[Elecraft] TCXO - 0.5PPM

Jim Harris jim.w0em at yahoo.com
Tue Dec 28 13:18:47 EST 2010


Hi Folks,

Been kicking around putting the 0.5PPM TCXO in my K3.  After doing some reading a question or two arises.  The instructions sheet(s) for the TCXO mentions using method 1,2 or 3 in the K3 manual to set frequency.  The K3 manual does not have a method 3 as I can find.  I've checked the reflector archive and found there is a data input feature in the K3 utility for inputting data received with the TCXO.  I think this equals method 3.  Someone make a note to change instructions/manuals if needed.

My question is do I need to do a method 1 or 2 before doing the data input?  Method 1 is to use a freq counter.  My freq counter is only about +/- 10 Htz depending on variables.  Method 2 is zero beat.  By ear the best I can get is about +/- 25 Htz.  How close do I need to get with method 1 or 2 (if needed) before inputting the data?

Second question, will the 0.5PPM TCXO eliminate the hysteresis I see during RTTY?  Depending on whether I tune to a signal from low to high or high to low I can see 10+ Htz difference in the signals frequency.  Or, are other factors at work?

Constructive thoughts appreciated.  

Happy New Year.  73

Jim, W0EM


      


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