[Elecraft] Re Elecraft] Crackling in Headphones

[Brian D. Comer]

I have noted a similar Cracking in the speaker when listing to AM broadcast
station KFI (640 KHz). At first I assumed it was just overload as I was
using a 160 meter dipole and the signal strength meter was maxed: however
moving to steppir antenna tuned to 40 meters gave the same result with and
smeter reading of only S9. 

I have a local AM station on 1450 KHz that produces a -10 dBm into a
spectrum analyzer and -30 dBm on the P3. I had assumed from this, without
making any further checks, that the receiver was just overloaded.  

The cracking sound does not sound like any dynamic range problem I have
heard before but I have not taken the time to make any serious tests. 

I make these comments because I am not convinced this is any form of
overload and wonder if it could be related to your problem.

 

73 Brian KF6C.  

 

On 30 Nov 2015 14:02, john at kk9a.com wrote:

> There are times that I have noticed a crackling sound in my headphones 

> with my K3S. This is not the normal band noise static that has depth, 

> this crackle sound seems very close to my ears.  I first noticed it 

> with my Heil headset and I tried wiggling the connection, changing the 

> RX EQ settings and turning on noise reduction but nothing had any 

> effect. It randomly comes and goes and I think I have also heard it on 

> TX. I thought perhaps it was related to the Heil brand headphones. 

> Last night I plugged in a new Sony professional headphone and the 

> crackling sound was very strong for a few minutes and then eventually 

> went away. I have never experience this with any other radio and I 

> have no idea what is causing it or how to make it go away.

> 

> John KK9A