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17pw20 overvoltage
Turnip:
Hi Vic,
Admit - on having a problem, I would try another board - heaps of 'em at council tips, just mend tip chaps' stuff, and then all spares are free - Chris
PS - Some folks say this doesn't work, but chat to 'em a bit first - never fails.
ProDave:
A cheap and dirty way for a test perhaps is insert a couple of rectifier diodes in series with the inverter power. Will drop about 0.6V per diode.
That might get it running and you can see what the voltage on load settles as.
Turnip:
Hi Dave,
Could use a variac - plenty still at the local tip - or a couple of 100W tungsten lamps in parellel - (but getting rare now with green concerns) - Chris
ProDave:
--- Quote from: Turnip on October 30, 2011,11:49:45 ---Hi Dave,
Could use a variac - plenty still at the local tip - or a couple of 100W tungsten lamps in parellel - (but getting rare now with green concerns) - Chris
--- End quote ---
I doubt that wll drop the O/P volts, as most PSU's are now designed to work from 120 to 240V input.
vic_curtis:
Thanks guys, must admit trying another power board was probably next on my list, but hadn't thought of checking the tip.... I'll have to have a chat with the nice lady in charge down there. In the meantime I must admit it has become a bit of an interlectual challenge to solve the mystery. I like the idea of bunging a couple of
diodes in line with the 24v supply, might give that a shot. Don't have a variac, but an incandescant bulb in series, might just bring the voltage down a bit; especially if the regulation is not quite working correctly.
Will probably return to this when I've finished all the other jobs I'm supposed to be doing, as this just started out as a favour for a friend.
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