Standard Coil Rating

mike gilbert · Mar 28th, 2024, 15:27

Does anyone know what the Ohms rating is for the standard coil with armoured cable, as fitted to the Amazons and 1800 series up to '69?
I'm ordering an electronic ignition kit that needs a coil resistance of 1.5-3.0 Ohms. Thanks.

Derek UK · Mar 29th, 2024, 13:51

3 OHMS is normal. Don't use a 1.5 OHM coil as it will overheat.

mike gilbert · Mar 29th, 2024, 20:32

[QUOTE Don't use a 1.5 OHM coil as it will overheat.[/QUOTE]

That's why I'd like to know the Ohm's rating for my original equipment coil Derek, I can't find the information online and I can't test the resistance as I cant get to the positive output because it's hidden inside the armoured cable.

Rustinmotion · Mar 29th, 2024, 20:42

Quote:

Originally Posted by mike gilbert

[QUOTE Don't use a 1.5 OHM coil as it will overheat.

That's why I'd like to know the Ohm's rating for my original equipment coil Derek, I can't find the information online and I can't test the resistance as I cant get to the positive output because it's hidden inside the armoured cable.[/QUOTE]

I have a working coil with the cable cut and I have a multi meter all I’m missing is the brains to know what to do, if you tell me how to check it il do it this weekend

Drembo · Mar 30th, 2024, 00:33

measure the resistance between the lead going to the ignition switch and the lead going to the distributor.

Rustinmotion · Mar 31st, 2024, 10:51

Quote:

Originally Posted by Drembo

measure the resistance between the lead going to the ignition switch and the lead going to the distributor.

Measured my old working coil and it’s showing 1.5 with the selected range 200 on the meter

gjr0 · Mar 31st, 2024, 11:54

Six volt coil are typically 1.5-1.7 ohms. Twelve volt are twice that, 3-3.4 ohms.

mike gilbert · Mar 31st, 2024, 14:25

Quote:

Originally Posted by Rustinmotion

Measured my old working coil and it’s showing 1.5 with the selected range 200 on the meter

Thanks - is that one of the old armoured cable type?

mike gilbert · Mar 31st, 2024, 14:26

Quote:

Originally Posted by Drembo

measure the resistance between the lead going to the ignition switch and the lead going to the distributor.

That is impossible with these coils - hence my question

Rustinmotion · Mar 31st, 2024, 15:55

Quote:

Originally Posted by mike gilbert

That is impossible with these coils - hence my question

It’s the old 12v coil with the positive fed from the bottom, that’s the reading I got and the coil was working before I removed it
Have to say if I was going to the trouble of fitting electronic ignition I’d go for a new high output coil as well, if you use a bulkhead fitting and a black coil it’s not far from the look of the original

Mar 28th, 2024, 15:27	#1
mike gilbert Master Member Last Online: Apr 25th, 2024 15:14 Join Date: Dec 2003 Location: Peterborough View Photos By: mike gilbert	Standard Coil Rating Does anyone know what the Ohms rating is for the standard coil with armoured cable, as fitted to the Amazons and 1800 series up to '69? I'm ordering an electronic ignition kit that needs a coil resistance of 1.5-3.0 Ohms. Thanks. Last edited by mike gilbert; Mar 28th, 2024 at 17:36.

Mar 29th, 2024, 13:51	#2
Derek UK VOC Member Last Online: Yesterday 14:29 Join Date: Jul 2006 Location: Chatham	3 OHMS is normal. Don't use a 1.5 OHM coil as it will overheat.

Mar 29th, 2024, 20:32	#3
mike gilbert Master Member Last Online: Apr 25th, 2024 15:14 Join Date: Dec 2003 Location: Peterborough View Photos By: mike gilbert	[QUOTE Don't use a 1.5 OHM coil as it will overheat.[/QUOTE] That's why I'd like to know the Ohm's rating for my original equipment coil Derek, I can't find the information online and I can't test the resistance as I cant get to the positive output because it's hidden inside the armoured cable.

Mar 30th, 2024, 00:33	#5
Drembo New Member Last Online: Today 14:35 Join Date: Oct 2023 Location: mountain ranch	measure the resistance between the lead going to the ignition switch and the lead going to the distributor.

Mar 31st, 2024, 11:54	#7
gjr0 Junior Member Last Online: Apr 23rd, 2024 23:48 Join Date: Aug 2023 Location: Delano, Minnesota USA	Six volt coil are typically 1.5-1.7 ohms. Twelve volt are twice that, 3-3.4 ohms.

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