Hello Bozidar, I have K3 #5102 and also well preserved high frequency hearing. I've had the same hiss on my K3 audio since it arrived from the factory. I've used a wide range of headphones, expensive and cheap, and it's present with them all. I discovered that the fix is to introduce some resistance into the audio line and I use a very small, outboard, stereo headphone volume control to do this. I bought several for a few dollars on eBay. I just dial in a very small amount of resistance(I've never actually measured how much) and the hiss is completely gone, with only a very small effect on the K3 audio volume which can be easily compensated for by a tiny increase in the AF gain control if you need to. I have the same hiss on my KX3 audio, which I manage in the same way.
FWIW, I have no hiss at all using the same headphones on my little KX1. Hope that helps, 73, John VK7JB -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-background-hiss-noisy-K3-update-tp7608490p7608510.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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 Message delivered to [email protected]
