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09-28-2018, 09:20 PM
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#1
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Rivet Master
2006 25' Safari FB SE
1972 23' Safari
Houston
, Texas
Join Date: Feb 2009
Posts: 1,356
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72 Safari Univolt went out
So just bought this trailer and brought back to Texas. When I plugged the trailer in the Univolt and 12 V system was working but making a loud hum. Decided to leave the trailer plugged in last night so when I came home after work today the hum was gone along with all 12Volt lighting.
the 120 Volt system was fine. So any thoughts on this? Fuses? The Univolt is located in the back bath closet and like anything else in this old trailer is subject to replacement. Thanks for some tips.
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09-29-2018, 05:58 AM
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#2
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Rivet Master
1968 24' Tradewind
Oxford,
, Mississippi
Join Date: May 2009
Posts: 1,564
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The old univolts make fine boat anchors.
Seriously, it could be a fuse, it could have cooked your battery or it could be dead. In my opinion, don't mess with it. Call Randy at Bestconverters.com and order a new converter. Tell him what your trailer is and he will recommend the one that fits your needs. The technology of the new charger/converers will keep from overcharging and maintain the battery without damage. They are also much quieter than the old univolts.
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Bruce & Rachel
__________________
68 Trade Wind
2001 Toyota Tundra
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09-29-2018, 08:08 AM
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#3
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Retired.
Currently Looking...
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, At Large
Join Date: Jun 2003
Posts: 21,276
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45+ years is a good run. Almost anything made in the last 15 years would be a vast improvement, though a decent three stage converter would probably be the most cost-effective replacement. And it will be about 30 pounds lighter...
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Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
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09-29-2018, 08:46 AM
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#4
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4 Rivet Member
1972 29' Ambassador
grants pass
, Oregon
Join Date: Jun 2011
Posts: 262
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converter
I would also recommend Randy at bestconverters.com .
Tell him what you have and he will set you up.
__________________
1987 Avion 34X
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09-29-2018, 09:29 AM
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#5
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Rivet Master
1988 25' Excella
1987 32' Excella
Knoxville
, Tennessee
Join Date: Oct 2010
Posts: 5,118
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You really wanted to change it whether the old one is working or not.
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09-29-2018, 09:38 AM
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#6
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3 Rivet Member
Currently Looking...
belen
, New Mexico
Join Date: Jan 2012
Posts: 191
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The hum alone will drive you nuts.
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09-29-2018, 09:56 AM
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#7
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Rivet Master
2006 25' Safari FB SE
1972 23' Safari
Houston
, Texas
Join Date: Feb 2009
Posts: 1,356
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Univolt
yes and after I get the black water tank out I'll lie on my back and see if I can get to the thing, Along bottom floor in the bathroom near the corner.
Now I know why the PO didn't replace it.
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09-29-2018, 10:19 AM
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#8
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Half a Rivet Short
2017 30' Classic
2022 Interstate 24X
Carlisle
, Pennsylvania
Join Date: May 2017
Posts: 15,741
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Hi
The output capacitors in the beast have almost certainly gone dead. The resonator capacitor is likely gone as well. Yes, you could go crazy rebuilding the beast. Why would you? The modern units are a lot better at what they do.
Also on the list to dig into:
1) Battery(s) likely need replacing - do that after the converter is swapped out but before you go anywhere ( no working battery = no breakaway function ... yikes ...)
2) Brakes should be checked on any "new to you" trailer or MH
3) Hubs need to be checked / lubed.
4) Tires over about 6 or 7 years old should be replaced
5) Water system should be flushed / cleaned / bleached.
6) AC should be checked. The motor start capacitor is in the same kind of "past use by date" category as the converter electronics.
I'd start saving up to convert the lights to LED's but that's not in the same category as any of the stuff above.
Bob
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09-29-2018, 11:42 AM
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#9
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Rivet Master
1977 Argosy Minuet 6.0 Metre
1973 21' Globetrotter
1975 26' Argosy 26
Vista
, California
Join Date: Sep 2006
Posts: 589
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This is actually a good thing. The old univolts are, not worth fixing. You will enjoy having a charger that you don’t need to monitor. Less to worry about more relaxation. My 71 GT has an automotive portable battery charger hard wired in. That was first thing to go. Enjoy your new one!
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09-29-2018, 11:55 AM
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#10
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1 Rivet Member
1970 25' Tradewind
Chicago
Join Date: Aug 2004
Posts: 19
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I gutted my univolt to keep existing fuses and connected new converter to hot and neutral on fuse board. Used heavy gauge wire so I could move new converter to a more accessible location.
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09-29-2018, 02:56 PM
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#11
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Retired.
Currently Looking...
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, At Large
Join Date: Jun 2003
Posts: 21,276
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And now, for the only Univolt joke I know:
Q: Why do Univolts hum?
A: Because they don't know the words.
Thank you, I'll be here all weekend.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
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09-29-2018, 03:04 PM
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#12
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Half a Rivet Short
2017 30' Classic
2022 Interstate 24X
Carlisle
, Pennsylvania
Join Date: May 2017
Posts: 15,741
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Quote:
Originally Posted by overlander63
And now, for the only Univolt joke I know:
Q: Why do Univolts hum?
A: Because they don't know the words.
Thank you, I'll be here all weekend.
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Hi
Ok, so since you asked ....
Univolt's hum because of the type of voltage regulating transformer they use. The core's magnetic field is a bit overwhelming and there's really no way to keep it from vibrating everything around it.
Bob
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09-29-2018, 07:31 PM
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#13
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Rivet Master
2006 25' Safari FB SE
1972 23' Safari
Houston
, Texas
Join Date: Feb 2009
Posts: 1,356
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Quote:
Originally Posted by uncle_bob
Hi
Ok, so since you asked ....
Univolt's hum because of the type of voltage regulating transformer they use. The core's magnetic field is a bit overwhelming and there's really no way to keep it from vibrating everything around it.
Bob
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Thanks Bob and now I know...
I was going to bring in my Vintage Turntable with my vintage Technics amp that I’m sure will love that 70 s to Univolt power supply while
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09-29-2018, 07:32 PM
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#14
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Rivet Master
2006 25' Safari FB SE
1972 23' Safari
Houston
, Texas
Join Date: Feb 2009
Posts: 1,356
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Quote:
Originally Posted by RichHog
Thanks Bob and now I know...
I was going to bring in my Vintage Turntable with my vintage Technics amp that I’m sure will love that 70 s to Univolt power supply while
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Listening to Jefferson Airplane.
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09-30-2018, 08:09 AM
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#15
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3 Rivet Member
Newcastle
, Oklahoma
Join Date: Feb 2017
Posts: 120
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I Second 68 TWinds advice. I couldn't say it any better. The new Boondockers are 4 stage and much better for todays electrical needs. I have an old Univolt that came out of my 79 Trade Wind if you want it but you're better off going to Best Converters.
Good Luck
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10-16-2018, 09:04 PM
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#16
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Rivet Master
2006 25' Safari FB SE
1972 23' Safari
Houston
, Texas
Join Date: Feb 2009
Posts: 1,356
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Looking at the 45 watt Boondocker and the fuse panel with breakers. Oddly the Univolt came back to life hum and all. Now I need to find a battery that will fit in the side panel.
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10-17-2018, 07:37 AM
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#17
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3 Rivet Member
Newcastle
, Oklahoma
Join Date: Feb 2017
Posts: 120
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I wouldn't call it life, it is more like a mummy. The best place for the old Univolt converters is at the end of a rope and used for a boat anchor. Go with the Boondocker and save yourself a lot of headaches!
Good Luck
MC
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