Re: [Elecraft] K3 Sensitivity problem on 75/80 and 160 meters
Joe, Bill, and Buzz: Check RX ANT selection on 80 Meters? Of course I che Never mind. Thank the three of you for fixing the problem that has plagued me for two months. 73, Jan, KX2A __ 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
Re: [Elecraft] K3 Sensitivity problem on 75/80 and 160 meters
Jan, Check your antenna selections - ANT1 vs. ANT2 or RX ANT on vs. off. The amount of attenuation you hear is about the same as the isolation between the antenna selection in the K3 (40 to 50 dB). The antenna selection is on a per band basis. 73, Don W3FPR On 3/15/2015 8:41 PM, Jan wrote: I have a K3 that works fine on all bands except 75/80 and 160. I have a backup rig, an IC-730 from the 1980's, that has 75/80 but not 160. I did an A/B with the two rigs on 80 meters, and both the S-meter and my ears tell me that signals are 5-7 S-units weaker on the the K3. S/N is clearly worse on the K3 than on the 730. Can someone clue me as to how to chase this down? Even if I have to send a board back to Elecraft, I would like to do that rather than send the radio. __ 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
[Elecraft] K3 Sensitivity problem on 75/80 and 160 meters
I have a K3 that works fine on all bands except 75/80 and 160. I have a backup rig, an IC-730 from the 1980's, that has 75/80 but not 160. I did an A/B with the two rigs on 80 meters, and both the S-meter and my ears tell me that signals are 5-7 S-units weaker on the the K3. S/N is clearly worse on the K3 than on the 730. Can someone clue me as to how to chase this down? Even if I have to send a board back to Elecraft, I would like to do that rather than send the radio. Thank you, Jan, KX2A __ 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
Re: [Elecraft] K3 Sensitivity problem on 75/80 and 160 meters
Can someone clue me as to how to chase this down? The easiest, most accurate way is to actually measure sensitivity using an XG-2 or XG-3 signal generator. You can check the S-meter on 80 and 160 compared to 20 meters and calculate the MDS on each band following the method in the signal generator manual. Have you calibrated the RF gain of the rig and checked the antenna settings (ANT 1/ANT 2 if you have the KAT3 or Main/RX if you have a KXV3 installed)? Both antenna settings are saved per band as is the preamp and attenuator. 73, ... Joe, W4TV On 2015-03-15 8:41 PM, Jan wrote: I have a K3 that works fine on all bands except 75/80 and 160. I have a backup rig, an IC-730 from the 1980's, that has 75/80 but not 160. I did an A/B with the two rigs on 80 meters, and both the S-meter and my ears tell me that signals are 5-7 S-units weaker on the the K3. S/N is clearly worse on the K3 than on the 730. Can someone clue me as to how to chase this down? Even if I have to send a board back to Elecraft, I would like to do that rather than send the radio. Thank you, Jan, KX2A __ 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 li...@subich.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 Message delivered to arch...@mail-archive.com
