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Post by diviy on Apr 25, 2014 12:20:06 GMT
I have just had a Xcan headohone amp turn up (early birthday pressie off the mrs) connected the power supply to the amp and the power supply is making a noise like a fish tank pump I have turned it off straight away I have not connected to my system at all any advice and help please
Gerry
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jc
Fully Modded
Posts: 5,417
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Post by jc on Apr 25, 2014 13:57:02 GMT
Firstly, hello Gerry and welcome. That transformer doesn't sound very healthy! Are you able to measure its output (should be just a tad over 12v AC)? Another test would be an alternative 12v AC transformer (500ma min.), then you would know if the amp itself is OK. If only the trandformer is at fault then, I'm assuming an Ebay purchase, get a discount off the seller! You can get a better transformer (i.e 1000ma) from Maplin etc. for very litle cost. e.g. this oneObviously if the amp is faulty too, send the thing back to the dodgy seller for refund.
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Post by diviy on Apr 25, 2014 14:02:18 GMT
Thanks for the reply I will use my xlps v3 power supply and see if that works
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Post by diviy on Apr 25, 2014 14:08:20 GMT
scrap that idea different plug the xlps multimeter timer now
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Post by diviy on Apr 25, 2014 14:52:21 GMT
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Deleted
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Post by Deleted on Apr 25, 2014 23:49:02 GMT
It is normal for these AC plugpacks to read quite a bit higher without their normal load. However, the 3A plugpack will not drop as much with only a 500mA or less load, and I wouldn't advise that for long term use. If the X Can wasn't new, it may be faulty. You would need to advise the model number so that we can offer further advise as to what to check further. You will need a DMM to check the voltages and other measurements requested.
Alex
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Post by hodge on Apr 26, 2014 0:55:15 GMT
I think the high reading refers to the .5 amp wall wart that came with the xcan, altho it reads different.
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Deleted
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Post by Deleted on Apr 26, 2014 1:13:49 GMT
I think the high reading refers to the .5 amp wall wart that came with the xcan, altho it reads different. Yes, I took it as that. I have seen previous reports about higher than expected voltage out from transformers like this when not loaded, including those replacements from Maplin. My point here was that the new Maplin transformer is also likely to have a high unloaded output voltage, but being 3A rated is unlikely to drop to close to 12V AC with a 500mA (or less) load. It does seem possible that the HA has a fault, especially if it was purchased via ebay.
Alex
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Post by diviy on Apr 26, 2014 11:52:42 GMT
I got the maplin unit and the Xcan sound great but by using the maplin unit damage the xcan they can order me in a 1 amp unit if needed
Cheers Gerry
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Post by diviy on Apr 26, 2014 14:14:48 GMT
I have put a meter on the maplin unit and it gives a reading of 13.5 volts without load so am i right in assuming this is putting out a regulated voltage so it should not damage the xcan headphone amp ?
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Post by PinkFloyd on Apr 26, 2014 20:00:52 GMT
I have put a meter on the maplin unit and it gives a reading of 13.5 volts without load so am i right in assuming this is putting out a regulated voltage so it should not damage the xcan headphone amp ? 13.5v is absolutely perfect, no problems at all
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Post by diviy on Apr 26, 2014 21:22:23 GMT
YAY something gone right this week
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