Hey guys,

I received my new CH ignition "kit" today. It is just the circuit board, and the sensor & magnet. It didn't come with any directions specific to the kit version, only the regular generic instructions for their completed unit. It came with a picture/diagram of the circuit board itself, and some cryptic notes, but no wiring diagram. Can anybody help me with a diagram or instructions!!????? I'm all excited and don't want to wait till Monday to call them!!

From the appearances of the nearly worthless diagram I got, the red/white/black wire set goes to the sensor. Then apparently the red and black wire set go to the battery. Where the hell does the coil hook up?? It almost appears as though the coil gets hooked up to the same wires as the battery. That can't be right, can it??

Please help!

AV8TOR

I figured it out! I downloaded the troubleshooting section, and the diagram from the website. Then I sat down and dusted off my foggy memories of electronics, and traced out the circuit board. Here's the deal:

It appears from the diagram that they sent that the coil gets hooked in with the battery wires. This diagram was kind of funky, and had some hand scribbled notes on it. The circuit board has two sets of wire coming out of it; a set of three with a white wire, and a set of two with only black and white. This, and the vagueness of the drawing make it seem like you hook the coil into one of these sets of wires. NO, not so. You have to solder another set of wires into the circuit board to go to the coil. These wires go on either side of the big capacitor. The one near the outside edge of the board goes to the negative side of the coil, and the one on the other side of the capacitor that is inboard of the edge goes to the positive. Of the wires that come preinstalled, the three wire set goes to the sensor, and the two wire set goes to the battery.

Anyway, got it all hooked up and it works great. If you see this Zagnut, you were correct; my original coil that was on the engine seems to work fine with this system. Thanks!

Hope this helps if anyone else runs across this problem.

Take care,
AV8TOR

here's something else to consider:
since you need to shield the coil and ign circuit you can save a little weight by wraping everything in alum foil. wrap everything in thin foam and tape first to protect against shorts and make a good connection between the foil and the braided sheild on the ht lead.

man, i wish i had more time to work on planes/engines-i barely have time for this forum anymore.

dave

Thanks Zagnut, I was thinking that might work.

Another idea. These probably aren't available anymore due to the lead problem, but my mother used to have plastic bags that were laminated with a super thin (spray?) of lead. These were used for storing/protecting film when it was passed through the x-ray machines at the airport. I think I still have one of those laying around to try... The shielding systems they sell for ultralight airplanes have a lead lined box, but they would be very heavy for our uses.

Also, it seems like a lot of people are running just a normal ignition wire and a resistor plug. Do I need to get shielding for the plug wire?

Thanks again,
AV8TOR

i've always used a shielded lead and plug cap, even with magnetos. just strip some coax cable for the shield. maybe it's just a peace of mind thing but i like it.

have you run the engine yet?

dave

Hi,

Nope, haven't run it quite yet. I'm waiting on my brother-in-law in the states to send me a collar for mounting the magnet. I drew him up a shop drawing, and he's going to make it on his lathe this weekend and send it to me in the mail Monday. I'm doing everything with hand tools, as I only have a minimal shop set up here in Mexico. How I wish for all my power tools, torch, welder, etc. up at my place in the states!!

Just now finished the sensor mount, came out really nice. The sensor and collar with magnet are all going to be behind the motor in the little "bell housing" area. This is going to be a really neat setup. My new digital fish scales showed up, and my GloBee digital tach, so hopefully by next weekend I'll have some numbers for you guys!

Thanks for all the help.

AV8TOR