OT: hissing from a hub

From: Vintage Computer Festival <vcf_at_siconic.com>
Date: Sun Nov 23 15:35:52 2003

I've got this 3Com OfficeConnect Dual Speed Hub 8 that is putting out this
obnoxious hissing noise. It's loud enough to be annoying and add
significantly to the white noise in my office. It sounds like the air is
slowly being let out of a tire...forever. I've opened it up and found a
capacitor with some brownish crusty stuff caked on the top of it. It also
was bulged ever so slight at the top, as was another one right by it.
Both are within proximity of the power connector. I didn't see any
blackened spots on the enclosure indiciating that either had let out any
magic smoke.

So the question is, what is the most likely cause for this hissing? I've
had a device before where the capacitor was causing the hiss (or at least
I was pretty sure). There doesn't seem to be anything else in there that
would cause the hissing (a bunch of ICs, a couple couls, a couple power
transistors, etc.)

Any help appreciated.

-- 
Sellam Ismail                                        Vintage Computer Festival
------------------------------------------------------------------------------
International Man of Intrigue and Danger                http://www.vintage.org
[ Old computing resources for business || Buy/Sell/Trade Vintage Computers   ]
[ and academia at www.VintageTech.com  || at http://marketplace.vintage.org  ]
Received on Sun Nov 23 2003 - 15:35:52 GMT

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:36:20 BST