Hi Oli, I agree it looks like there is no point in paying for the TCXO-3 if you have a reliable constantly available 10 MHz external reference. Perhaps they recommend the better TCXO as a better fallback if for any reason the external ref is not available, I can't think of any other reason for it.
73 from David GM4JJJ > On 13 Mar 2016, at 09:27, Oliver Dröse <dro...@necg.de> wrote: > > Thanks Ed. > > I don't have a problem understanding how the TCXO's work. Maybe I was not > clear enough. ;-) Taking your example from below, having only the TCXO-1 it > is surely *not* drifting 140 Hz at 28 MHz within the 4 or 5 seconds of the > EXREF update cycle (same as the TCXO-3 will not drift by 28 Hz in that time), > otherwise the K3 would be a *very* crappy radio. ;-) Think you are missing > the time domain here. ;-) > > So my question still stands: What's the real value of the TCXO-3 over the > TCXO-1 when using the K3EXREF? Unfortunately I do neither have the measuring > equipment to measure below 1 Hz drift (and I'm not seeing that amount with my > TCXO-1 only K3) nor a TCXO-3. So will the radio drift by 0.0014 Hz with the > TCXO-1 + K3EXREF within those 4 seconds and the TCXO-3 will bring it down to > 0.00028 Hz? Then I'm probably fine with the TCXO-1 and even the most > sophisticated digital modes available. ;-) > > 73, Olli - DH8BQA > ______________________________________________________________ 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
