[Elecraft] Eleccraft K2 RX Audio popping noise

[Cameron Francey]

Hi,

I have a question regarding the audio quality on my K2/10.  Its one which I've recently completed so its got all the latest updates etc.

I searched the archives from this group and only found questions about QSK, which is different from what I'm hearing.


On receive I've noticed that there's a bit of a popping sound which is in sympathy with the received signal level.  So in other words if the bar graph S meter is sitting on 1 bar and the noise level is causing the second bar to briefly light the popping noise in the audio happens as the led bar lights on and off.  I was wondering if it was caused by the bar LED its self, so i disabled it in the menu to eliminate it.

I've monitored the purity of the audio signal on my oscilloscope with a signal from my XG3 and I get a really nice clean sine wave at the frequency received.  Listening to this stable signal also sounds great.  So my issue is only with amplitude changing signals.  As you would expect I can see the very brief spike on the scope when it "pops".  If I turn the KAF2 on the popping noise appears to go away.


I've tested this on headphones and the internal speaker, I even tried my original K2 top with the speaker just to eliminate that too.


Has anyone else noticed this?  Do I have a problem with my K2/10?  This doesn't happen on my K2/100, which is how it jumped out to me.  I haven't as yet done any tracing back though the audio path.  I wanted to check here if anyone else has noticed this or if I do in fact have a problem somewhere.

Any info anyone has that might help would be much appreciated.



thanks,

Cameron, AF7DK/GM7LQR