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04-29-2009, 11:59 AM
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#1
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Senior Member
Damon Owners Club Freightliner Owners Club
Join Date: Mar 2006
Location: North East Texas
Posts: 4,946
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Riddle me this electronic experts
Last night whilst wife was vacuuming with the built in dirt devil, all was good
then as she approached the cockpit we started getting feedback like you have never heard.. like a microphone was open and you were the opening band for def leppard
we are talking dog howling and ear piercing feedback, it wasn't coming from the speakers as far as i could tell
unplugged the attachment and it still was there. got painful the closer she got to the steps
any ideas on wise persons of electronics/sound knowledge
__________________
USN Retired, Life time member of the DAV.
Enjoying the 2008 Damon Tuscany 4056, #3998 no your eyes are fine, there are really 6 slides
2022 F150 King Ranch or 2012 Edge toads
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04-29-2009, 01:39 PM
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#2
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Moderator Emeritus
Ford Super Duty Owner
Join Date: Aug 2000
Location: Bryan, TX when not traveling.
Posts: 22,948
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Feedback on what? Was it through the cockpit radio or was it through the surround sound speakers? Was the radio on or off? Have you used this vacuum in this area previously?
Tell us a bit about the equipment? If you were getting a feedback like sound, it had to be from the speakers. Are you sure it was not a resonance set up by the vacuum in the hose/piping or the vacuum housing?
__________________
Amateur Radio Operator (KE5DFR)|No Longer Full-Time! - 2023 Cougar 22MLS toted by 2022 F150, 3.5L EcoBoost Tow Max FX4 Lariat Travel with one Standard Schnauzer and one small Timneh African Gray Parrot, retired mechanical engineer
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04-29-2009, 01:59 PM
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#3
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Senior Member
Join Date: Sep 2006
Posts: 1,339
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Yep - that Devil of a Dirt Devil will whistle like no tomorrow when you extend the hose to near it's range. Simple as that. No harm, except to your ears, it's just the air in the corrugated hose setting up that whistle. Nothing going on with the motor or anything else, just the air in the hose doing it. It's tough vacuuming the entry steps as that hose extension is right at the whistle sweet (or should I say sour) spot... The only answer is to not vacuum those places requiring extending the hose or wear ear plugs...
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2007 and 7/8ths Newmar Essex 4502
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04-29-2009, 02:51 PM
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#4
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Senior Member
Thor Owners Club
Join Date: Nov 2008
Location: Ft. Dodge IA, Kerrville TX
Posts: 246
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Maybe a crack in the hose that opens enough to let air in when extended?,
or where hose connects into the wall that gives a bit when hose is extended, letting air squeak out?
Dunno ....Just guessing
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Dick & Pat Swanstrom
Fort Dodge Iowa
2014 Thor Challenger 37GT
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04-29-2009, 02:55 PM
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#5
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Senior Member
Damon Owners Club Freightliner Owners Club
Join Date: Mar 2006
Location: North East Texas
Posts: 4,946
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I never thought about it, we had a dirt devil in the fiver and often stretched that puppy out, HOWEVER, it wasn't near as suctiony (new word) as this one, they must have made some internal suckasaurus upgrades,
plus i found this afternoon, if the hose is stretched in a long straight line then a sharp curve it starts the shrill. maybe the key is t have a person stand midships and give it a corner bend to slow down or disrupt the air turbulence
i have had the dash apart all morning chasing the microphone feed for the rear camera so i can install a switch to shut it off, until i need to hear the dw telling me where to go
this new learning curve is fun
__________________
USN Retired, Life time member of the DAV.
Enjoying the 2008 Damon Tuscany 4056, #3998 no your eyes are fine, there are really 6 slides
2022 F150 King Ranch or 2012 Edge toads
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05-04-2009, 06:35 PM
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#6
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Senior Member
Damon Owners Club
Join Date: Aug 2006
Location: Asheville, NC
Posts: 223
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Man we hate that whistle! Definately related to the hose and bending it stops the whistle. Only way to stop it from happening.
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Sean & Eddie
2007 Damon Tuscany 4055
Koa the puppy
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05-07-2009, 04:36 PM
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#7
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Senior Member
Ford Super Duty Owner
Join Date: May 2009
Location: kingston tn.
Posts: 974
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go to a vac shop they can sell you a muffler for your vac
brianj/tncruiser
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just liven life in east tn or where ever our
2011 georgetown ,2016 explorer and 2015 "hemi" ram take us
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05-07-2009, 04:58 PM
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#8
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Senior Member
Join Date: Sep 2006
Posts: 1,339
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Quote:
Originally Posted by tncruiser
go to a vac shop they can sell you a muffler for your vac
brianj/tncruiser
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I suspect you are talking of a central vac exhaust muffler - this won't help at all in this case as the whistle is generated inside the suction hose due to the corrugations in the hose hitting some resonant frequency when you stretch the hose just right. The exhaust is in the basement and does not contribute to the whistle.
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2007 and 7/8ths Newmar Essex 4502
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05-07-2009, 05:55 PM
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#9
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Senior Member
Winnebago Owners Club
Join Date: Jun 2004
Location: SW Florida
Posts: 1,025
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powerboatr - are you sure there's no volume control on the rear camera monitor? When I accidentally left mine turned up, the roar from the diesel exhaust was quite loud. Can't imagine having to listen to that all day...
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Tom
'04 Journey 36G - Cat C7
'04 Honda CR-V
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05-07-2009, 06:47 PM
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#10
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Senior Member
Monaco Owners Club Workhorse Chassis Owner
Join Date: Sep 2005
Location: middleburg,fl
Posts: 572
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Pulling the last foot or so forward to the inlet will reduce the howl to an acceptable volume. I have actually considered calling Dirt Devil to see if they had a little longer hose.
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Dale & Betty
04 Lapalma 33'
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05-07-2009, 08:02 PM
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#11
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Senior Member
Damon Owners Club Freightliner Owners Club
Join Date: Mar 2006
Location: North East Texas
Posts: 4,946
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Quote:
Originally Posted by adj
Pulling the last foot or so forward to the inlet will reduce the howl to an acceptable volume. I have actually considered calling Dirt Devil to see if they had a little longer hose.
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in our fiver the vac was about dead center in the coach and the hose never got streeeetched.
i think until we find a resolution the front entry steps will get sweeped out vice vacuumed.
__________________
USN Retired, Life time member of the DAV.
Enjoying the 2008 Damon Tuscany 4056, #3998 no your eyes are fine, there are really 6 slides
2022 F150 King Ranch or 2012 Edge toads
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05-11-2009, 09:13 PM
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#12
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Senior Member
Join Date: Feb 2009
Location: Hamilton, Indiana
Posts: 578
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One other thought, make sure there is a bag in the unit. I didn't check mine, just assumed it would be installed, and had a huge mess to clean up in the bay after I used the vac. I know, never assume anything!
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USMC VETERAN
2017 Thor Windsport 29M
Dave & Myra FMCA 101070S
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05-11-2009, 09:30 PM
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#13
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Senior Member
Damon Owners Club Freightliner Owners Club
Join Date: Mar 2006
Location: North East Texas
Posts: 4,946
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Quote:
Originally Posted by soonerdave
One other thought, make sure there is a bag in the unit. I didn't check mine, just assumed it would be installed, and had a huge mess to clean up in the bay after I used the vac. I know, never assume anything!
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oh yeah we put a bag in it first thing, after i removed all the debris someone had sucked up at the dealer.
__________________
USN Retired, Life time member of the DAV.
Enjoying the 2008 Damon Tuscany 4056, #3998 no your eyes are fine, there are really 6 slides
2022 F150 King Ranch or 2012 Edge toads
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