[Elecraft] K3 - background hiss (noisy K3) - update

[VK7JB]

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.