MTFCA Forum

would someone explain why dv/dt is an important parameter in coils which originaly had caps with high inductance and resistance. it was probably not even a consideration back then. high speed in the caps dont hurt but is it needed in t coils. a high voltage rating is better. distributor ignition cap...

All capacitors have a dv/dt rating. what do you want high or low.

It seems to me that it would take longer for them to reclose as when opening they are pulled open by the magnet against the spring and the opening is delayed by the gap in the points. They return by spring power and if I have this right the inductive kick current in the primary would tend to hold th...

It seems to me that it would take longer for them to reclose as when opening they are pulled open by the magnet against the spring and the opening is delayed by the gap in the points. They return by spring power and if I have this right the inductive kick current in the primary would tend to hold th...

Ron
I am curious as to how long it takes for the points to reclose after firing in a properly adjusted coil? In your discussion it shows about 2 ms for the points to open but I don't suppose that the time to reclose is symmetrical.

may be on dc a bit but I don't think so on ac as the ac cycle has some control of timing. if the coil buzzes you will have the dreaded multi spark. this Is an advantages when every thing is just right and when you turn the key on the multi spark may get you a free start. anyway how long is a buzz

coils don't buss except when not running with key on. when running the points on the coil should open only once to fire spark plug. buzzing is not good. when running on battery dc they should only open once and not buzz.

acid is very good conductor and so are its salts. your plugs are shorted. most salts are water soluble so you might save them by a long soak I water.

  A Test Tube works great for a glass replacemnet.   IMG_3532.JPG the fuse Is a good addition. when I got mine the points were welded together and the springy part witch the ball hits was burned in two. had to make a new one. a rain gauge tube is about the same length as the coil box looks neat exc...

got one that was missing tube found that a rain gauge tube works fine. use glass marble not ball bearing.

Does anyone have a conversion chart for Edison plugs? I have several boxes of new plugs of various sizes and don't know their application.

If i am not mistaken aviation gas still contains lead. Glad to finally get back had to register used to be gridleak.