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The neihoff regulator regulates the field for a 28.2v output. The 12v tapped out of the middle of the windings is fed thru SCRs(switchable diodes). The regulator controls/fires the gates of the SCRs like a switching power supply and regulates that output to half the main output or 14.1v…. If...

When I say off line mine stopped generating any 12 or 24v power… yes the 12v is part of the overall 24v. The 12 is tapped off to the output thru the SCRs. Since you have the overall 24, the 12 windings are obviously OK. But the SCRs could be bad or the reg isn’t firing them. The fact that...

If your batteries are OK it shouldn't make a difference. I also cannot say for certain wether it would even work. I did something similar at one time to attempt to measure individual 12and24 loads. The alt would not stay online, and would only pulse, like it was looking for/needed the 12-24v...

An SCR is a switchable Diode. No trigger, nothing flows, trigger applied, current flows in one direction like a diode, so they rectify the 12v output, just like the diodes on the 24V output. The alt and batteries both connect to the battery terminal on the polarity box it doesn’t pass thru it...

The regulator monitors 24v and regulates the field to maintain that output. the 12and 24v windings(two 12v windings) are in series, and the 24V output from the stator passes thru diodes like any other alternator, The 12v output from the first stator windings pass thru SCRs. These SCRs are...