75 Sovereign -How to turn off converter

[Geordie]

I have a 1975 Sovereign, which will remain stationary.
Appears to be original electrical. How do I switch off the converter?
The humming drives me nuts. Attached pic is from whence humming emanates.

Thanks!

[dbj216]

The converter is powered by 120v AC and "converts" it to 12v DC to charge the trailer battery and to power the 12v circuits in the trailer. Without the converter and/or the battery, your 12v circuits won't work. Thus lights, fans, furnace, water heater, water pump, etc. won't operate.

If you are a "park model" where everything above runs on 120v AC, then all you have to do is unplug the converter from its wall outlet. So look for the power cord coming out of the converter and unplug it. Then your battery will be dead in a month or so.

My battery and converter were in the rear in a drop down storage compartment and maybe your 75 is the same way. Your converter may be behind the fuse panel.

David

[Geordie]

Thanks! Unfortunately I will likely have to pull out the stove to reach it. - assuming it is a "park model" with a plug. Was hoping there would be a fuse or switch somewhere that I could reach. The only things I run on DC, and only at night, is 6 lights. Have 4 good marine batteries and a battery charger hanging about. Sigh.

[azflycaster]

Do yourself and your batteries a favor, replace the converter with a quiet multi stage model.

[Trnpk Crsr]

The hum is from the transformer on the AC side of the converter. Removing a fuse on the DC side will not stop the hum.
The converter is simply plugged into a wall outlet near the converter. Unplug it, and the hum will go away.

Cheers,

John

[strangepod]

Take that thing and chuck it! Go out and get yourself a 30-45amp new converter. Progressive dynamics makes a good one, I have a 45amp in our 76 Argosy and I NEVER hear it running. There are also a couple of other manufactures that make a good unit. For example:

https://www.amazon.com/Progressive-D...4-dc28e6d374b3


https://www.amazon.com/Powermax-Supp...2-63e904010ad0

John

[Geordie]

Yeah, I want to chuck it. Or at least disable it. The only things that are running on 12-volt DC are 12 lightbulbs. No pumps, fans, radios, etc. If I replace the existing bulbs with LED bulbs pulling 300ma each, I figure I am only using about 3.6 amps. I have a quiet 15 amp low-noise 12-volt power supply used, e.g., by retailers demonstrating 12-volt audio equipment. https://www.powerstream.com/charger-...high-power.htm

Wondering if I can disconnect the converter (without pulling out the stove and removing the converter) and attach the new quiet power supply to the fuse box. The AC line appears to be hard-wired to the converter. (pic attached) If there are any good video links showing the process I would be very appreciative. I am a newbie and it's hard to get RV techs to make house calls in rural West Texas!

I am guessing that the red and blue wires at the top of the fusebox are the DC-in positive and negative, respectively.

[Geordie]

Silence is golden! The hum, and the even louder hum in the stereo, is gone.
Did not touch the fuse box. Disconnected the converter, added a battery and small solar panel and all is well. If I need an extra charge once a month or so it is so worth it. Thanks forum!