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<DIV><FONT size=2>The ammeter indicates the amount of current flowing. If
the cars electrics and battery are taking more than the dynamo can provide, then
the ammeter will be showing a discharge. If the engine revs are increased
and this results in an increase in output from the dynamo, then the ammeter will
indicate less of a discharge, and may move to show a charge. Similarly
if more things are switched on, then if a charge was being indicated
before, that may reduce or it may become a discharge. It all depends on
how much current the cars electrics and battery are taking, compared
with the dynamo output at the time.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Without the engine running i.e. no output from the dynamo
switching anything - lights or ignition - on should show a
discharge.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>One needs to repolarise the dynamo after switch polarity
or it will not charge. If the polarity was switched between
connecting the ammeter one way, then the other, and wasn't repolarised in
between, then that would explain why the ammeter moved in the same direction
both times. </FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>But if the ammeter connections were reversed independently of
switching the polarity, as seems likely, then there is some other reason
why it indicates in the same direction as before reversing the
connections. Like the connections weren't actually reversed, of it was
charging before but isn't now. If the engine wasn't even run, just
turned on ignition or lights, then the connections weren't actually
reversed.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>PaulH.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2></FONT> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV> When engine revs increase, does the ammeter needle move
farther?</DIV></BLOCKQUOTE></BODY></HTML>