TCXO - 0.5PPM
Posted by
radioshoppe on
Dec 28, 2010; 6:18pm
URL: http://elecraft.85.s1.nabble.com/TCXO-0-5PPM-tp5872529.html
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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