On 10/04/2014, 4:36 AM, Phil Allison wrote:
Phil Allison wrote:

ever since someone had the brain wave of putting "computer" fans inside power amps - service techs have had to deal with dust and fluff clogged heat sinks and filthy PCBs.

When such amps are installed in a music venue for years, cigarette smoke, artificial fog oil and moisture add to the mix making the result truly appalling.


** Some pics for you:


1. QSC USA1300, after many years operating in a venue:

http://s10.postimg.org/6e3lpj3ft/qsc1.jpg

....

This amp would be a sitting duck for the PCB "tracking" problem.



.... Phil



I'd want a HazMat suit for working on the that one...

John :-#(#


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