[Elecraft] Re Elecraft] Crackling in Headphones

[DGB]

No Matt but will look into that tomorrow! Thanks!

73 Dwight NS9I

On 11/30/2015 6:55 PM, Matt Murphy wrote:
> Just wondering if either of you have done the RF gain calibration before
> and/or after the synth board upgrade.
>
> 73,
>
> Matt NQ6N
>
> On Monday, November 30, 2015, Brian D. Comer <brian at kf6c.com> wrote:
>
>>
>> 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 <javascript:;> 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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