[Amps] Acoustic Noise Comparison

[Jim W7RY]

Felt works great for soundproofing.  Remember the thick felt typewriter 
pads? A square under each foot does wonders to keep the sound from 
transferring to your desk/operating table.

73
Jim W7RY


-----Original Message----- 
From: Jerry Kaidor
Sent: Friday, June 22, 2012 9:36 PM
To: amps at contesting.com
Subject: Re: [Amps] Acoustic Noise Comparison

Hi,

   I found a spare moment today and couldn't resist.  I popped open the
hood of the Alpha and cut three squares of the "Dynamat Extreme" that I had
left over from my car soundproofing project.  I stuck one square on the L/H
side of the cover, next to ( but not over ) the RF deck.  The second square
went above the power transformer.  The third square on the R/H side of the
cover.

   I also cut up a soft rubber mouse pad and put pieces under the amp,
where the (missing) rear feet were supposed to be, and also under the
(stiff, plastic ) front feet.

   Buttoned it back up, plugged it in, powered it up.  The amp was MUCH
QUIETER.  According to the sound meter, about 8 or 9 db quieter.  Just
as quiet as the 30L-1 in fact.

                              - Jerry Kaidor


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