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, [EMAIL PROTECTED] 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 > > _______________________________________________ > Elecraft mailing list > Post to: [email protected] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
