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03-31-2008, 04:13 PM
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#1
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Rivet Master
2005 39' Land Yacht 390 XL 396
Common Sense
, Texas
Join Date: Sep 2007
Posts: 5,319
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Hummmmmmmmmm.......
Is there a way to stop the incessant hum of the inverter, besides unpluging the shore power?
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03-31-2008, 04:45 PM
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#2
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Rivet Master
Commercial Member
Vintage Kin Owner
Naples
, Florida
Join Date: Dec 2005
Posts: 7,508
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Steve,
If it the 'Univolt' converter that you are referring to (PM me if you would like an exlaination of the difference between a converter and an inverter),that is what they do best......HMMMMMMMMMMMMM!!!
The best way to get rid of the hum is to REPLACE THE UNIVOLT. Talk to Randy (68 Overlander) at BestConverter - Converters, Inverters, Electrical Supplies, Electronics and he will fix you up with a suitable replacement for that old device (it makes a nice boat anchor I'm told!)
__________________
lewster
Solar Tech Energy Systems, Inc.
Victron Solar Components and Inverters, Zamp Solar Panels, LiFeBlue and Battle Born Lithium Batteries, Lifeline AGM Batteries
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03-31-2008, 05:04 PM
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#3
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Rivet Master
2005 39' Land Yacht 390 XL 396
Common Sense
, Texas
Join Date: Sep 2007
Posts: 5,319
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Yes, sorry slip of the tongue, or keys, it's the converter.
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03-31-2008, 05:16 PM
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#4
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Rivet Master
2014 25' Flying Cloud
Cuddebackville
, New York
Join Date: May 2007
Posts: 4,346
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The converter in my old SOB made an annoying buzzing sound. I had to periodically nudge the toroid inductor (?) (the magnetic doughnut with copper wire wrapped around it) with a pencil to get it to stop. A few bumps down the road and it would start buzzing again. Fortunately i don't have that with the Safari. So if you don't want to deal with it, maybe an newer converter is the answer.
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03-31-2008, 05:41 PM
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#5
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Rivet Master
Airstream Dealer
Corona
, California
Join Date: Feb 2002
Posts: 16,497
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Quote:
Originally Posted by SteveH
Is there a way to stop the incessant hum of the inverter, besides unpluging the shore power?
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Steve.
What is the make and model of your univolt?
A previous owner may have changed it to something other than original.
"IF" you have the original, you can remove the transformer and "repot" it.
Repoting costs the price of a quart of clear enamel paint.
Andy
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03-31-2008, 05:42 PM
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#6
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Rivet Master
2016 23' International
Centennial
, Colorado
Join Date: May 2006
Posts: 1,684
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I agree.....a new converter is in order.
The new ones don't hum like the old Univolt's
Good luck!
__________________
Steve "Centennial Man"
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03-31-2008, 07:07 PM
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#7
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Site Team
1964 26' Overlander
1964 19' Globetrotter
OlyPen
, Washington
Join Date: Aug 2003
Posts: 13,936
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Pitch out the old battery boiler - the new ones will improve your battery life and run dead silent as well.
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03-31-2008, 07:48 PM
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#8
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Retired.
Currently Looking...
.
, At Large
Join Date: Jun 2003
Posts: 21,276
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Why do Univolts hum?
Because they don't know the words!...
Seriously, you can use Inland Andy's fix for the Univolt, a can of paint is certainly less money than a new converter.
If you want to replace the Univolt while you have it in your hands, you can get an Intellipower converter (or almost any other "modern" converter) to replace the Univolt/buzzbox/boat anchor (choose any nickname). I like the Intellipower, but there are other brands to choose from.
__________________
Meddle not in the affairs of dragons, for you are crunchy, and taste good with ketchup.
Terry
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03-31-2008, 07:55 PM
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#9
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Rivet Master
2006 25' Safari FB SE
St. Cloud
, Minnesota
Join Date: Aug 2003
Posts: 13,280
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A new converter will partly pay for itself in fewer batteries used up. Batteries are still a challenge to get a full life out of. Trying to do that with a Univolt only compounds the problem. It's a dinosaur sledgehammer of a solution and what was available 40 years ago.. Janet is right -- leave it plugged in for any significant time and it can boil the batteries dry. Replacing it is simple, fairly inexpensive and an effective fix for more questions than you asked. WFCO or Intellipower uses the mantra, "Ommm..." -- not "HummmmMMMMMMM!"
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03-31-2008, 08:58 PM
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#10
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Rivet Master
1977 Argosy Minuet 6.0 Metre
Colorado Springs
, Colorado
Join Date: Dec 2003
Posts: 739
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Sounds like repotting may still be an option for you. Our old Univolt quit last summer at Sand Dunes Colorado. It responded to percussive repair and worked for the rest of the trip. I replaced it with a 4455TC ParaMode converter with battery tempature checker when we got back. There are several good options for modern converters. The paraMode is dead silent except for when the cooling fan kicks on then you get a little fan noise. I gave the old Univolt to a local Ham operator. He repaired it, added some magic electronics and uses it to power a portable ham shack.
__________________
Royce (K0RKK) 146.460 simplex
Web page https://spearfishcreek.net/
AIR# 3913
'77' Minuet 6 Metre, behind a 2005 stock Jeep Rubicon with Equa-L-Zer hitch.
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04-01-2008, 01:56 AM
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#11
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Rivet Master
Currently Looking...
West of Fort Worth
, Texas
Join Date: Aug 2006
Posts: 6,699
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Quote:
The new ones don't hum like the old Univolt's
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Quote:
Pitch out the old battery boiler - the new ones will improve your battery life and run dead silent as well.
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I don't know what qualifies as new. My 1998 Safari had a noticable hummm.
Dave
__________________
AIR #15800
"Wimpy" 1/2 ton 2002 GMC Sierra 4X4 Z-71 Gasser
2000 Safari SS 25'
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04-01-2008, 04:38 AM
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#12
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Rivet Master
2014 25' Flying Cloud
Cuddebackville
, New York
Join Date: May 2007
Posts: 4,346
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Don't confuse a fairly loud, buzzing hum with the barely audible sound of the cooling fan.
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04-01-2008, 11:51 AM
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#13
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Rivet Master
1995 30' Excella
Bowie
, Maryland
Join Date: Apr 2005
Posts: 2,345
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Quote:
Originally Posted by Royce
It responded to percussive repair and worked for the rest of the trip.
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I'm going to use that one.
__________________
1995 Airstream Classic 30' Excella 1000
2014 Ram 2500 Crew Cab with Cummins 6.7L Diesel
Sold but not forgotten: 1991 Airstream B190
Sold: 2006 F-250 6.0L Powerstroke Supercab
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04-01-2008, 12:12 PM
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#14
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Rivet Master
Currently Looking...
West of Fort Worth
, Texas
Join Date: Aug 2006
Posts: 6,699
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Quote:
Originally Posted by Wayne&Sam
Don't confuse a fairly loud, buzzing hum with the barely audible sound of the cooling fan.
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This would be a hum unlike any fan I've heard. It was quite unlike a "barely audible sound of a cooling fan".
__________________
AIR #15800
"Wimpy" 1/2 ton 2002 GMC Sierra 4X4 Z-71 Gasser
2000 Safari SS 25'
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