Hi dR, My primary is 1.3 ohms so it appears mine has no resistor after all and they label them kind of back to front.
I think it looks like, "for use with a ballast resistor" means it doesn't already have one and "for use without a ballast resistor" seems to mean it already has one so no need to use an external one. Darnit ! 3 ohms is not a lot though must be only a 1.5 ohm resistor, I have to admitt I was fairly ignorant about these ballast resistors even though i've done a lot of working on cars, I just never took any notice.
Here is a link to the coil I have,
GT40R BOSCH IGNITION COIL BALLAST RESISTOR | eBay
OK I just found one with it written on the coil, " for use with external ballast resistor" The key word being external.
Lucas ignition coil DLJ-101 | eBay
EDIT: if I take postage into account I can get 2 Lucas coils for the same price as one Bosch GT40. Red paint must be more expensive than black paint.
I should have checked this out for my own benifit long ago, I appologise fully for not checking it out better sooner.
Cheers
I think it looks like, "for use with a ballast resistor" means it doesn't already have one and "for use without a ballast resistor" seems to mean it already has one so no need to use an external one. Darnit ! 3 ohms is not a lot though must be only a 1.5 ohm resistor, I have to admitt I was fairly ignorant about these ballast resistors even though i've done a lot of working on cars, I just never took any notice.
Here is a link to the coil I have,
GT40R BOSCH IGNITION COIL BALLAST RESISTOR | eBay
OK I just found one with it written on the coil, " for use with external ballast resistor" The key word being external.
Lucas ignition coil DLJ-101 | eBay
EDIT: if I take postage into account I can get 2 Lucas coils for the same price as one Bosch GT40. Red paint must be more expensive than black paint.
I should have checked this out for my own benifit long ago, I appologise fully for not checking it out better sooner.
Cheers
I'm having a lot of trouble getting it to do anything at all with a capacitor across the output. I've had to bypass the opto and still have a darlington pair driving it just to get anything at all. I just got to the point where I had a decent spark (decent for these coils so far) without the capacitor, and it was causing my speakers to produce a rumbling sound which I haven't experienced before, so I put the cap on, and back to a pathetic spark again. More like a tiny speck of plasma. Using 500mA-2A. But more input power doesn't necessarily produce a better output, if there's anything coming out at all.
So it could be of interest here
I think.
But what I mean is times the ammeter reading by the 12.4 volts of the battery to get it.
And it fluctuates a lot when tuning, its caused me to ruin quite a few LED's, one minute I have 20 volts out of the receiver then I tune a bit and when I look back there is 65 volts and the LED's are goin supanova with smoke coming from the resistor.
Which should i get for transmission cable ?
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