[Elecraft] [Bulk] Re Elecraft] Crackling in Headphones

[Jim Bolit]

Mileage does vary. I am 99% CW, and have only heard it there. It randomly comes and gpes, e c en when listening to a dead band 10 meters at midnight

Jim
W6AIM



.




The Rake



-------- Original message --------
From: "James F. Boehner MD via Elecraft" <elecraft at mailman.qth.net>
Date: 11/30/2015 8:10 PM (GMT-08:00)
To: "'Brian D. Comer'" <brian at kf6c.com>, elecraft at mailman.qth.net
Subject: Re: [Elecraft] [Bulk] Re Elecraft] Crackling in Headphones

To all with the crackling sound,

I had that problem with AM broadcast.  I enabled the AGC, and the crackling
went away.  No issues right now.

YMMV!

'73 de JIM N2ZZ


-----Original Message-----
From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Brian
D. Comer
Sent: Monday, November 30, 2015 6:41 PM
To: elecraft at mailman.qth.net
Subject: [Bulk] [Elecraft] Re Elecraft] Crackling in Headphones



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



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