Oliver I guess Elecraft will have to answer this one. Let us know what they say. Steve Ellington n...@carolina.rr.com ----- Original Message ----- From: "orbarrett" <hoosa...@hotmail.com> To: <elecraft@mailman.qth.net> Sent: Monday, May 04, 2009 12:39 AM Subject: [Elecraft] K3 on-channel strong signal overload?
> > Hello all, > > I just finished operating my K3 from my friend's driveway using a portable > dipole on 60M, and wanted to inquire about some incoming signal overload > that cropped up. I was joined while ragchewing with some friends on > 5371.5 > by two other friends locally, one operating HF mobile from the same > driveway > and another operating from a base rig in the shack (using a backyard > dipole > antenna). When either of these two friends transmitted on the same > channel > (at 100W), I observed severe signal breakup in the K3 receive audio. > > To investigate further, I switched the portable antenna from the K3 to my > friend's FT-817 on the same operating table, and no audio breakup was > observed under the same conditions. Returning the antenna to the K3, I > then > got rid of most of the signal breakup by turning on the input attenuator > and > turning down the RF gain to near minimum. > > Is it possible that the extremely strong on-channel signal in this case is > exceeding the ability of the K3's hardware AGC to protect the A/D > converter > input? Thanks for any suggestions on this, including anything I may have > overlooked. AGC was enabled and both the NB and NR were switched off. > > I should mention that these conditions of operating portable (with several > hams close-in on the same channel) are very demanding, but happen > occasionally in certain situations such as for HF Pack operating. > I'm also using the rig in HF mobile service, and enjoy it very much. > > I appreciate any help in advance, > Oliver Barrett KB6BA > -- > View this message in context: > http://n2.nabble.com/K3-on-channel-strong-signal-overload--tp2785612p2785612.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 ______________________________________________________________ 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
