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 <br...@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, j...@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 > > > > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net <javascript:;> > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to m...@nq6n.com <javascript:;> > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
