[Elecraft] KAT100 ATU and floor tile

Wed Jan 29 18:47:02 2003

For many years, high-end speaker enclosures for "hi-fi" applications
were often constructed as double boxes with sand in between to deaden
the cabinet and prevent or minimize vibration. Some enclosures were
even made of cast concrete!

73/72, George
Amateur Radio W5YR -  the Yellow Rose of Texas
In the 57th year and it just keeps getting better!
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
K2 #489  IC-765 #2349 IC-756 PRO  #2121 IC-756 PRO2 #3235

----- Original Message -----
From: "Stuart Rohre" <[email protected]>
To: "Wayne Burdick" <[email protected]>; "Elecraft"
<[email protected]>; "Tom Hammond" <[email protected]>
Sent: Wednesday, January 29, 2003 4:55 PM
Subject: Re: [Elecraft] KAT100 ATU and floor tile

> Two ways to attenuate sound:   Absorb it in sufficiently great
transmission
> loss material such as carpet tile, rough side toward sound source,
and near
> enough to not allow the sound to spread much before its trapped, and
> increased density of the case by such as installing sides of lead,
or a
> double box with heavy material like sand in between.
>
> The TL (transmission Loss) of building materials is often given on
the box
> of ceiling acoustic tiles, carpet tiles, etc.   Look up key words
> "Acoustic Transmission Loss" on google.com for industry white papers
on how
> to pick acoustical attenuation materials.
> 72,
> Stuart K5KVH
>
>
> _______________________________________________
> Elecraft mailing list: [email protected]
> You must be a list member to post to the list.
> Postings must be plain text (no HTML or attachments).
> See: http://mailman.qth.net/mailman/listinfo/elecraft
> Elecraft Web Page: http://www.elecraft.com