Re: battery disconect switch in brass
It seems that without exception ALL of the green or black knob varieties that fit on the battery terminal are brass plated pot metal (Mazak). They offer a high resistance when in use. Furthermore they are designed to fit on the negative terminal only.
To overcome this problem I made one from solid brass. It works well. I made the tapered hole for the positive terminal using a Snap-On battery taper terminal restorer.
Pics to follow
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