Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Alpine Coach Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 05-03-2014, 11:10 AM   #1
Senior Member
 
Alpine Owners Club
Join Date: Apr 2007
Location: Edmonds, WA
Posts: 587
High pitch buzzing light fixture

There is an extremely high-pitch buzzing sound when I turn on the ceiling light/vanity lights on in the toilet area and it is very irritating. The dimmer switch changes the sound slightly, but does not eliminate the buzz. The pitch is so high that my husband (Todd) cannot hear it at all -- thanks to his years working around airplanes at Boeing Field in Seattle.

Does anyone else have a ceiling light/vanity light that buzzes? And if yes, were you successful in eliminating that sound? Tell me how...pleeze.

Janet Legg
__________________

__________________
Janet and Todd Legg
2006 Alpine Apex M-40FDQS #75594
2014 Honda CRV w/navi
Janet and Todd is online now   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 05-03-2014, 07:45 PM   #2
Senior Member
 
wa8yxm's Avatar
 
Damon Owners Club
Workhorse Chassis Owner
Join Date: Mar 2009
Posts: 22,787
What type of lighting and yes, it is very common. Depending on the light type.

RV: FLorcesents use an inverter, This is usually a high frequncy (like 400 HZ, just below middle C a few notes) but can be an octave or two higher. (Chromatic scale). (Can you guess my Mother was, and daughter is, a classical musician and I sing in the choir).

LED dimmable and other 12 volt dimmable may use PWM dimmers, and they can also work in a wide range of frequencies.

HOUSE lights normally hum around 120 HZ (About 2 octaves below Middle C) (A below Middle C (middle A?) is 44o HZ by the way an octave is either 2x or 1/2 X that, so that's what I'm basing my notes on, ME Science/Math major and electronics tech,, Got to knwo all this stuff just like musicians do).
__________________

__________________
Home is where I park it!
wa8yxm is offline   Reply With Quote
Old 05-03-2014, 10:52 PM   #3
Senior Member
 
bcbowers's Avatar
 
Alpine Owners Club
Join Date: Mar 2009
Location: Surprise, AZ
Posts: 631
Janet,

One remedy is to change out the ballast and light bulbs for the large fluorescent fixture in the kitchen with T8 versions. Ours was over heating and humming badly until we went with the T8 setup. We also opted for the highest Kelvin value bulb which provides a more white light as opposed to the slightly yellow versions.

We don't get humming from the 18" fluorescents but have changed those bulbs to a higher Kelvin value for whiter lighting.
__________________
Bob Bowers (Surprise, AZ)
2003 Alpine Coach 40' FDTS
2014 Jeep Cherokee Lattitude
bcbowers is offline   Reply With Quote
Old 05-04-2014, 06:53 AM   #4
Senior Member
 
94-Newmar's Avatar
 
Join Date: Nov 2009
Posts: 2,043
Janet, what type of lighting does the dimmer control? Incandescent? LED? IF incandescent changing to a lower wattage bulb will help prevent the filaments from "singing". I've also found changing to bulbs rated for 130volts rather than 115/120volts stops the ringing as the heavier filaments are less likely to sing.

First I would try removing one bulb at a time to see if it's just one bulb or all of them.
__________________
94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified
94-Newmar is offline   Reply With Quote
Old 05-04-2014, 11:17 AM   #5
Senior Member
 
Jim A's Avatar
 
Join Date: Jun 2005
Posts: 1,375
Janet, which lights in the bathroom and vanity area on on dimmers? None of my lights in those areas have a dimmer. The only dimmers in my coach are for the halogens under the cabinets, and the 120v dimmer for the lights on the headboard.

Like Bob I replaced my kitchen 120v fluorescent with a T8 electronic ballast. Mine wasn't humming. I just liked the better light.

I have also replaced the 18" 12v fluorescent with LED strips, as well as replaced the undercabinet lights with LED's for better light. I also replaced the incandescent lights in the vanity with LED strips. Again for better light and lower battery draw when dry camping, not due to humming.

And in case any of you read the recent thread about LED's killing OTA TV signals, no problem with my LED's at all. OTA works fine.
__________________
Jim A
'04 Alpine Coach 36' MDDS
Jim A is offline   Reply With Quote
Old 05-04-2014, 12:28 PM   #6
Senior Member
 
Alpine Owners Club
Join Date: Apr 2007
Location: Edmonds, WA
Posts: 587
I apologize for not clarifying that the buzzing light fixture is NOT a fluorescent and there is one switch that turns on both the ceiling light & and over-the-sink light fixture. The one recessed ceiling light is a 12 volt Halogen lamp and the three lamps in the fixture above the sink are 12 volt taillight bulbs (scare light bulbs?). Todd just changed out the three taillight bulbs with three heavier filament lamps...and now the buzzing seems to have stopped. Ahhh! Relief at last!

Thanks everyone for some very good suggestions/advice.
__________________
Janet and Todd Legg
2006 Alpine Apex M-40FDQS #75594
2014 Honda CRV w/navi
Janet and Todd is online now   Reply With Quote
Old 05-04-2014, 04:40 PM   #7
Senior Member
 
94-Newmar's Avatar
 
Join Date: Nov 2009
Posts: 2,043
Glad the heavier filaments fixed it.. this seems to be somewhat common with whatever type of dimmers the manufacturers are using, probably el-cheapos :-)
__________________
94-Newmar Kountry Star 40-KSDP
Spartan/Cummins 8.3C-300HP/Allison 3060 WTEC-II/25yr RV Tech RVIA Certified/Onan-Cummins Certified
94-Newmar is offline   Reply With Quote
Old 05-06-2014, 02:28 PM   #8
Senior Member
 
Jim A's Avatar
 
Join Date: Jun 2005
Posts: 1,375
Janet, FYI the bathroom vanity fixture probably came with three (3) 1141 bulbs in it. These are typically 18 watt bulbs. I assume Todd used 1156 bulbs to replace them. These are 27 watt bulbs. So they are brighter and hotter, and with a somewhat shorter life. The scare lights came with 1295 bulbs, which are 37 watts. Even hotter and much shorter life. All use the same BA15 bayonet base.

Heat, light output, and amp draw is why we often switch to LED's. But good LED's are not cheap. With the design of the vanity fixture and the bayonet base, some LED replacement bulbs won't physically fit in the fixture.

I must live a charmed life. I don't know that I have experienced humming incandescent bulbs.
__________________
Jim A
'04 Alpine Coach 36' MDDS
Jim A is offline   Reply With Quote
Old 05-07-2014, 10:36 AM   #9
Senior Member
 
Alpine Owners Club
Join Date: Apr 2007
Location: Edmonds, WA
Posts: 587
No buzzing now.

So I was in the restroom...resting...and the lights went out. A few seconds later the Hydro Hot shut down. I thought it was a voltage spike so I had Janet go to the Silverleaf and check. Both legs were within normal limits and steady. I visually checked the fuses in the hall and in the wet bay. All fuses were good. Is there an additional fuse block that the fuse for the restroom is located?
__________________
Janet and Todd Legg
2006 Alpine Apex M-40FDQS #75594
2014 Honda CRV w/navi
Janet and Todd is online now   Reply With Quote
Old 07-22-2014, 08:45 AM   #10
Senior Member
 
Alpine Owners Club
Join Date: Apr 2007
Location: Edmonds, WA
Posts: 587
Light issue resolved

Bobby Vodden found that the issue was an aftermarket dimmer switch had been installed below the sink. The circuit board in said dimmer was overloaded and finally burned out causing the no power situation at the on/off switch. Bobby disconnected the dimmer and all is well.
__________________

__________________
Janet and Todd Legg
2006 Alpine Apex M-40FDQS #75594
2014 Honda CRV w/navi
Janet and Todd is online now   Reply With Quote
Reply



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
How hard can it be to change a light bulb? coulter6 National RV Owner's Forum 12 01-20-2017 04:07 PM
C-9 Check Engine Light lhill Caterpillar Engine Forum 12 08-24-2014 11:32 AM
Light Fixture LarPar2012 Class A Motorhome Discussions 11 02-18-2014 10:29 AM
Dometic Refrigerator won't light on gas rewtrans RV Systems & Appliances 7 11-22-2013 11:48 PM
Change Microwave range light to LED! hdossett RV Systems & Appliances 5 07-15-2013 08:38 AM

» Virginia Campgrounds

Reviews provided by


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 09:07 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.