Lestronic Charger Question

[JohnnieB]

What was the secondary voltage with it attached?
Comparing it to what you get with the 3µF and good 6µF might give you a ballpark guesstimate.
Then try the Capacitor functions on whatever meter(s) you have.

[JohnnieB]

You can connect a resistor and the capacitor in series and apply AC to it to determine Xc (Capacitive reactance). Volts divided by Amps equals Xc.
Then multiply Xc by 376.9911 the divide that number into 1 to get Farads.

I'd use a step-down transformer to get the 60Hz AC voltage.

[simple man]

Originally Posted by JohnnieB

What was the secondary voltage with it attached?
Comparing it to what you get with the 3µF and good 6µF might give you a ballpark guesstimate.
Then try the Capacitor functions on whatever meter(s) you have.

I have no capacitance measurement. (old Fluke 77)

Originally Posted by JohnnieB

You can connect a resistor and the capacitor in series and apply AC to it to determine Xc (Capacitive reactance). Volts divided by Amps equals Xc.
Then multiply Xc by 376.9911 the divide that number into 1 to get Farads.

I'd use a step-down transformer to get the 60Hz AC voltage.

Ok! I have a bell transformer that is 24VAC. I also have several ballast resistors for automotive ignition coils. They are low Ω, though. I'll start experimenting!

[yurtle]

Originally Posted by simple man

I have no capacitance measurement. (old Fluke 77)

Fluke 77 is one of my three DMMs. It's bullet-proof, unless you hook it up to over a thousand volts, then it's only a couple of bucks to buy the "high dollar" precision resistor.

[simple man]

Originally Posted by yurtle

Fluke 77 is one of my three DMMs. It's bullet-proof, unless you hook it up to over a thousand volts, then it's only a couple of bucks to buy the "high dollar" precision resistor.

It works fine, just has no cap test. I've heard that even dedicated cap testers aren't really that accurate. As for using it on anything even near 1,000V - - - - - NOT! I got zapped by having my hand too near the distributor cap on my truck when it was running! That's a helluva way to find out the wires needed to be replaced!