Some I have
Yes! I mean “OLD” lol!What do you mean OLD Jacobs ?
I remember buying Jacobs like it was yesterday ! Lol
I had a REALLY REALLY bad attitude about "old Jacobs" for a very long timeYou mean like the old Jacobs systems from the late 80’sView attachment 1715803053
I had a REALLY REALLY bad attitude about "old Jacobs" for a very long time
In the early 70's they marketed a small device they called something like a "see dee' or "cee dee" or something, incinuating it was CDI. Not only was it NOT, it was almost a scam. Friend of mine took it apart, and there was something like 2 components in the thing. JUNK
This was a very small unit looked vaguely like the top of an ignition coil. I can find nothing on these
You won't see 300 volts across the coil on a multimeter... the 1.5 uF cap is charged to several hundred volts and "dumped" into the coil when the SCR fires. That pulse is very short and a meter can't respond to it. Now an oscilloscope will tell a different story.MARK TEN B..on my Mazda! i dont think it works as the switch IN/OUT doesnt seem to do anything but when its CD OUT, voltage to the coil is like 5v and when its CD IN it reads 12....not ~ 300 i was expecting. i can hear the high frequency switching of the transistors maybe the big storage cap is bad.
You won't see 300 volts across the coil on a multimeter... the 1.5 uF cap is charged to several hundred volts and "dumped" into the coil when the SCR fires. That pulse is very short and a meter can't respond to it. Now an oscilloscope will tell a different story.
Also, if your existing points/coil ignition is doing its job, there shouldn't be any dramatic difference at idle...