Try it with a 12V trafo through a resistor of say 100 ohms first to see if the caps are connected correctly. If not, you will see a very large current resulting in low voltage at the caps. Can you measure voltage? And oh, btw, you didn't mention the rectifiers, but you have those too?
Jan Didden.
Jan Didden.
okay i did this test using a 9v batt instead i connected my multimeter in serie whit the batt. to measure the current
when i connect it to the cap the same this happens no matter if its + or - it draw a large amount of current the first few seconds, then drop to zero. seems normal..
i also try to measure the voltage over the cap after its been charged. its drop for 9 volt slowly. the same speed + and -
when i connect it to the cap the same this happens no matter if its + or - it draw a large amount of current the first few seconds, then drop to zero. seems normal..
i also try to measure the voltage over the cap after its been charged. its drop for 9 volt slowly. the same speed + and -
Calebay said:okay i did this test using a 9v batt instead i connected my multimeter in serie whit the batt. to measure the current
when i connect it to the cap the same this happens no matter if its + or - it draw a large amount of current the first few seconds, then drop to zero. seems normal..
i also try to measure the voltage over the cap after its been charged. its drop for 9 volt slowly. the same speed + and -
Yeah well I think 9V is a little too low. Try, if necessary, with your big transformer but with a series resistor. I would also vote for the black terminal being neg pole, btw. It seems pretty standard.
Jan Didden
Netlist said:Somewhere on the board there's a clever post how to measure polarity with a scope, looking at dropping waveforms. I can't however remember who posted it, when and where.
/Hugo![]()
http://www.diyaudio.com/forums/showthread.php?s=&threadid=35471&highlight=
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