Ken,
If you're talking about the "stock" diode--the one in the little "can"
with red and black
leads, I've wondered about it myself. It's kinda big for just a
diode--I've wondered if there
isn't a resistor or capacitor in there as well (but I'm not curious
enough to destroy one to
find out).
There is a 0.7V drop across a diode, but that wouldn't explain the
difference in current
draw that you measured. A resistor or capacitor in there might explain
the difference.
Does the diode get warm when the diaphragm is cycling? If so, there is
probably a
resistor in there (but why?).
bs
KENNETH MASON wrote:
>Does anyone have info on the characteristics for the fuel pump diode? With
>the points held closed the coil draws about 3-amps. I also measured only
>about 0.5 amp with the diaphragm cycling and a 3-amp diode across the coil
>windings. I also notice that the diaphragm cycles much slower with the diode
>in place and if I remove the diode while it is running, the amperage draw
>rises to about 1.0 amps.
>Ken Mason
>BJ7 in work
>
>
>
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Bob Spidell San Jose, CA bspidell@comcast.net
'67 Austin-Healey 3000 '56 Austin-Healey 100M
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