Allan, If the KRX3's bandpass filter for 30m has been aligned properly, one thing worth checking is that the 8.215 MHz trap ahead of the bandpass filters is aligned properly.
>From looking at the schematic of the trap, it is likely that the top of the trap's response is not very narrow in terms of attenuation vs. frequency, so if it was tuned too high in frequency it could possibly attenuate 30m signals, but not affect signals on other bands. 73, Geoff GM4ESD On Friday, July 03, 2009 at 4:21 AM, Allan Taylor wrote: >I finally emerged from a very busy spring and had a chance today to go > over operation of the KRX3 in my K3. > Joe, KB8AP, came over and we played for most of the afternoon. Things > are just peachy except that we > noticed on 30m (only) that the KRX3 is consistently much less > sensitive on 30m than the main RX. Other > bands appear to be operating correctly. We tried all combinations of > input antennas, etc. Filters are identical. > All settings apparently identical. > > In fact, this discrepancy won't likely be a major issue for me, but I > would like to figure out what's up and get it > fixed! > > K3 S/N 740, factory updated with KRX3 in April. Identical filters in > both. Running 3.19 firmware now but > behavior identical to that of April (2.??). > > Any ideas?? > > -- > 73 Allan K7GT ______________________________________________________________ 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
