[Elecraft] KX3 + JT9 -- any successes?

[Don Wilhelm]

It is good that you are not complaining, but I just don't *get* it.
The specification is for +/- 1ppm over a temperature range of 0 to 50 degC.
You say the mode being tried needs .05 ppm or even .01 ppm.  Why would 
anyone attempt to use a radio for that mode for which the specification 
is worse than the needed stability by a margin of 20 to 100 times?
One might expect success with a factor of 2, or even 5, but to expect 
success with an instrument that is 20 to 100 times less frequency stable 
than required just makes me shake my head.

Compare it to trying to make a measurement in the low millivolt range 
using a voltmeter only good to 0.1 volt.

73,
Don W3FPR

On 7/30/2014 11:58 AM, Martin AA6E wrote:
> I'm not complaining.  Nobody promised the KX3 was good for EME -- or 
> VLF datacom!  It is a shame that there's not better thermal isolation 
> for the reference oscillator.  I think Elecraft meets its own (vague - 
> what time scale, what environmental conditions?) +/-1 ppm "typical" 
> spec, but the problem is that we need better stability than that over 
> a 1-minute transmission cycle  -- .05 ppm or even .01 ppm.