[Elecraft] K3 MDS calculations using the Elecraft XG2
Lyle, KK7P responded to my question on where to find a suitable DMM: If using the K3, use the internal RMS audio meter (tap DISP then rotate until you see AFV) Thanks Lyle. Great answer! Hidden treasures are always just in front of us. And thanks to Elecraft for another outstanding feature. Unfortunately, The MDS calculations using AFV were identical to those using the Sears autoranging DMM. I'll discuss these with Elecraft support to see if there is a fix. 73, Fred AE6IC __ 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] K3 MDS calculations using the Elecraft XG2
I set up the K3 Rx sensitivity test (using 1 microvolt signal) according to XG2 manual. It seems to work in general except that the resulting MDS calculations seem too low: 123 dBm on 80 meters, 132 dBm on 40 meters, and 130 dBm on 20 meters. I am using the front headphone jack on the K3, with the CONFIG:SPKR = 1. AGC is off. Preamp is own, RF AF gains are at maximum, and the CW passband is set to 500 Hz. The AC measurements were made using a Craftsman autoranging multimeter. Example: on 40 meters the reading was 0.310 V with XG2 on and 0.018 V with XG2 off. (0.310/0.018) = 17.2. Log 17.2 x 20 = -24.7 dBm. MDS = -107 dBm -24.7 dBm = 131.7 dBm. I was expecting a better value (maybe -137 dBm?) Could it be a problem with the DMM? If so, is there a recommended DMM? Thanks in advance for your help. 73, Fred AE6IC __ 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
Re: [Elecraft] K3 MDS calculations using the Elecraft XG2
Could it be a problem with the DMM? If so, is there a recommended DMM? If using the K3, use the internal RMS audio meter (tap DISP then rotate until you see AFV). 73, Lyle KK7P __ 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
