Transformer specs for capacitive discharge ignition

[phl]

Can you help me in choosing either iron core or ferrite?
Size, characterisics? frequency of operation: in the litterature I
found from 100Hz to 10kHz! Thanks for help or comments

 

[Watson A.Name - \"Watt Su]

"phl" <philippe.loutrel@laposte.net> wrote in message
news:5d56ddf.0501070554.5aaae396@posting.google.com...

Can you help me in choosing either iron core or ferrite?
Size, characterisics? frequency of operation: in the litterature I
found from 100Hz to 10kHz! Thanks for help or comments

The CDIs work at relatively slow speeds; 3600 RPM is 60 pulses per
second. An old trick for calibrating Tachs wa to feed it 60 Hz and set
it for 3600 RPM. So the max that CDIs do is only a few hundred Hz. As
long as the capacitor charges up between each pulse, it will work okay.
I had a Delta Mark 10, and it used a pair of germanium transistors and a
toroid for the inverter. It had an annoying squeal when the hood was
open, but that's not the usual, so it worked well.