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@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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