a polystyren plate under the univolt because it was fixed on a wood plate on the furnace tunnel and , in this way , you really heard the sound vibrations from there, in the bathroom.
With the ploystiren plate, the humm is very light, nearly inaudible.

If that can help you...

the prior owner has equiped a switch too, to stop the hummm during the night surely.


Bruno.
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Old 07-15-2003, 06:42 PM   #23
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I never even heard my univolt at all while I was plugged in at KOA. It's under the right twin bed which my youngest son sleeps on. He never said anything about a hum keeping him awake. Now that makes me curious as to wether it's even working! I will check soon...I really appreciate all the brainstorming here, although it may get expensive
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Old 07-16-2003, 07:23 AM   #24
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Power Supplies for Air Streams

Not all but many are merely an AC transformer that have voltage doubling and a diode arrangement to supply 12 volts to the trailer and charge the batteries.

A 55 Amp unit is capable of delivering up to 55 Amps but does not push 55 Amps through your battery.

It is like having a gallon bucket and taking out only a once at a time or what you need. one ounce , two , or more, but capable of 55 amps if needed.

Your battery has an internal resistance, and this is low when the battery is used up and the current from the charger will supply enough voltage and current to charge the battery. As the battery is charged the internal voltage will rise in the battery and the resistance increases, and limits the charging current. Once fully charged the voltage in the battery is the same as the charger and little if no more current is delivered to the battery.. An automatic limiting system.
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