[Elecraft] KX3 OSC Temp And Freq Drift Relationship?

[Jim Bennett]

Jack, 

My KX3 #5539 is used on and off for PSK31 and JT9 / JT65. I've made a bunch of JT65 and JT9 QSO's with it on 80, 20, and 10 meters, in addition to quite a few PSK31 contacts on several bands. That being said, I did do the temperature compensation procedure before I started doing data JT9 and JT65 modes with the KX3. As Don said, it is a very easy procedure, but just set aside about 90 - 120 minutes to complete it. The only tools you need are (1) a refrigerator, and (2) a hair dryer. :-)

73, Jim / W6JHB


On   Wednesday, Mar 26, 2014, at  Wednesday, 5:59 AM, Jack Chomley wrote:

> Tonight I have been experimenting on PSK31 at 3 watts and 5 watts. In my shack the OSC Temp is about 38 deg and transmitting my CQ call about every 60 seconds @ 3 watts takes the OSC Temp to 39 deg, on RX it drops back to 38 deg.
> At 5 watts it goes up to 41 deg, but immediately settles back to 38 deg.
> My question is, what would the estimated frequency change be, per degree of OSC Temp change? I am trying to work out the total freq shift between the start and the end of my PSK31 transmission.
> Now, I have not done the OSC temp compensation routine to my radio. Trying not to go down this road in case I make a hash of it :-)
> In closing, I will not be using WSPR or JT65 etc with this radio.
> 
> 
> 73,
> 
> Jack VK4JRC
> 
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