High pitched squeal

[leinsterrugby]

My autocom super pro avi is acting up. I got on the bike to ride home tonight and there was a very loud hi pitched squeal coming out of my autocom thorugh my helmet!

Disconected the Zumo and restarted the bike - same deal.

Tried the pillion lead and yep same deal - a continious high pitched squeal.

The bike hasn't been near water, dropped, left outside overnight, modified or had any changes made to it.

Anyone got any ideas????

Thanks

 

[GSrich]

I would say that you have got a faulty headset, email me at work on [email protected] and I will get you sorted.

Rich

 

[Zoomboxer]

My autocom super pro avi is acting up. I got on the bike to ride home tonight and there was a very loud hi pitched squeal coming out of my autocom thorugh my helmet!

Anyone got any ideas????

Thanks

Are you sure the blokes next door are not

That would explain the noise...

 

[leinsterrugby]

I would say that you have got a faulty headset, email me at work on [email protected] and I will get you sorted.

Rich

Rich, that's fantastic! Thanks

 

[csd4t]

Me too, same set up. zumo and super pro avi. First high pitched squeal then after disconnecting and reconnected ok for a few miles then squealing again then nothing. Just what I needed trying to negotiate Madrid in the pi**ing rain. Just realised I have another headset in the wife's helmet so will try that next.

 

[TrickyWoo]

Wow is this ever a coincidence! I have the exact same problem on the same setup - iPod, SuperProAvi and Zumo 550. 20 minutes of sheer hell then all quiet again. I called Autocom this morning who say it 'could be a number of things' which of couse makes sense. The mic isn't plugged in so if it happens again I'll try playing with the noise sensor and if that doesn't fix it I'll email as above.

 

[GSrich]

Mate, Ive just replied to your email but it just bounced back at me so please do not think that I am ignoring you.

Give me a buzz on 01926 431249 and I will talk you through what I need to do.

Cheers

Rich

 

[csd4t]

Is that me or Trickywoo?

 

[GSrich]

Eeeer good question, whoever emailed me at work lol

Rich

 

[Norrie]

HI GSRich

I have a pro avi fitted to my 1150Adv on a recent trip I also encountered the whinning noise through the headset,GPS (2610) mounted to the bike and occassionaly the i pod, I have the telephone option but never used.
On two occassions there were two very high pitched noises which nearly bust SWMBO eardrums (No earplugs worn at the time)

Be grateful for any tips on resolving the probs

Schultz

 

[meanbiker]

I had this happen in the early days of my Pro avi. I never did get to the bottom of why, but have not had it happen in the last year or so. Not much help I know as it just went away, but worth registering that you are not alone!

 

[Norrie]

Thank's Meanbiker it's comforting to know other's have had the same problem and I haven't messed the system up

Schultz

 

[GSrich]

I do not know what is actually causing the sounds everyone is hearing as this is a new problem to me. Could people let me know the riding conditions at the time the noises were being heard as this might help me along.

Cheers

Rich

 

[Norrie]

Hi Rich

In our case we were travelling between Riems and Calais on the Auto Route
and the distance between the first and second V high pitched squeal would have been at the most 12miles.
weather conditions were dry but overcast and only the GPS running at the time.
The whinning that i mentioned is constant and only dies off when someone speaks or you get instructions from the GPS.

Schultz

 

[daesimps]

I know this is an old thread, but did you get to the bottom of the issue?

I bought an autocom 300 2 weeks ago and it has been working fine. It's connected to the zumo with the 1314 and bluetooth dongle.

Then yesterday on the way back I got a painful squeal. I disconnected the headset and about 10 minutes later reconnected with no problems. About 15 miles later it did it again. I removed the Zumo but that didn't cure it. Unfortunately I couldn't test anything else as that would have meant turning the ignition off to get at the unit under the seat and this would have rebooted the unit.

Put the Zumo back on about 20 mins later in services and was fine for the rest of the journey. The weather was dry, the cable doesn't have any dirt in it so I know it's neither of these issues causing it.

Thanks
Dae

 

[Twister]

I had the same problem with the squealing noise yesterday through my autocom speakers. I checked the wiring below the seat and found that the earth wire from the Zumo had come loose. I earthed the zumo whilst the squealing was still happening and it stopped. All connections have been fixed and everything is tinkyboo again

 

[daesimps]

Unfortunately I have checked both earths (Autocom and Zumo) and everything is ok. Disconnecting the zumo (complete removal) did not help.

Thanks anyway

Dae

 

[madmax]

Just got in from a run and about 3 miles from home I got this god awful ear drum piercing squeal through the headsets. Had to get pillion to disconnect us both before it blew our eardrums, I have the Autocom pro 300 + tomtom rider 2 + i pod, first time its ever done any thing like this.
I've tried swapping leads, unplugging 1 at a time, no i pod, no tomtom, and every other combination i can think of, but the squeal goes on.
Any body have a solution? it's only 12months old if that.

 

[Wiz]

I know this is an old thread but I thought I'd let you guys know what the problem is in case someone else finds it.

The terrible high pitched scream is caused buy overloading the circuit that powers the bike-bike radio. The voltage regulator in the Autocom which powers the radio is rated at under 1 amp and it isn't very well heat-sinked, so if you transmit for a long time or connect a powerful radio, you'll overheat the voltage regulator, which then causes the Autocom to scream into your lug-holes in a rather terrible way (especially if you use in-ear speakers!" Usually if you leave the Autocom for a long time (sometimes several days) it'll start working again, but the tolerance of the parts becomes less and it becomes even more susceptible to shrieking again if you connect the radio.

There is a solution, here's a copy of a post I made on the VFR site...

Just found something I've been hunting for ages and so thought I'd share.

You probably know that you cannot power a high power (5 watt) radio from an Autocom as the components used inside the Autocom itself are not rated for high power use. You can usually make them work for a short while, then they burn out the voltage regulator and your Autocom starts emitting a ear-splitting scream into your lugholes.

The problem component is an IC voltage regulator (L7809) which drops the 12-14v bike input voltage to 9v, however, it is only rated at 1.5a max even with some serious heat sinking and if you transmit for longer than just a few seconds you're likely to fry it.

The obvious answer would seemingly be to buy a cheap cigar lighter battery saver for your radio from eBay and power it directly from the bike, however if you do this, you'll get terrible a crackling and popping on both transmit and receive as they are a simple resistor/coil design which causes a serious ground loop interference problems when the radio is connected to an Autocom.

So, here's finally a solution! It's a small IC made in the Philippines designed specifically to replace the L7809 with one that can deliver up to 4 amps and 35 watts! More than enough for a 5 watt radio. As it uses a IC regulator to deliver the power, they'll be no ground loop issues. It doesn't even need a heat-sink, so it could be soldered directly onto the radio or put into a cheap battery saver or old battery case.

Here's a link:

http://www.ebay.co.uk/itm/15-23V-to...984?pt=LH_DefaultDomain_0&hash=item3f0f0426e0