Oliver, I was wondering about this, I guess it is just that the short term drift is lower so it won't drift as much between frequency measurement corrections which are made for 1 second every 4 seconds according to some info recently published. I doubt it matters much though. I would be tempted to try it with the standard TCXO first.
Maybe someone from Elecraft would like to comment. 73 from David GM4JJJ > On 12 Mar 2016, at 07:17, Oliver Dröse <dro...@necg.de> wrote: > > Why would I need the TCXO-3 instead of the TCXO-1 when using the K3EXREF if > the accuracy and stability is provided by the EXREF? Am I overlooking > something here? > > Tnx & 73, Olli - DH8BQA > > Contest, DX & radio projects: http://www.dh8bqa.de > > >> Am 11.03.2016 um 22:30 schrieb Edward R Cole: >> First one needs to realize that the TCXO establishes the basic stability, so >> choosing the TCXO-3 over the TCXO-1 will provide better stability and >> accuracy (these are two different things). I bought the TCXO-3 with my >> initial K3/10 purchase so the rest of what I say is with the better TCXO-3 >> installed (if frequency is important then that is first thing I recommend >> updating). >> >> Mostly, I use 28-MHz as a testing frequency since it is my VHF transverter >> IF. On 28-MHz with only the TCXO-3, I see 14-Hz inaccuracy. This >> 14/28000000 = 0.5 ppm (I think this is better than Elecraft specs the >> TCXO-3). Adding the EXREF I see 2-Hz which is "about" 0.1ppm. Measurements >> on 50-MHz are proportional. I see 3-4 Hz accuracy using the EXREF. > > ______________________________________________________________ > 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 gm4...@yahoo.co.uk ______________________________________________________________ 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
