Tecate CDI Recreation - For Sale

[RubberSalt]

[RubberSalt]

I've got a good deal of the schematic together. Im almost at a stand still. I've been trying to find a replacement part for the p115 transistor. The other part slowing me down is the zener diode. The one i have on it broke in half while disassembly.

Ive found specs for a p115 thyristor. It didn't contain pictures andi think its for a different part number.

I may build a prototype on my breadboard and try a bt151-500r scr in its place. Its a lot bigger, but if it works..

[big specht]

A lot of that sounded like charle Browns teacher wah,wah,Wah,wah. But keep up the good work it sounds like you are getting somewhere

[RubberSalt]

I just placed an order for all the caps and some parts to test out as replacements for the p115 SCR.
3-7 days until the parts are at my door

Looking for Diodes. 1N4007 are the recommended, 1k volts at 1amp... But stock is a part number I cant find. It's much bigger than my 1n4007 diodes. hmmm.. Dang old part numbers!

[SUPERBEAST]

have you looked on digikey?

[RubberSalt]

No dice with digikey, on the p115.

[wonderboy]

Hey RubberSalt,

How about this:

There are some pictures in this datasheet. No idea if you can still locate this part, but I think you can get the specs from the attachment. Let me know if this is it (just curious).

EDIT: ok, so I looked more closely at the pics and I don't think this is the same part... but that seems weird because functionally, it seems like this is the right thing. Hmmm...

[RubberSalt]

I came across that to. The specs are really high for the amperage. Its a lot bigger too.

I ordered some transistors equivalent to the for2b used in the kx cdi. My theory is that these are similar parts. They are only 5 years apart.

[RubberSalt]

Things have finally slowed down enough that I could get back to staring at this thing for an hour. I've got most of the schematic done, now just to input values. There's another CDI in the mail that has been donated for R&D. Anyways, heres what I have so far.

For any electrical engineers, this makes sense to me at least! lol

[RubberSalt]

A couple of mistakes of the first drawing have been made, Resistance values updated.


I did notice that the R4 (Color code looked like 47 ohms) resistor measured 28 on my meter. Either I've got a bad meter(which I tested to a known good 47 and it passed), I read the color wrong, or it was bad.
I still have the first CDI, and I never pulled that resistor. I just measured it at 29... I think I read the color wrong. R4 should be something like 28 ohms?

[RubberSalt]

Tonight I'm going to assemble a set up on my breadboard. I'll be sure to get a video of it running off it :-p

Gives me ideas. Maybe I could build a cdi that also has a separate circuit for voltage regulator/DC rectifier?

[RubberSalt]

I just need to add some ends to it and the test it out

[RubberSalt]

I wanted to say thanks to Maico. He's provided another 21119-1074 CDI for R&D.

From my schematic, I can get readings without pulling it completely apart. For example, the 1UF capacitor is between the G/W and the Black/W wires.

I'm receiving a 2.2uF reading on it. I received this for a moment on the other, but assumed it was a mistake on my meter. I believe another change may need to be made to the schematic.

[RubberSalt]

No spark Time to review the schematic.

[Maico]

No spark Time to review the schematic.

Oh ohooo. No sparky. No sparky not good.