Schematic does make more sense but the outer brush line (Yellow) is connected to ground in the schematic and continues through a diode to ground. This makes Anode and Cathode of one diode both going to ground. I figure that is a boo boo. The diodes conduct on alternate half cycles. The picture shows things pretty clear.
Doesn't seem the case here but sometimes a diode designation (part #) will be followed by a R and the R designates the the diode is reversed with the anode and cathode as to which is the stud. This is frequently seen when the enamel inset at the center terminal is a different color. Like one is yellow and one is blue for example. The same part number is shown for both and the drawing makes sense less that ground lead I mentioned.
I am curios what will fix this thing.
Ron
I vote for the capacitor going bad. BTW I think you drew the diode backwards, the way they are drawn it would clamp the field at .6v
I'll tell you and the other guys following this thread - this has been a good time.
One thing is for certain. I'll pull the information that I learned from this and create a test manual with field voltages and all that stuff. I may not be any smarter than I was but I'm certainly better informed!
I guess there's a football game on tonight? Being in Indiana I guess I should watch it. Or I can do something else and I'll hear about it tomorrow.
Well if removing one diode at a time and the output drops 1/2, then your diodes and field have to be ok.
And it runs at 90% without the cap, so I think you have a new cap that maybe breaking down or something. I'd try another different manufacturer cap.
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