>> Being able to lock my K3 to an external 10MHz reference might be nice someday though.
> That might make it more stable but it won't make it more accurate. > > For the reason why, see: > http://n2.nabble.com/Ref-Osc-Cal-Method-4-td2595451.html#a2595451 Wes, I read your description, but are you also implying that a 10 MHz GPSDO would not provide additional accuracy to the K3? When a precision 10 MHz time base is used as a superhet receiver's frequency reference, the accuracy is generally not as good as the precision time base itself owing to decimation error, but it is still significantly better than an internal TCXO even when the best calibration methods are used. For example, when a GPSDO is used with the Icom 7700, absolute accuracy does not approach the 1x10^-11 long-term accuracy of the GPSDO and can be off by ~ 0.05 Hz at 1 MHz and probably rivals the real-world accuracy of its internal 0.05 ppm OCXO. But the K3's optional TCXO is specified at 1.0 ppm accuracy. So, if the K3 were combined with a GPSDO or a high-quality OCXO, I would expect much better accuracy and stability than that of the Elecraft TCXO. Paul, W9AC ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
