Any UFO’s in the area? Sent from my iPhone
> On Sep 26, 2019, at 3:26 PM, Ian Matthew via CnC-List <cnc-list@cnc-list.com> > wrote: > > I have been following the list for many years and I enjoy reading the wisdom > of this group. I have an interesting problem and seek your advice. > > I have an very intermittent electrical problem (in fact it has only happened > twice in the last 7 years. In both cases it has resulted in electrical / > electronic components becoming 'blown out' with all fuses inline remaining > good. > > The first time I suddenly lost my AM/FM radio and ALL my navigation lights. > The engine also stopped as I had no power to drive the electric fuel pump. > This happened when motoring back home at night after a long race. > Fortunately there was wind and a hand-held VHF and a powerful spotlight on > the sails allowed us to be seen by commercial traffic. Afterwards, I checked > - ALL the incandescent bulbs that were on had blown, but the fuses were OK. > The radio had internal circuit board components blown but again the inline > fuses (there are 2) were OK. In the case of the fuel pump, this had to be > replaced. > Thinking this may have been a spike from the alternator, I replaced the > alternator. > > Last week (3 years later), motoring back in the dark I had a similar problem, > but this time only my VHF radio 'blew'. Again the inline fuse was good. The > navigation lights have been replaced with LED lights and the AM/FM radio was > off. > > I often motor after long races and this has only happened twice! > > Does anyone have any ideas as to what may have caused this. I am an engineer > so can diagnose most things but this has baffled me. > > I am about to upgrade my VHF radio for one with DSC and internal GPS and to > add some wind instruments. (I have a Raymarine knotmeter/depth meter > combined, and a EV-100 autopilot.) I want to separate my electronics > electrical input and have considered putting them on an isolated battery, but > charging is a problem. Is there some circuit protector I can put in place to > stop this happening again? > > All suggestions welcomed. > > BTW - for those of you with 29 mk 1's - you can race them competitively in > strong winds (as is usual on San Francisco Bay) - keep the boat flat and have > a really good crew! > > > -- > Ian Matthew > "Siento el Viento" C&C 29-1 > San Francisco Bay > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and > every one is greatly appreciated. If you want to support the list - use > PayPal to send contribution -- https://www.paypal.me/stumurray > _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
