On 5/17/2012 6:02 AM, Jake Anderson wrote: > I often wonder about the clamps on jumper cables, > They all seem to just have a small number of contact surfaces, I often > wonder if something like a half inch wide copper braid under the clamp > would do the job better than just the jaws. > sure they are good at biting through the oxide but still your only going > to have a few square mm at best. > > Most modern cars have teensy wires from the engine to the battery, just > big enough for the starter to turn over, I wouldn't be surprised if > there was 1-2 volts of drop in the loom on a modern car. > (older cars are generally better but no guarantee, I've improved the > starting of many cars by running new ground and a dedicated power wire, > from alternator to battery and starter) > So going to the block can be quite helpful. > > Another tip I have used more than once is when somebody has toy cables > just rip the wire out of the clamp (its generally not hard, you can do > it by hand) then wrap the wires around the terminals/connections > much better connection. > I have seen that done too. On older cars I have seen people loosen the=20 terminals on the battery and put the wire inside and re-tighten . I=20 think that since jumper cables don't get used often most people just buy=20 whatever the cheapest ones are and just put up with the problems they=20 may cause . Mark --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .