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					Originally Posted by  Bob Carriere
					 
				 
				 
Question for Mike..... where is the "resistance" located in the screened ignition lead???? 
 
 
 
 
 
Stay tuned. 
			
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 The resistor is located where the clamp is , the clamp that holds the choke cable onto the shroud. The resistor is inside the screened spark plug lead . It's rare to find a chorehorse with the original screened ignition lead. 
These sets go for around $100 to 200 here. Depending on condition, they are often incomplete and in rough shape.
I've noticed: even when they don't have much compression they will still run ok. 
Electronics 101. The ammeter is a moving coil meter, able to be utilised as either a voltmeter or a ammeter. Often the ohms per volt or  FSD ( Full Scale Deflection ) of the meter is written or printed on the face  of the meter. You use a formula to work out the value of the external resistor , in parallel for measuring current and in series for measuring voltage. Using the formula you can fit a meter that has been calibrated to measure a certain parameter of either current or voltage.
This is a good read 
https://www.explainthatstuff.com/movingcoilmeters.html
Have you seen this ?  
https://www.vintageplanet.ca/Model-T...DqVGdTkhMYScYp
https://www.modeltford.com/item/5016...ShCRF9QlxU9bc9
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