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Harry Ferguson Tractors Discussion Forum
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Re: electronic ignition

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Armand

09-10-2015 13:33:19




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soundguy

09-10-2015 18:31:37




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 Re: electronic ignition in reply to Armand, 09-10-2015 13:33:19  
No reply?



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Armand

09-11-2015 10:00:58




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 Re: electronic ignition in reply to soundguy, 09-10-2015 18:31:37  

soundguy said: (quoted from post at 22:31:37 09/10/15) No reply?
I did reply look at the previous message. To add to the above..... I used a digital multi meter on the 200 scale ( not the 200K) and thats what it read. It is not a top of the line meter so maybe thats the problem. I will check it again with another meter I have, It is a techmaster digital multimeter. It should be good it cost me $160 a while back.

I am not a master electrician by no means just a hobbyist so let me ask a question... If I put the meter on infinity and check the ohms on the leads if it doesnt read zero should I subtract that from the resistance I get on the coil. The techmaster reads zero, but I didnt check the meter I used on the coil but I will. Thanks
This post was edited by Armand at 10:09:04 09/11/15.

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soundguy

09-11-2015 11:40:23




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 Re: electronic ignition in reply to Armand, 09-11-2015 10:00:58  
A meter that wont zero or has to trim zero is junk.

Even if it does zero, that I no guarantee of accuracy.

Ohm meters are very poor at measuring single digit low ohms.

I saw no reply to my post asking what coil you really have. The number you supplied is not a nape coil number, which is why I asked again.

5.9 ohm primary is highly unlikely...



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Armand

09-11-2015 18:08:43




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 Re: electronic ignition in reply to soundguy, 09-11-2015 11:40:23  
I took a reading with a better meter and I got 4.59 for resistance. The meter is a techMaster True RMS digital multimeter. I am also including a picture of the coil. I googled Napa 905 and some results were for a Napa 905 coil, but the posts are from 2005 and not much info. I gonna guess its an outdated model and from what I read I think it had 1C14SB as the part number. Not sure about that. I searched Napa and that part number does not come up. third party image

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soundguy

09-12-2015 08:23:48




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 Re: electronic ignition in reply to Armand, 09-11-2015 18:08:43  
Ic14sb has a primary resistance around 3.25ohms.

Very, very common coil .

Matters little if your meter cost 12$ or 120$, low ohms are usually not read correctly.



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Armand

09-13-2015 11:46:53




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 Re: electronic ignition in reply to soundguy, 09-12-2015 08:23:48  
thanks for the info guys. you learn something new everyday



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soundguy

09-13-2015 16:58:02




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 Re: electronic ignition in reply to Armand, 09-13-2015 11:46:53  
At the price for an ic14sb (16-20$) hard to beat that coil



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Armand

09-16-2015 14:20:11




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 Re: electronic ignition in reply to soundguy, 09-13-2015 16:58:02  
Can't believe its that inexpensive.. Maybe I should pick one up for the future.....



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Armand

09-11-2015 18:08:43




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 Re: electronic ignition in reply to soundguy, 09-11-2015 11:40:23  
I took a reading with a better meter and I got 4.59 for resistance. The meter is a techMaster True RMS digital multimeter. I am also including a picture of the coil. I googled Napa 905 and some results were for a Napa 905 coil, but the posts are from 2005 and not much info. I gonna guess its an outdated model and from what I read I think it had 1C14SB as the part number. Not sure about that. I searched Napa and that part number does not come up. third party image

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