> Gene W3ZZ (who owns a K3) is saying the > two rigs have very comparable RF performance. I might quibble that he > omitted BDR in his table but perhaps that's more of an HF issue than > VHF > (Gene's focus in the VHF column). For both Phase Noise and BDR, the K3 > exceeds the 5000 by ~15 dB (not insignificant if you're in a > multi-transmitter environment or have a strong local neighbor).
The article also claims -132 dBm MDS for the K3 on 20 m with the preamp on. That's either a typo or a possible test error. The specified typical value is -136 dBm, and I just measured -138 dBm on my lab K3. There are two common measurement errors that can result in an underestimate of MDS: 1. Leaving the AGC turned ON when using the "XG1" method (injecting 1 uV and using the K3's dBV metering function). At the default settings, AGC definitely kicks in below 1 uV. 2. Noise pickup by the signal generator cable in its OFF setting. This can result in a higher noise floor. Better to connect a direct 50-ohm terminator with no coax, if available. 73, Wayne N6KR --- http://www.elecraft.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
