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Old May 1st 05, 12:03 AM
Ed Price
 
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"Richard Clark" wrote in message
...
On Fri, 29 Apr 2005 20:27:51 -0700, "Ed Price"
wrote:

I had considerable problems with
resonances, starting around 7 MHz and continuing through about 150 MHz,
associated with the chamber XYZ dimensions.


Hi Ed,

When I was in the Navy, my buddy had, in his former life, been a pipe
organ technician (the old fashion type, not the Hammond home organ
type). He had worked in the really large Pizza 'n' Pipes types of
concessions up and down the Pacific coast, and in the classic theaters
of the 30s vintage (Paramounts, Pantages, Orpheums, etc.). He related
how those venues made sure that when constructed, no two walls met at
90° nor were parallel so as to break up resonances.

73's
Richard Clark, KB7QHC



Umm, yes. Unfortunately, the suppliers of modular shielded enclosures are
rigorously orthogonal guys! g

--
Ed
WB6WSN
El Cajon, CA USA