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Re: [TenTec] how to quiet fan noise on 425 amp

To: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Subject: Re: [TenTec] how to quiet fan noise on 425 amp
From: Ken Brown <ken.d.brown@hawaiiantel.net>
Reply-to: ken.d.brown@hawaiiantel.net,Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Mon, 24 Dec 2007 12:22:23 -1000
List-post: <mailto:tentec@contesting.com>
My Titan 425 sits on some packaging foam sheets. The foam is between the 
front supporting bail and the desk top, and also between the rear fee 
and the desk top. That makes a huge reduction in the vibration 
transferred into the desk, and overall less noise in the shack. Someday 
I'll replace the grommets that are supposed to isolate the vibration 
from the chassis. If those grommets are as hard as the ones I removed 
from the vacuum relay mounting, new ones will make an improvement. I 
wonder if there is a way to get the squirrel cage precision balanced? It 
seems like the noise is mostly from vibration due to imbalance, and the 
air flow noise is not the problem.

> Are there any proven approaches to quieting down the fan noise on the
> TT 425 Titan amp?  Slow speed is tolerable (but not great), but High speed
> just causes lots of "rattling" noise.

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