[dhollister]

Hi,

Sorry if this is a question from the unwashed masses.  I'm a software guy, not a hardware guy

The enclosure I am using for my bugle + PS is just too small, and there is too much EMI which causes a nasty buzz at respectable listening levels (it's a +60dB config).  I am investigating using a different chassis.  I found one that I think I can use, and it even has a power supply.  It comes from an old SCSI hard drive enclosure.  The power supply provides +12V and +5V.  I would expect the +12V connection would work just fine.

My ignorance comes into play with regard to the amperage.  The power supply says it provides 1.8 amps on the +12V connection.  I know the bugle PS says it does up to about 100mA.  Is this an issue?  I have no idea if I would fry the board by using the power supply in this chassis.

Any input would be greatly appreciated.

Thanks,
David

[PatOMalley]

my understanding is that the Bugle has inherent noise and that going up to 60dB increases that noise.
mine is set to 50dB and is ok until you really get to an unlistenable level so that passes for me.
40dB with a SUT would probably be ideal. I just wanted to be able to use a medium output straight thru, and enough gain to to overcome loading a low output cartridge.

[dhollister]

my understanding is that the Bugle has inherent noise and that going up to 60dB increases that noise.
mine is set to 50dB...

Yep, that I understand.  My cart, though, is a LOMC, so I need the gain.

Cheers,
David

[hagtech]

You need two supplies, one for +12V, the other for -12V.

As for the buzz, this is typically caused by not grounding the chassis to board.  Or connecting it in too many places.

jh

[PatOMalley]

Yep, that I understand.  My cart, though, is a LOMC, so I need the gain.

Cheers,
David
[/quote]

You can drop the gain and use a step up transformer.
I have the Denon AU300LC but the Cinemag's are worth looking at: http://www.audioasylum.com/cgi/m.pl?forum=vinyl&n=550720&review=1

[dhollister]

You need two supplies, one for +12V, the other for -12V.

As for the buzz, this is typically caused by not grounding the chassis to board.  Or connecting it in too many places.

jh

So, it took me a while, but I finally finished gutting that SCSI drive enclosure and putting my bugle+PS in it.   Lo and behold, the hum is almost entirely gone.  I had to push the volume up higher than I would ever listen in order to hear it, and even then, the inherent hiss was still noisier than the hum.  Woo-hoo!  Or should I say, Ho Ho Ho!

Happy holidays everybody,

-D