Original poster: Jim Lux <jimlux@xxxxxxxxxxxxx> At 08:56 PM 2/12/2007, you wrote:
Original poster: "Jim Mora" <jmora@xxxxxxxxxxx> Hi Jim, The Accel CDI Coil has a "spec" 170:1 ratio. It certainly seems well designed. The entire outter body is a finned heat sink. The output tap has HV baffles. It didn't work well with my project as it has a very low impedance and is designed to work with MSD racing ignition modules. Check this ebay entry for a good picture and accel specs: 8074708769
That's a substantially higher turns ratio.. with 200V in, you'd be getting 34kV out. I wonder if the primary inductance and resistance are much lower than a standard coil. Back when transistor ignitions were first being made, there were a lot of designs that used non-standard coils so that they could more effectively use the power transistors of the day (i.e. those Germanium devices with 0.3 VceSat)
If you have the ability to measure the DC resistances of the primary and secondary, and/or the inductances, I'll be happy to put that data on my ignition coil datapage...
(I note that the mfr specs don't always mesh with the measured reality...)