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Matthew A.

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  1. Hi Ante, I failed to recall that I had posted a similar post seeking help with understanding rectifiers on this particular forum. My apologies to those who shared their time and knowlegde in response to my original post. I assure you your efforts in helping me are very much appreciated and have not gone to waste.
  2. I am seeking advice on how to determine what voltage and current ratings a bridge rectifier is required for a charging circuit. The circuit consists of a stator, 12 volt lead acid battery, 12 volt DC accessories, and the rectifier. The charging circuit produces a maximum of 7 amps DC current. The stator's output is between 180-200 volts AC. This circuit does not rely on a voltage regulator to prevent the possibility of voltages higher then 16 volts DC being sent to the battery and components that maybe damaged above 16 volts DC. I know the current rating for the bridge rectifier is 20 amps. H
  3. Thank you Dazza, MP, and everyone, for the time and help you all have given me. The knowledge each of you has shared has been of great help and value to me and is greatly appreciated. :) Matt
  4. Uhh.....umm... Well...eh...alrighty then. Sounds like you had yourself a blast! Keep up the good work!
  5. Looks like Greek to me. lol Perhaps adding a regulator is not what I should be focusing on. I'd like to be sure I am grasping the concept behind my outboards charging circuit. The stator is rated at 200 volts AC , 7 amps. Between the stator and battery is a rectifier to switch AC into rectified AC...more or less turns AC into DC by filtering only one half of AC's signwave at any given moment. Now here's my grey area. What is limiting the voltage going to the battery. Meaning howcome the battery isn't getting 200 volts DC of the stators 200 volts AC output once it has passed thru the rectif
  6. Thank you MP and audioguru. From the detailed information you've each kindly given me, I don't feel quite as much in the dark as I was before. Why use a light bulb instead of building a circuit that would do the same thing? Usually there's concern when using filament bulbs in areas subject to strong vibrations. Like a car enviroment. Does a light bulb have certain non-cost related advantages over building a circuit of same purpose? Going by what you have told me and from what I can see looking at the schematics, the light bulb makes up part of the amps protection circuitry. Correct? Also, n
  7. That makes perfect sense. Thanks Ante! ( This forum shreds) 8)
  8. Considering that we have taken our little 17 foot Bayliner Capri some 60 plus miles offshore numerous times would make most have to question our intelligence out on the water. Such is the draw of the ocean. We do have a kicker motor on board just in case the main should fail us. One bit of reassurance out on the water is the fact that in San Diego CA. waters there is never a boat farther away then 5 to 10 miles and almost always they're within sight. Anyways, I have ran tests on the stator, trigger assembly, CDI modules, battery, and wiring. Everything is within spec. except for the deep cylc
  9. Inside my car audio amplifier I noticed a very tiny tungsten filament light bulb. I cannot for the life of me figure out what it's purpose is. The layout of the components on the PCB is extremely clean. Here's a link to the schematic I was able to download free after I visited one of the recommened german sites for finding schematics that I read on this site although a different forum. Anyhoot...here's my schematics showing the light bulb.
  10. Using a regulator is something that I will no longer go without. Ruining batteries due to overcharging them is getting very costly and more then I can currently afford. Plus...replacement CDI packs go anywhere from $160 to $399 each. Loose or bad battery connections or a battery that is overcharging will almost always cause a circumstance in which blows a diode that is used to block the firing signal between the two CDI packs. I just want to have a system that will develope enough current to keep the starting battery charged as it also limits voltage to the battery at around 15 volts DC. I al
  11. Hi Hi Kevin, Since larger diodes provide better regulation then smaller ones and how most similar-in-amperage diodes (to the OEM rectifier used on my outboard) all seem tend to have a centered hole for fastening it down to a bracket or mounting location, are probably two factors they may have decided to use a rectifier with such a high amperage rating. Especially considering that the stator only produces a maxium amount of AC current of 7 amps. Plus, another reason maybe due to they purchase them in bulk so they probably pay less then $1.00 each for them while selling them for $45.00. US. Us
  12. Hi Dazza, I'm not certain if you are still interested in the developement of this thread but this is what I have been able to ascertain thus far. After consulting an outboard motor specialist on a forum specializing in outboard motors, I was informed that since my motor does not incorporate a voltage regulator on the charging circuit, the battery must deal with whatever DC voltage that gets sent it's way and why it is recommended that only high quality non-maintenance free battery's be used. High quality or not, batteries are not cheap so I intend to replace the OEM rectifier with rectifier w
  13. Well Suraj, I'm just happy that my friend will now no longer be able to back me into corner in this one area of discussion. Although, it only does so in a round about way, the link to the psuedoscience page you posted most defineately confirms my theory. With the information I have now acquired, I'll be ready to put it to her straight the next time my friend wishes to square off with me on the subject.
  14. What's even funnier is that it doesn't matter what claims are made as far as amplifiers and electrical watt ratings. When it is musical watts that we hear. And musical watts at normal listening volumes are way low. P.S. I have one thing to say about discrete transistors vs. mosfets. And that is.......slewrate.
  15. My friend insists that it is impossible to determine the square root of pie because, as everyone knows, you cannot fit a square into a circle. I told him it can be done as long as one remembers to round off first. :o
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