Hi Don, OK, the rig is S/N 7225. No KDSP2 is installed. I'm using an external CLRdsp box and speaker. The rig has been working very well; I've received many good signal reports. The DSP , AUX I/O, antenna and mic are all disconnected. I can hear this on the K2's internal speaker as well.
I accessed the menu, and set it to 8R Hold. Then, each time I access that menu, it shows 8R nor, so I'm not sure if the setting isn't "sticking", or that it just resets each time it is accessed (or maybe I don't know what I'm doing). Q23 measures 0V, 0V, 7.9V (8V nominal), which is what the manual says. These pops are not clicking relays. They are in the audio, and might have always been there. I started using VFO B on 15M to check 20MHz WWV, so I just noticed the issue. The loudest pop happens when switching from 15M VFO B to A (but not A to B). None of the other bands do this. It's also rather pronounced when switching into and out of the bands on each side of 15M. Maybe it's just one of those "it just does that" situations, but it seems a bit strange to me that it is only on one band. I do hear a faint one when switching between 10M and 20M, but it's not at all obnoxious. Thanks again. 73, Jim KO5V >Jim, > >Do you have 8R Hold turned on? If not, set it on. > >Remove that external DSP speaker and see if you still have objectional pops. > >Do you have the KDSP2 installed? On older K2s with the older KPA100 >installed, you can experience some harmless "pops", especially if you >have the DSP NR turned on. > >The number of relays which are switched during a band change varies >depending on which bands you are coming from and going to - so relay >clicking is normal. > >You might want to check RF Board Q23 to be sure it is working. The >voltages during receive and transmit should be as shown in the DC >voltage tables. > >73, >Don W3FPR > > >On 6/30/2019 4:55 PM, Jim KO5V wrote: >> Good Afternoon, >> >> Today I noticed a "pop" on the audio of my K2 when I changed in and out 15M, >> so I checked the switching on all bands: >> >> When changing from 15M to 12M or 17M it is fairly loud. Changing from 12M or >> 17M to 15M causes a fainter "pop". A much more attenuated "pop" happens when >> changing from 14M to 10M, and also from 10M back to 14m. >> >> Also, on 15M, when changing from VFO B to VFO A I hear a loud "pop", but it >> does not happen going from A to B. >> >> The fainter "pops" might have always been there, but the ones on 15M are >> loud enough to cause the clip light on my DSP to turn red. >> >> I wonder if it has something to do with diodes across relays, or the relays >> themselves. >> >> Any more ideas? Thanks in advance. >> >> 73, Jim KO5V ______________________________________________________________ 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
