Who makes a good stable carbon pile? Stable as in it maintains its resistance as current is varied. 200 amp range, 100 VDC. Currently using a battery load tester but I want something I can mount on my own equipment. e.g. I have DC motor that I want to voltage up to see how it draws.
Carbon Pile
Started by ●May 14, 2014
Reply by ●May 14, 20142014-05-14
In article <ll0tqf$l82$1@speranza.aioe.org>, spamnot@nospam.com says...> > Who makes a good stable carbon pile? > Stable as in it maintains its resistance as current is varied. > 200 amp range, 100 VDC. > Currently using a battery load tester but I want something I can mount > on my own equipment. > > e.g. I have DC motor that I want to voltage up to see how it draws.isn't that kind of a poor way of throttling a motor? Jamie
Reply by ●May 15, 20142014-05-15
On Thursday, May 15, 2014 12:21:42 AM UTC+1, OldGuy wrote:> Who makes a good stable carbon pile? > Stable as in it maintains its resistance as current is varied. > 200 amp range, 100 VDC. > Currently using a battery load tester but I want something I can mount > on my own equipment. > e.g. I have DC motor that I want to voltage up to see how it draws.I thought carbon piles were almost a century out of date. You could always make one from the carbon rectangles in discarded 9v batteries. Surely there are easier ways to speed control a motor though. If you must do it old school, a salt water dimmer is far quicker to make. Sometimes dubbed a scariac. NT
Reply by ●May 19, 20142014-05-19
meow2222@care2.com wrote:> > On Thursday, May 15, 2014 12:21:42 AM UTC+1, OldGuy wrote: > > > Who makes a good stable carbon pile? > > Stable as in it maintains its resistance as current is varied. > > 200 amp range, 100 VDC. > > Currently using a battery load tester but I want something I can mount > > on my own equipment. > > e.g. I have DC motor that I want to voltage up to see how it draws. > > I thought carbon piles were almost a century out of date. You could always make one from the carbon rectangles in discarded 9v batteries. Surely there are easier ways to speed control a motor though. > > If you must do it old school, a salt water dimmer is far quicker to make. Sometimes dubbed a scariac. > > NTWhere are you getting 9V batteries made like that? All I've seen for years are made from six AAAA cells. -- Anyone wanting to run for any political office in the US should have to have a DD214, and a honorable discharge. --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com
Reply by ●May 19, 20142014-05-19
On Wednesday, May 14, 2014 7:21:42 PM UTC-4, OldGuy wrote:> Who makes a good stable carbon pile? > > Stable as in it maintains its resistance as current is varied. > > 200 amp range, 100 VDC. > > Currently using a battery load tester but I want something I can mount > > on my own equipment. > > > > e.g. I have DC motor that I want to voltage up to see how it draws.Look for sewing machine foot pedals. The old ones had carbon piles and the new ones might be an alternative to carbon piles.
Reply by ●May 19, 20142014-05-19
Michael A. Terrell <mike.terrell@earthlink.net> wrote:> > meow2222@care2.com wrote: >> >> On Thursday, May 15, 2014 12:21:42 AM UTC+1, OldGuy wrote: >> >> > Who makes a good stable carbon pile? >> > Stable as in it maintains its resistance as current is varied. >> > 200 amp range, 100 VDC. >> > Currently using a battery load tester but I want something I can mount >> > on my own equipment. >> > e.g. I have DC motor that I want to voltage up to see how it draws. >> >> I thought carbon piles were almost a century out of date. You could always make one from the carbon rectangles in discarded 9v batteries. Surely there are easier ways to speed control a motor though. >> >> If you must do it old school, a salt water dimmer is far quicker to make. Sometimes dubbed a scariac. >> >> NT > > > Where are you getting 9V batteries made like that? All I've seen for > years are made from six AAAA cells.those are the alkaline ones. there's got to be a school in china still making dry cells.
Reply by ●May 19, 20142014-05-19
On Mon, 19 May 2014 09:08:06 -0400, Michael A. Terrell wrote:> meow2222@care2.com wrote: >> >> On Thursday, May 15, 2014 12:21:42 AM UTC+1, OldGuy wrote: >> >> > Who makes a good stable carbon pile? >> > Stable as in it maintains its resistance as current is varied. 200 >> > amp range, 100 VDC. >> > Currently using a battery load tester but I want something I can >> > mount on my own equipment. >> > e.g. I have DC motor that I want to voltage up to see how it draws. >> >> I thought carbon piles were almost a century out of date. You could >> always make one from the carbon rectangles in discarded 9v batteries. >> Surely there are easier ways to speed control a motor though. >> >> If you must do it old school, a salt water dimmer is far quicker to >> make. Sometimes dubbed a scariac. >> >> NT > > > Where are you getting 9V batteries made like that? All I've seen for > years are made from six AAAA cells.Carbon-zinc super heavy duty, apparently. 6 lozenges stacked. Are those thick black plates carbon, or compacted battery gunk? Dunno. I'll take a stab at putting a pic on abse. -- /home/wond/Documents/sig.txt
Reply by ●May 20, 20142014-05-20
On Monday, May 19, 2014 2:08:06 PM UTC+1, Michael Terrell wrote:> meow2222@care2.com wrote: > > > On Thursday, May 15, 2014 12:21:42 AM UTC+1, OldGuy wrote:> > > > Who makes a good stable carbon pile? > > > Stable as in it maintains its resistance as current is varied. > > > 200 amp range, 100 VDC. > > > Currently using a battery load tester but I want something I can mount > > > on my own equipment. > > > e.g. I have DC motor that I want to voltage up to see how it draws.A series lampholder might do you, just pick a filament bulb to suit.> > > I thought carbon piles were almost a century out of date. You could always make one from the carbon rectangles in discarded 9v batteries. Surely there are easier ways to speed control a motor though. > > > If you must do it old school, a salt water dimmer is far quicker to make. Sometimes dubbed a scariac.> Where are you getting 9V batteries made like that? All I've seen for > years are made from six AAAA cells.The ones I opened a few years ago were all stacked flat rectangle cells. No idea what types they were. I think usually they're whichever version you dont want. NT
Reply by ●May 20, 20142014-05-20
wanderer wrote :> On Wednesday, May 14, 2014 7:21:42 PM UTC-4, OldGuy wrote: >> Who makes a good stable carbon pile? >> >> Stable as in it maintains its resistance as current is varied. >> >> 200 amp range, 100 VDC. >> >> Currently using a battery load tester but I want something I can mount >> >> on my own equipment. >> >> >> >> e.g. I have DC motor that I want to voltage up to see how it draws. > > Look for sewing machine foot pedals. The old ones had carbon piles and the > new ones might be an alternative to carbon piles.The OP said 200 (TWO HUNDRED) amps. Nothing mentioned so far comes anywhere near being capable of 200 AMPS. :-? -- John G
Reply by ●May 20, 20142014-05-20
In article <9oGdncjuh_FYc-bOnZ2dnUVZ_qWdnZ2d@westnet.com.au>, greentest@ozemail.com.au says...> > wanderer wrote : > > On Wednesday, May 14, 2014 7:21:42 PM UTC-4, OldGuy wrote: > >> Who makes a good stable carbon pile? > >> > >> Stable as in it maintains its resistance as current is varied. > >> > >> 200 amp range, 100 VDC. > >> > >> Currently using a battery load tester but I want something I can mount > >> > >> on my own equipment. > >> > >> > >> > >> e.g. I have DC motor that I want to voltage up to see how it draws. > > > > Look for sewing machine foot pedals. The old ones had carbon piles and the > > new ones might be an alternative to carbon piles. > > The OP said 200 (TWO HUNDRED) amps. > Nothing mentioned so far comes anywhere near being capable of 200 AMPS. > :-?Large variac with rectifier ? Jamie
