1937 ignition coil specs

Posted by R Howe On 2018/5/18 16:36:55

I am not getting spark to the plugs when I'm turning my 1937 120 engine over. I did research on the resistance specifications of ignition coils, mostly of the modern type. The resistance between the outside terminals should read between .7 and .8 ohms, but for a 12-volt system. The resistance between the output line to the distributor and the outside terminals should be between 10,000 and 11,000 ohms, again for a 12-volt system.
I am using a modern coil for 6-volts but the between terminal resistance is between .3 and .4 ohms, although I am getting readings between 10,000 and 11,000 ohms from the central terminal.
My question is, does anyone know if this reading between the outside terminals is normal for 6-volt systems since is it approximately hals of that for 12-volt systems? Im still looking at the condenser and points, but it is the coil output in which I am most interested at the moment.
Thanks.