Do watts = strain?
Elder User
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Originally Posted by Bob Ayers
All capacitors have what's called a ESR, Effective Series Resistance, and will vary depending on the materials used in the capacitor, as well as the manufacturer of the capacitor.
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Junior User
Joined: Jan 2004
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From: Sierra Nevada Mountains
Ok I found a 170 amp alternator for about $200. That seems like that will work. Now I just need to find a place for the second battery. I am hesitant to put it in the back, because of the whole toxic fumes and venting nonsense. I looked around under the hood, but it didn't seem to leave me any options. Any suggestions there?
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From: Big Red country
"Anyway, electricity does not travel at the speed of light - wish it did. Would make my life easier. "
Electricity does travel at the speed of light. I don't know how that would make your life easier, unless you are hiding a transporter in your basement or garage.
Anyway, The Snoman basically restated what I was saying, just in a different way. At anyrate, I don't own one and never will. To each his own. If it helps you, great.
Electricity does travel at the speed of light. I don't know how that would make your life easier, unless you are hiding a transporter in your basement or garage.
Anyway, The Snoman basically restated what I was saying, just in a different way. At anyrate, I don't own one and never will. To each his own. If it helps you, great.
"Mifflin Clay"
Joined: Jul 2005
Posts: 3,177
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From: Mifflin, PA
Originally Posted by scafes
"Anyway, electricity does not travel at the speed of light - wish it did. Would make my life easier. "
Electricity does travel at the speed of light. I don't know how that would make your life easier, unless you are hiding a transporter in your basement or garage.
Anyway, The Snoman basically restated what I was saying, just in a different way. At anyrate, I don't own one and never will. To each his own. If it helps you, great.
Electricity does travel at the speed of light. I don't know how that would make your life easier, unless you are hiding a transporter in your basement or garage.
Anyway, The Snoman basically restated what I was saying, just in a different way. At anyrate, I don't own one and never will. To each his own. If it helps you, great.
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Joined: Nov 2005
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Originally Posted by alchymist
Electricity does NOT travel at the speed of light. Whoever told you that is wrong. Electric and magnetic FIELDS travel at the speed of light. Electrons traveling in a conductor absolutely do not travel at the speed of light. I work in the rf field, and one thing I deal with is called "propagation delay" - the amount of delay an electrical current is delayed while traveling down a conductor. In some case it can be as slow as 60% of the speed of light.
Postmaster
Joined: Jul 2004
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From: Bixby, OK
Electricity itself is as fast as the speed of light but it's the resistance of particles which slows it down. But I don't care. I'm trying to give this guy the easiest way to upgrade his system, if you want to argue about caps then do it in another thread. But, if you do that, attack the situation, not any people.
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Originally Posted by RomerB2
Electricity itself is as fast as the speed of light but it's the resistance of particles which slows it down. But I don't care. I'm trying to give this guy the easiest way to upgrade his system, if you want to argue about caps then do it in another thread. But, if you do that, attack the situation, not any people.
Senior User
Joined: Nov 2004
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From: Independence, Missouri
Better alternator is always recommended. Then just get yourself a nice Gel Cell battery. All my customers are happy with a SVR battery. I run dual SVR batteries. One for the truck itself and one for the system. I run a custom dual alternator bracket with twin 185 amp alternators from Ohio Generator. Have not added the belt for the second alternator but will soon when I install the demo system that is taking up room under my pool table.
In over 15 years of professional installation I have never been happy with a capacitor. Alot of people defend them but even my DB Drive techs recommend just adding batteries. I think alot of the ones defending and recommending them are people who have spent so much on them....lol I use them as a last resort if there is limited space for a battery. If so then I make sure it's a quality one. There are alot of them that are all from the same place...just have a different wrapping.
In over 15 years of professional installation I have never been happy with a capacitor. Alot of people defend them but even my DB Drive techs recommend just adding batteries. I think alot of the ones defending and recommending them are people who have spent so much on them....lol I use them as a last resort if there is limited space for a battery. If so then I make sure it's a quality one. There are alot of them that are all from the same place...just have a different wrapping.
Postmaster
Joined: Jul 2004
Posts: 3,624
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From: Bixby, OK
I see the use for a cap, but a nice battery will do the same thing! Like a gel-cel like KC said. I'm saying if you upgrade the wiring ($15) and put in a new battery (~$130) you can easily compensate the "power" that a cap has. And your other components from the electrical system don't benefit from a cap. That's what I'm trying to say.
"Mifflin Clay"
Joined: Jul 2005
Posts: 3,177
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From: Mifflin, PA
Originally Posted by The SnoMan
It is called "velocity factor" and it is generally its slowest in sheilded cables and it fastest in open single wires and it is also depends on the frequency of the signal or current and then we could even get into the "skin effect" were current flows on the ouside of conductor but it does not apply here either. 60% is way low with 85 to 90% or more being more the norm here. Unless you are spliting hairs, calling it the speed of light is close enough for here. Also you are starting to skirt on inductive and capacitve reactances of a feed line where volage can lag current or current can lag voltage but this is primarily a factory in RF circuits, not in DC power feeds here, Trying to mudding the water with this accomplishes nothing on this issue unless you are trying to impress someone.
Last edited by alchymist; Jan 12, 2006 at 04:40 AM.
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Originally Posted by alchymist
Who's muddying the waters? Not trying to impress anyone....i was merely trying to correct some misconceptions. Excuse me if i have darkened the H20..... And guess what - shielded cables are one of the many things I deal with daily, at frequencies to 20 Ghz, so I feel I have an idea about what is going on. And yes, I also work with LVHC DC supplies, up to 500 Amps, so I understand the low end also.........And just wait until the spike generated by the starter solenoid hits any of the electronics common in todays vehicles - any idea on the rise time of that, and what cap could supress it?
WHen you want lowest possible IMD from a amp on of the most inportant thing is a good stable and clean power source and that is not possible with just a battery and a altenator setup. Put a scope on the power feed to amp with a battery and a big altenator and watch the "noise" in the single for voltage changes and hash and them compare it with a few farad Cap bank installed. The difference is night and day.
Last edited by The SnoMan; Jan 12, 2006 at 05:47 AM.
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From: Utah
Man this opened up a Can of Worms. :-) Fishing anyone.
I think a lot of it boils down to personal preference. IMO, I would rather play safe then sorry from past experience, and run with the Capacitor. Todays technology and Batteries combined with a good high amp Alternator may do the trick, but good insurance never hurts.
I may be wrong as there are so many thing that contribute to a good hitting bass without distortion, but it seems like it is a lot more clear with the capacitor as it seems to take a lot of the static out of it.
I think a lot of it boils down to personal preference. IMO, I would rather play safe then sorry from past experience, and run with the Capacitor. Todays technology and Batteries combined with a good high amp Alternator may do the trick, but good insurance never hurts.
I may be wrong as there are so many thing that contribute to a good hitting bass without distortion, but it seems like it is a lot more clear with the capacitor as it seems to take a lot of the static out of it.
Lead Driver
Joined: May 2004
Posts: 6,461
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From: Abilene Kansas
Better alternator is always recommended. Then just get yourself a nice Gel Cell battery. All my customers are happy with a SVR battery. I run dual SVR batteries. One for the truck itself and one for the system. I run a custom dual alternator bracket with twin 185 amp alternators from Ohio Generator. Have not added the belt for the second alternator but will soon when I install the demo system that is taking up room under my pool table.
Matt