YES!!!! Don speaks the truth. Your K3 thinks you WANT it to amplify the heck out of everything in search of the weakest of signals and it is dutifully trying to do that.
Back down the value of AGC THR in the menu, turn down RF Gain, turn up your AF Gain and turn off your preamp on 160-20M. 73, Barry N1EU Don Wilhelm-4 wrote: > > Mike, > > That could easily happen if you have the AGC on. That would be > especially true if you have the preamp on when it is not needed and are > running the RF Gain at its full setting. With a signal present, the AGC > is acting to keep the receiver gain low, but when the signal is no > longer present, the receiver bounces back to full gain. > > Try the same test with the AGC off and the preamp off (even with the > attenuator on) and the RF Gain backed down so the no-signal noise with > your vertical connected is just perceivable. Then tune in a signal, > note its strength and remove the antenna. The noise level should be > absent (unless you have the AF Gain set really high). If you still get > noise with no antenna, you have a receiver fault that needs attention. > > 73, > Don W3FPR > > K2MK wrote: >> One test that I have performed leaves me scratching my head as to its >> results. Maybe someone can enlighten me. I tune to a medium strength CW >> signal and press my ANT button to switch between ANT 1 and ANT 2. I have >> nothing connected to ANT 2. The signal disappears but the background >> noise >> level remains the same. >> >> 73, >> Mike K2MK >> >> > ______________________________________________________________ > 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 > > -- View this message in context: http://n2.nabble.com/K3-receiver-noise-questionable-test-results-tp4186597p4186962.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ 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
