Google that for the best rating. I was hosed by one shop, treated like a king by another. The good shop was cheaper, but I wouldn't count on it.
Jim Watts Paradigm Shift C&C 35 Mk III Victoria, BC On 1 November 2016 at 19:24, Chuck S via CnC-List <cnc-list@cnc-list.com> wrote: > Usually, there is a shop that specializes in alternator and starter > repairs for cars somewhere nearby. Google that for the best price. > > > Chuck > Resolute > 1990 C&C 34R > Broad Creek, Magothy River, Md > > On November 1, 2016 at 2:26 PM David Knecht via CnC-List < > cnc-list@cnc-list.com> wrote: > > I took the alternator out of the boat last weekend so I could get it > tested. Any suggestions on where to take it? Would a good auto repair > shop be able to do this, or do I need someone more specialized. Dave > > Aries > 1990 C&C 34+ > New London, CT > > > On Oct 3, 2016, at 12:07 PM, Jerome Tauber via CnC-List < > cnc-list@cnc-list.com> wrote: > > If it's rf noise generated by the alternator it may be coming in through > your GPS antenna as well as data or power lines. If it is rf noise > you should be able to hear it with a small AM radio held nearby (tune to > around 1400 KHz). I still think your voltage regulator is suspect. When > the battery reaches its maximum charge of approximately 14.2 volts, the > regulator will then limit the alternator's output. The battery acts as a > buffer so that may be what's causing the problem to sometimes not show with > the engine on.. If the engine has been off for a while the > battery voltage may fall in the 12's and it may take a while for it to > overcharge into the 14's where your chart plotter may start to act > erratically again. When you turn off the engine it may take a few minutes > for the voltage to drop back into a safe level. You said you are > measuring in the 14 volt range with the engine on. If it is above 14.2 > that would be suspect. Jerry J7J > > > -----Original Message----- > From: Della Barba, Joe via CnC-List <cnc-list@cnc-list.com> > To: 'cnc-list@cnc-list.com' <cnc-list@cnc-list.com> > Cc: Della Barba, Joe <joe.della.ba...@ssa.gov> > Sent: Mon, Oct 3, 2016 11:08 am > Subject: Re: Stus-List Chart plotter problem > > You could try something like this: > http://www.ebay.com/itm/NEWMAR-PC-25-Noise-Filter- > Power-Conditioner-25-amps-/231859240381?hash=item35fbe33dbd:g: > Zn0AAOSwPc9W0ftz&vxp=mtr > > Oscilloscope (scope) https://en.wikipedia.org/wiki/Oscilloscope FYI > If you know any ham radio operators, they probably know where to find one > to borrow. > > Your plotter also could just be nuts ;) > Joe > Coquina > > > From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of David > Knecht via CnC-List > Sent: Monday, October 03, 2016 09:56 > To: CnC CnC discussion list > Cc: David Knecht > Subject: Re: Stus-List Chart plotter problem > > Hi Joe and thanks for your input. Some answers below. > > Aries > 1990 C&C 34+ > New London, CT > > <image001.png> > > > On Oct 3, 2016, at 9:11 AM, Della Barba, Joe via CnC-List < > cnc-list@cnc-list.com> wrote: > > Some things to try: > 1. Run the plotter off its own battery. Little 6 ah AGM batteries > are cheap enough if you don’t have a spare battery sitting around. > Given the intermittent nature of the problem, this would be challenging to > do long enough to be definitive. I am also not sure it will identify the > source of the problem since it appears to be the power (see below). > > 2. Put a scope on the DC bus to see what, if any, AC/noise is on the > line. Include an engine start with this. > I don’t have a scope and have not used one. What kind of device would you > do this with? > > 3. Disconnect the NMEA interconnection and see what happens. > As I said, when this happened last week, the NMEA input was disconnected > from the chart plotter, so this seems to be coming from the power > connection. What is frustrating is that yesterday, I started the engine > twice, once before and once after the race, and the chart plotter behaved > perfectly and never beeped once. Nothing was obviously different?????? > > > > 4. Check the NMEA connection for configuration. Does the plotter > send and receive data or just send? No need to have the NMEA input line > connected if there is no data headed that way. > 5. Put a laptop on the NMEA connection or run the diagnostic window > on the plotter, if it has one, and read the raw NMEA stream to see if it is > getting some odd data or any data at all if it should not be. > 6. Put ferrites on all incoming wiring. > 7. Check for ground loops and NMEA isolation* > * > This one is a bit tricky. First off, make sure the power supply and ground > connections are at exactly the same place as your other electronics. Ground > loops are bit complicated to explain and hard to find, but the short > version is this step will eliminate some of them. Second is check with the > manufacturer to see if your plotter NMEA connections are true marine > standard opto-isolated. It is very possible to use direct wiring to NMEA > data and not isolate it, my laptop/plotter does just that, but optical > isolation prevents various stray voltage and ground issues from messing > up the data. Equipment is fairly resilient now, but back in the day an > engine start could generate noise that would totally screw up electronics. > Even now I will start an airplane with all radios and nav equipment off and > then turn it on. I once was delivering an airplane that had a screwy > alternator I had to switch off to use the radios and nav gear and then > switch back on when the battery got low. > BTW – my boat is wired so the engine start battery is usually separate at > engine start and has no effect at all on the electronics. They don’t > combine until charging voltage is present for a few minutes. Is yours like > that? > Joe > Coquina > C&C 35 MK I > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > like what we do, please help us pay for our costs by donating. > All Contributions are greatly appreciated! > _______________________________________________ > > This list is supported by the generous donations of our members. If you > like what we do, please help us pay for our costs by donating. All > Contributions are greatly appreciated! > > > > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > wish to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated! > > > _______________________________________________ > > This list is supported by the generous donations of our members. If you > wish to make a contribution to offset our costs, please go to: > https://www.paypal.me/stumurray > > All Contributions are greatly appreciated! > >
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