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Author Topic: 230V Snubber  (Read 745 times)

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Offline Simonv92Topic starter

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230V Snubber
« on: April 09, 2020, 05:36:15 pm »
Hi All!
I have a Weller PUD81 solder station, everytime I switch it off I can hear a powerful "bump" in my pc speakers. To solve that problem I want to put in parallel to the Weller switch a snubber.
I need some help about R and C values. The Transformer inside is 95W.
Thanks all!
Simone
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Offline Vovk_Z

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Re: 230V Snubber
« Reply #1 on: April 09, 2020, 08:36:37 pm »
I can't say exact values but you can start with 470 R (1-2 W) and 0.047-0.1 uF X2-type cap.
I think loud bump mean bad design of your PC speaker power supply too.
« Last Edit: April 09, 2020, 08:40:35 pm by Vovk_Z »
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Offline Simonv92Topic starter

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Re: 230V Snubber
« Reply #2 on: April 09, 2020, 11:27:41 pm »
Thank you for your reply, I’ll do some test... the speaker psu is a toroidal transformer with a rectifier bridge and some capacitor... I don’t have an EMI filter on the AC line, maybe this can be the problem...
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Offline trobbins

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Re: 230V Snubber
« Reply #3 on: April 09, 2020, 11:52:33 pm »
Try using a different AC mains socket for the soldering iron.
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