[Elecraft] KX3 OSC Temp And Freq Drift Relationship?

[Jack Chomley]

Thanks everyone for the ideas.....I have the XG50 for the job. Doing the Temp Comp routine hopefully will improve the reliability of decoding PSK31 directly with the KX3 and my HCT. Yes, will write down REFCAL, save config thanks Matt.

73,

Jack VK4JRC

Club.    www.cqara.org.au
Member WIA SARL ARRL 
GQRP       #14392
QRPARCI #15068
VKQRP.    #833

> On 27 Mar 2014, at 6:51 am, Matt VK2RQ <matt.vk2rq at gmail.com> wrote:
> 
> Just back up your configuration with the KX3 utility before you start, and for extra security write down your current refcal value. If you do somehow "make a hash" of the compensation procedure, you can simply restore your saved configuration to get back where you started. Even if you somehow didn't save your configuration, it is very simple to simply revert the compensation menu setting from "CUSTOM" back to "STANDARD", and zero-beat your radio to the WWV carrier to reset your refcal.
> 
> Of course, you should only do what you are comfortable with, but in my view (I finally got around to doing the procedure last weekend) it is a reasonably straightforward and nicely automated procedure that yields a big benefit for digital mode operation. The Elecraft team has done well with this one.
> 
> 73,
> Matt VK2RQ
> 
>> On 26 Mar 2014, at 11:59 pm, Jack Chomley <vk4jrc at gmail.com> 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
>> 
>> Club.    www.cqara.org.au
>> Member WIA SARL ARRL 
>> GQRP       #14392
>> QRPARCI #15068
>> VKQRP.    #833
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