Yes, and if the speaker does not have an airtight seal between it and the baffle (the cover on the rig in this case) the mid and lower frequencies will be highly attenuated.
When the cone moves forward on a bare speaker, the air pressure created simply moves around the edges and fills the partial vacuum created behind. The end result is no sound pressure waves leaving the speaker. The only waves created are those high enough in frequency that the outer part of the speaker acts as a self-baffle, leaving only a small center portion of the speaker to produce a sound pressure wave. Ron AC7AC -----Original Message----- Andrew, That is true for the standard speaker, but with the KBT1, the speaker is changed to a smaller one that has no mounting screws, it just sits with its magnet settled into the hole in the battery bracket - it needs to have a foam washer around its magnet to kee3p it from creating "rattlie" noises. 73, Don W3FPR ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
