Resistor

[hippie1st]

Where do I find the correct resistor.(.3ohm)

 

[Bruce (VA)]

As I recall (and I do have CRS) you have a 6v 2N, correct? You are always better off by just ID'ing your tractor when you start a new thread.

You need a resistor & probably the terminal block as well for the 9N/2N. It's different from the 8N; mounting holes, I think. Part No: 12250B.

I have no idea why YT ID's the resistor as .5 ohms. Factory spec is .3 ohms cold to 1.7 ohms hot.

I do know Jist8N's has the correct resistor....YT probably does as well.
50 Tips

 

[hippie1st]

Thks Bruce.YT shows a .5 & .6 ohm.And yes this one is a 2N 6v.

 

[Dell (WA)]

hippy.......we understand you are electrically challenged, are you reading challenged too????
We've already explained to you what resistor is needed for the 6-volt 4-nipple squarecan ignition coil and why. Look at the PICTURE. (tip: it is NOT the 5-ohm resistor) It is the "infamous ballast resistor. ......respectfully Dell

 

[hippie1st]

Dell respectfully I can read.And I do know resitors and what they do.Did you read my Question? Where can I get one.This site has a .5&.6ohm
Thks Hippie

 

[NoNewParts]

(quoted from post at 11:37:54 10/14/11) Where do I find the correct resistor.(.3ohm)

type
2N resistor
on e bay, and you'll get a whole bunch of places

 

[McNugget]

I recall that some resistors have a better OEM look than others, so that might be the difference. Dennis Carpenter might even have one that "looks just like the original". Note that the .6 ohm value has a tolerance of +/-0.1 ohm where the .5 ohm has no tolerance given, and I suspect the two are essentially the same. For this application the tolerance can be wide. Somebody somewhere decided a resistor description should always contain a resistance value, which isn't a bad idea, but confuses the issue in this case. As Bruce pointed out, the resistance value is dynamic as the resistor heats (resistance increases with heat). This is a subtle trick to give the ignition system an extra boost while the starter drags the battery voltage down. (An aside: It actually is an advantage for the spark to hand crank your tractor.)

The "Clean, Bright, and Tight" is a tip to keep resistance low on all of the electrical joints. You only want resistance where it is needed. In this case it steps the voltage down to what the coil can handle when running.

 

[Dell (WA)]

hippie........I've already answered yer question. I've even showed you a picture of the MANDATORY "infamous ballast resistor". Iff'n it don't look like the picture, guess what??? It ain't the MANDATORY "infamous ballast resistor".

As explained before, the mandatory ballast resistor tests about 0.3-ohms COLD and about 1.7-ohms HOT. It averages about 1.1-ohms when running. Can you guess why you can only test the COLD resistance??? .........respectfully, Dell retired electronics calibration engineer

 

[hippie1st]

Dell.
This site list a resistor for the 2N.Looks like the Pic.But its rated at .5 (not.3ohms)is it that much diff.They were running this tractor with no resistor.Coil tar melted into dizy.Im not try to argue or be a smart A&ss.Jus looking for info.before I waist $$$.This Tractor is a freebee.Want to get it home.

 

[Dell (WA)]

Hippie........you've been told and you've been showed. What more do you want??? ALWAYS use the MANDATORY "infamous ballast resistor" with the either the original 6-volt or modern 12-volt squarecan ignition coil. Understand???

I don't know WHERE you are gittin' this miss-information about 0.5-ohm resistor. It is NOT the correct value for a 12-to-6V converting resistor (2.5-ohms) It is NOT correct value for the "infamous ballast resistor"........NO ARGUE!!!

I've been answering N-Tractor ignition problems since 1995. Don't try to snow me. I KNOW the N-Electrical systems; either the original 6-volt or the 12-volt conversions. In fact I know 8-ways to convert to 12-volts and they all work the first time. .........respectfully, Dell

 

[TheOldHokie]

(quoted from post at 19:57:55 10/14/11) Hippie........you've been told and you've been showed. What more do you want??? ALWAYS use the MANDATORY "infamous ballast resistor" with the either the original 6-volt or modern 12-volt squarecan ignition coil. Understand???

I don't know WHERE you are gittin' this miss-information about 0.5-ohm resistor. It is NOT the correct value for a 12-to-6V converting resistor (2.5-ohms) It is NOT correct value for the "infamous ballast resistor"........NO ARGUE!!!

I've been answering N-Tractor ignition problems since 1995. Don't try to snow me. I KNOW the N-Electrical systems; either the original 6-volt or the 12-volt conversions. In fact I know 8-ways to convert to 12-volts and they all work the first time. .........respectfully, Dell

Sheesh you are as hard headed as a mule. From the parts page on this website and as described by the hippie - the infamous ballast resistor. So can you actually help clear up his confusion now or would you just prefer to continue to rant without listening?

TOH

[size=18:a3a9f1d8a3]Resistor Assembly, Ignition Coil - For Models 9N, 2N. Resistor measures .5 ohms. (Part No: A8NN12250B)[/size:a3a9f1d8a3]

 

[Dell (WA)]

Hokie.......gitt off'n my back. I don't care WHAT Yesterdays Tractor labels the "infamous ballast resistor", the OFFICIAL specs of the "infamous ballast resistor is 0.3-ohms when COLD and 1.7-ohm when HOT. Usually runs about 1-ohm when running. You doubt??? do the math. Its OHMS LAW. Don't fergitt everytime the points OPEN, ittza chance to cool down. Ittza called "pulse modulation". Looker-up ........respectfully Dell

 

[TheOldHokie]

(quoted from post at 00:50:56 10/15/11) Hokie.......gitt off'n my back. I don't care WHAT Yesterdays Tractor labels the "infamous ballast resistor", the OFFICIAL specs of the "infamous ballast resistor is 0.3-ohms when COLD and 1.7-ohm when HOT. Usually runs about 1-ohm when running. You doubt??? do the math. Its OHMS LAW. Don't fergitt everytime the points OPEN, ittza chance to cool down. Ittza called "pulse modulation". Looker-up ........respectfully Dell

No I don't doubt Dell. I understand perfectly. But Hippie doesn't and all he/she wants is for someone more knowledable - specifically you - to confirm that part is the correct part for his/her application. And all you want to do is continue to pummel the poor guy/gal.

So let me:

Hippie - you may ignore the resistance YT lists for part number A8NN12250B - it is bogus. That is the part you need and has the proper temperature dependent range of resistance (.3 to 1.7 ohms) for your application.

Cordial and simple - ehhh.

TOH

 

[JMOR]

(quoted from post at 07:46:25 10/15/11)

(quoted from post at 00:50:56 10/15/11) Hokie.......gitt off'n my back. I don't care WHAT Yesterdays Tractor labels the "infamous ballast resistor", the OFFICIAL specs of the "infamous ballast resistor is 0.3-ohms when COLD and 1.7-ohm when HOT. Usually runs about 1-ohm when running. You doubt??? do the math. Its OHMS LAW. Don't fergitt everytime the points OPEN, ittza chance to cool down. Ittza called "pulse modulation". Looker-up ........respectfully Dell

No I don't doubt Dell. I understand perfectly. But Hippie doesn't and all he/she wants is for someone more knowledable - specifically you - to confirm that part is the correct part for his/her application. And all you want to do is continue to pummel the poor guy/gal.

So let me:

Hippie - you may ignore the resistance YT lists for part number A8NN12250B - it is bogus. That is the part you need and has the proper temperature dependent range of resistance (.3 to 1.7 ohms) for your application.

Cordial and simple - ehhh.

TOH

eah! And if someone measures on & doesn't like the number, just stick it in the refrigerator or on top of the pot belly stove & re-measure until he gets a satisfying number. 0.3, 0.5, 0.6......ain't gonna matter! As far as "officially specified", someone needs to point me to that publication (I officially doubt" its existence). But I have measured them at all temperatures/currents and posted the 0.3 to 1.7 many times (sometimes with temps) and expect that what we see is the repeating of those measurements.

 

[don b1]

You won't......the aftermarket resistors [9n12250] will measure in the .5 to .7 range.I doubt if a couple points diff will effect your spark.The A8NN12250B is the aftermarket part number for both the resistor and terminal block.The 9n12250 resistor is available at nnalert for 3.25. don b

 

[hippie1st]

Thks Don.Just came back from TSC.they dont list it.Did not know if +.2 ohms would effect anything.I cleaned up the contacts on the old one it may work.They had wired from switch to coil.Tar has melted into dizy.
Thks again for the help
Hippie