Charlize 2, no input caps, HISS

Code · 2nd February 2008, 08:59 PM

Having just bought a Charlize 2 (diyparadise.com) I'm experiencing a huge amount of HISS when the amp and the source are connected to the same mains ring.

At the moment I'm running a huge extension cord upstairs which is far from ideal!

Is a ground loop isolation transformer a potential solution?

Regards,
Ian

Code · 3rd February 2008, 03:18 PM

Maybe a picture will help

http://www.pix-hoster.com/img.php?id=2008_0f66

Lostcause · 3rd February 2008, 05:40 PM

Sorry code, the only way to stop it is to have completely isolated grounds, I put my source on a battery to achieve this.
Isolation transformer? no idea if it will work but I'm sure someone will be able to comment.

theAnonymous1 · 3rd February 2008, 05:49 PM

Or disconnect the mains ground from the two switching supplies. You should then connect the mains ground to the chassis for safety reasons, making sure the supplies/amps grounds are isolated from the chassis.

Code · 3rd February 2008, 06:09 PM

Quote:

Originally posted by theAnonymous1
Or disconnect the mains ground from the two switching supplies. You should then connect the mains ground to the chassis for safety reasons, making sure the supplies/amps grounds are isolated from the chassis.

Sorted! thank you! : )

2nd February 2008, 08:59 PM	#1
Code diyAudio Member Join Date: Jan 2006 Location: leeds, uk	Charlize 2, no input caps, HISS Having just bought a Charlize 2 (diyparadise.com) I'm experiencing a huge amount of HISS when the amp and the source are connected to the same mains ring. At the moment I'm running a huge extension cord upstairs which is far from ideal! Is a ground loop isolation transformer a potential solution? Regards, Ian

3rd February 2008, 05:49 PM	#4
theAnonymous1 diyAudio Member Join Date: Feb 2004 Location: Anonymityville	Or disconnect the mains ground from the two switching supplies. You should then connect the mains ground to the chassis for safety reasons, making sure the supplies/amps grounds are isolated from the chassis. __________________ "If you don't like funerals don't kick sand in Ninja's face." - Ninja

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3rd February 2008, 03:18 PM	#2
Code diyAudio Member Join Date: Jan 2006 Location: leeds, uk	Maybe a picture will help http://www.pix-hoster.com/img.php?id=2008_0f66

3rd February 2008, 05:40 PM	#3
Lostcause diyAudio Member Join Date: Aug 2005 Location: NW UK	Sorry code, the only way to stop it is to have completely isolated grounds, I put my source on a battery to achieve this. Isolation transformer? no idea if it will work but I'm sure someone will be able to comment.

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