[Elecraft] annoying resonance with internal speaker in K3

[Fern Rivard]

    I have a K3 serial #412 which has always had an annoying resonance from the internals of the radio cabinet somewheres when using the internal speaker. I thought that it may have been the top lid which did that so I tried to isolate the top lid by temporarily adding some electrical tape between the top and when it meets the the top of the radio. However, that did NOT accomplish anything for me. Has anyone found a permanent cure for that annoying resonance? 
    This afternoon I took my K3 for a bit of "Show and Tell" to a get together picnic that our local ham club put on  this afternoon. Not having a spare antenna conveniently laying around, I just took a small roll of telephone extension wire "4 conductor in it) so I soldered all four wire together with enough solder residue so that it would just fit inside the SO-239 ant#1 rear connector. I guestimate that I had an approximate lenght of 35 feet or so of wire that I strung between trees. I had the K3 on a padded surface on the hood of my vehicle to make it handy for the audience to see it. I tried the automatic antenna tuner on all bands from 80 to 10 meters with a resultant perfect match from 75 meters all the way to 10 meters with 1:0 to 1 match. Unfortunately band conditios were not very good today.

    73 from Fern   VE7GZ