Massive WTF !
Printed From: Speakerplans.com
Category: General
Forum Name: Electro Frying Forum
Forum Description: Talk about drivers, processors and mixers
URL: https://forum.speakerplans.com/forum_posts.asp?TID=58698
Printed Date: 26 March 2026 at 9:25pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: Massive WTF !
Posted By: infrasound
Subject: Massive WTF !
Date Posted: 31 October 2011 at 12:46am
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Right, here's one for you guys to try and work out what the hell is going on here. My (new) small SMPS that I use for active monitor duties is playing up. Bigtime. It's output voltage is around 50% higher than it should be, at 75vDC instead of 50vDC. The adjustment allows ±20v rail swing, from 55vDC to 95vDC (!) - instead of 30v-70v. First thing that occurred to me was that it was buggered. Metered the mains input on the PSU and it came to 330vAC. What the hell I think, how is everything not fried in this room! I go and test the socket, and its 242vAC. The mains input on the PSU- 340vAC and climbing?? WTF.
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Replies:
Posted By: infrasound
Date Posted: 31 October 2011 at 12:47am
| Update: Now on 365vAC and climbing, expecting something to give soon! |
Posted By: infrasound
Date Posted: 31 October 2011 at 12:52am
Definitely just discovered free energy 
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Posted By: haloweenhamster
Date Posted: 31 October 2011 at 6:34am
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Sounds like a switch mode to me all switch mode supplys I have scoped input or output to ground fluctuates from 300-380vac at 400-500khz ------------- 2x court top horn 2" + 1" loaded 2x court mid horn 12" loaded 2x ass mt1200 10" + 2" + bullets 2x court W bins 15" loaded 1x/3x TAS sub 18" loaded |
Posted By: tomschute
Date Posted: 31 October 2011 at 7:55am
was gonna say wouldn't be advertising this - the coats will be round soon! ------------- Out to lunch... stableaudio@hotmail.co.uk www.stableaudio.co.uk Speaker Building Services |
infrasound wrote: