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Old 09-30-2006, 09:11 PM   #1
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1975 31' Sovereign
Gainesville , Florida
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Univolt System for charging

I have a 1975 Sovereign (31 ft.). Inside I have a complete working recording studio for remote jobs on the road and, and for mixing at home. The Univolt System for charging-stock Airstream- is making a noisey hum. When I'm working, I use only city electrical service,(120 V). How can I disable the charging system? I've tried and failed. Please help,
Justin. email:me4trzn@yahoo.com
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Old 09-30-2006, 09:18 PM   #2
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The PO of my 75 showed me a trick he used to kill the converter so he could sleep at night. At the circut breaker pannel I have 4 CB's. One main in and 3 for 100 AC circuts. Tripping the right CB (one of te three) will remove power to the univolt. One note, on my Trade Wind killing that CB will also remove power from the outside patio outlet.
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Old 09-30-2006, 09:54 PM   #3
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1975 31' Sovereign
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By flipping either of the 2 circut breakers-not Main and not AC- I found that one controls the Forward Cabin, and one controls the Aft (rear). I need them both. rozwd
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Old 09-30-2006, 10:01 PM   #4
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1975 31' Sovereign
Grovetown , Georgia
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Hi rozwd.
Unplug it. On my '75 it plug in under the sink. Hard to get to though. On my '82 there is a light switch that had been installed. If you Univolt is not under the sink find the hum and an outlet should be near by. Unplug.
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Old 09-30-2006, 10:13 PM   #5
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1975 31' Sovereign
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Hey GO Bob, "We're goin' in." It is under the sink but I only got as far as the DC fuse panel down there.
rozwd
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Old 10-01-2006, 05:09 AM   #6
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1986 34' Excella
Austin , Texas
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Converter Hum

Does the newer type replacement converter that I often read about here on the forum have the hum? It's a pain late at night!

Waynon
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Old 10-01-2006, 06:47 AM   #7
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1972 29' Ambassador
1968 22' Safari
Tyler , Texas
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Hum-free converters

I put in an Intelipower 60 with Charge Wizard this year. The installation was easy, the performance is outstanding, and the hum is GONE. Deposit the Univolt in the dumpster.
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Old 10-02-2006, 08:07 PM   #8
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I said hard to get to. The fuse area would be to easy.

Go up to the shelf, go all the way to the wall. It is a 90 degree plug so it is not sticking out. Tie a rope to it first. This will save diging blindly behind the shelf. I did find a small pan the PO had lost. There is not much room to pull and I see why the light switch was installed of my 82.
Good luck.
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Old 10-02-2006, 08:33 PM   #9
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The PO of our 71 had a surface mounted switch installed in the bunk over the Univolt - so it sticks out on the wall and actually replaces the bracket at that end that supported the drape railing. All it does is shut off the outlet that the Univolt is plugged into - everything else is still powered.
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Old 10-02-2006, 08:50 PM   #10
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Wall switch for Univolt

IIRC that switch was installed and retrofitted to some trailers to turn off the Univolt so as to quiet the trailer for sleeping. By turning it off you don't convert A/C to D/C power and you also don't charge the battey. You must turn the switch back on to run D/C powered items and to charge the battery from shore power. Ed
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