Just completed my third K3/100 build (this one is actually mine!), and like the other 2, this one had a speaker buzz (not heard through headphones) at audio frequencies around 300 hz on CW, but this one seemed worse. I fixed it by:
1. Lining the lip and inside of the speaker shield with one layer of 3M electrical tape. This removed ~80% of the buzz. 2. Putting a 1" long piece of same tape over the middle of the top edge of both sides of the KPA3 module shield. This put tape between the top edge of the shield and the top cover of the K3. This removed the remainder of the buzz, and I now have clean CW tones through the speaker! 73, Randy, KS4L ______________________________________________________________ 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
