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Old 02-14-2015, 04:47 PM   #1
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1976 31' Sovereign
Chester , Vermont
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'74 Sovereign Univolt

Plugged into shore power. The univolt hums. No battery connected (small compartment, btw. Is that normal ?). When all DC lights are on, power cuts, so we only keep a couple lit at a time. I want to replace univolt. Suggestions? Will I be able to turn all overheads on at the same time?
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Old 02-14-2015, 04:51 PM   #2
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You know why it hums? It forgot the words! Badabum tishhh! Thank you, I'll be here all week. Try the veal.

Sorry, I've got nothing on the univolt. Somebody on here will be able to help. Good luck with it!

-Red, almost regretting the joke now..
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Old 02-14-2015, 04:52 PM   #3
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I replaced the Univolt in our 1976 with a Progressive Dynamics with charge wizzard, 30 amp. Used the panel from the Univolt, and put in the same place as original. Worked great, no hummmm, and no more battery problem. One of the best things I did for the old girl!!! Chris
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Old 02-14-2015, 04:53 PM   #4
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One thing though, a new charger/power supply had just been put in my '74 when I bought it, and I can turn on EVERYTHING 12 volt in the trailer with no battery connected, so, yes, with a new one, all the lights are no problem.

-Red, trying to be helpful after all..
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Old 02-15-2015, 11:43 PM   #5
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They are not difficult to replace. From that era, you may or may not also need a DC fuse board to go with it. If your DC fuse board is on the wall, you don't need the FB9 fuse board. If its integrated into the end of the Univolt, you do. This is usually a do-it-yourself project and not expensive or difficult.
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Old 02-16-2015, 12:07 AM   #6
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1969 25' Tradewind
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I replaced the Univolt in our '69 Tradwind with a PD 60 amp with charge wizard

My Univolt did not have a fuse board.

It had a separate fuse block in the rear compartment with glass type circuit breakers and fuses.

I relocated it to the curb side compartment after rebuilding and updated it with MaxiFuses and circuit breakers and even the light.
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Old 02-16-2015, 07:53 AM   #7
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1978 31' Sovereign
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If your univolt still works its a small miracle. They are noisy because of the way the diodes and capacitors work. If you are handy, the Univolt can be repaired. The dodes and capacitors are available at Galco. But.... a new box is cheaper than replacement parts.
Everyone here has their preferences. They all will work. A replacement can be found at Amazon. Find what you like based on your needs and read the reviews. Good Luck
Clayton
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