[Elecraft] Buzzy K2 speaker

[Stewart Baker]

I think that if the battery is fitted that gives a degree of rigidity to the top 
panel, and damps down any vibrations. On my K2 with no battery I used a piece of 
thick felt glued to the inside of the top cover. Works a treat.

73
Stewart G3RXQ 
On Mon, 20 Feb 2006 22:33:00 GMT, gwwhatley at juno.com wrote:
> My K2 had a very irritating buzz (sympathetic vibration) at about 400 hz.  I
> noticed if I pressed on the top cover, it quit.  No amount of adjusting the
> four speaker mounting screws worked.  That ruled out the speaker itself, I
> reckoned.  So, I took the top off, turned it upside down and put pieces of "Q
> Pad around the speaker, covering most of the vacant area.   Hot dog!   Buzz
> went away.
>
> Q Pads are +/- 3/32 inch thick fibrous pads with one sticky side, are used in
> cars to quieten vibrating panels and can be found at professional auto paint
> stores.  Used 'em on my old Ford diesel and quietened it down.  CAVEAT:
> Since the pads are kinda heavy, and are hanging from the top panel, I can't
> vouch for how long they will stay stuck.  They did stay stuck to the bottom
> of my old diesel's oil pan for years and may still be there.  I traded the
> truck.   However, they work so well if they drop down, I will figure some way
> to hold em up.  My ohmmeter says they are nonconductive.  The pads come in
> packs of several roughly 10" sq pads.  Maybe a friendly hot rod shop would
> sell just one, which is more than enough area.
>
> Another idea is to affix 1/8 in thick aluminum pieces with contact cement.
>
> 73 from N4YM, George
>
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