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Old 21st July 2019, 05:17 PM   #4211
Pete2 is offline Pete2
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Thank you Jan ,
I think the cap in 105/205 position is a cheap electrolytic but I'll check your suggestion.
Probably I will start will pulling out 103/104 as I have not many parts around here , I'm going to Europe in a week , while there I'll buy some more .
Is getting bit late so I will try to check all this sometime during the week
Thank you
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Old 21st July 2019, 05:43 PM   #4212
jan.didden is offline jan.didden  Europe
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Where in Europe are you going to?

Jan
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Old 21st July 2019, 07:51 PM   #4213
Pete2 is offline Pete2
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Quote:
Originally Posted by jan.didden View Post
Where in Europe are you going to?

Jan
Few days in Ireland/Cork then Poland/Krakow and possibly Germany/Berlin(Wildau)
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Old 21st July 2019, 07:51 PM   #4214
sq225917 is offline sq225917  United Kingdom
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If your friend has used polymer caps in the shunt that will be the culprit, 25v 100if cap
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Old 21st July 2019, 07:52 PM   #4215
Pete2 is offline Pete2
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These caps are electrolytic , looks cheap
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Old 21st July 2019, 07:56 PM   #4216
jan.didden is offline jan.didden  Europe
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Nice trip. Have fun.

Jan
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Old 21st July 2019, 08:06 PM   #4217
Pete2 is offline Pete2
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big chunk is work related ,
I'll report back when I make some progress
thank you Jan
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Old 22nd July 2019, 08:35 PM   #4218
Pete2 is offline Pete2
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I managed to find different 10uF cap , left it running for an hour and best I can trigger is this :
Click the image to open in full size.
I'm using 60MHz probe and 100MHz scope , would be beneficial to get better probe -100MHz?
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Old 22nd July 2019, 08:44 PM   #4219
Pete2 is offline Pete2
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for the above div= 0.05us , 5mV
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Old 22nd July 2019, 09:00 PM   #4220
jan.didden is offline jan.didden  Europe
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This looks more like a measurement artifact to me. Some sweep trigger ringing. You probably see that too with everything shut off.

Jan
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