[Elecraft] annoying resonance with internal speaker in K3

[Stewart Baker]

The buzzing I noticed on my K3 is the top cover vibrating against 
the top of the PA shield. There should be a greater clearance 
between the two.

I have been waiting until there is a reason to disassemble my K3, 
so I can take a file to the metalwork. That is what I would do if 
I were building another one from scratch.

Also the ATU board makes intermittent contact with the cover.

73
Stewart G3RXQ
On Sun, 10 Aug 2008 21:47:14 -0600, Fern Rivard wrote:
> 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
>
>
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