I have a 1950 Chevy 3100 1/2 tone truck, with a 216 c.i. in-line 6 and a 6 volt electrical system. Externally mounted on the outside of the coil is what looks like a condensor/resistor. I managed to break the wire and am looking to replace it. From what I could find on the Internet, it appears to be a discharge resistor. On the end of the resistor it has a "D-R", a number "1910147" and the marking "3mf". I found some other Internet info that refers to it (or something else?) as a ballast resistor. My understanding is that it supports the coil at start-up and low rpm's. Anyway.... wonder where I can get one?
I thought those things were filter capacitors for the tube radio... Maybe modernize, rather than replace. Get a 6 volt coil with an internal ballast, or a 6 volt coil and a matching ballast that you can mount to the firewall. Then throw the old **** away.
you don't need a ballast resistor on a 6 volt system (unless it's a flathead with the coil mounted on a pancake distributor). Ballast resisters are used on 12 volt systems. the condenser was a noise supression cap for a radio, as mentioned earlier.
This is a condenser for radio noise suppression. The D-R stands for Delco Remy and the 3MF is for 3 microfarad, which is the value of the condenser (or capacitor). Don't need it if you don't have radio, but if you do better put one back on.
my 1940 flathead 6 volt will not ! run good with a ballist resistor does anybody know if it will burn the points or coil up if i don't use one
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