[Elecraft] XG2 Frequency Accuracy

[Don Wilhelm]

  Dave,

I would expect the frequency to be within a couple hundred Hz of the 
frequency on the crystal.
Yes, you should be able to pad the frequency down with a small parallel 
capacitor, just like any VXO.  I don't know how much range you would get 
without adding a series inductor to the bottom side on the crystal.  
Experiment with it and see what you get.

Actually, I think it would be easier to just build a VXO or two - 
manhatten construction is quite easy to do, just cut some pads for the 
parts of the circuit that need to be isolated from ground and glue them 
to a PC Board ground plane - alternately, use high value resistors (4.7 
megohms for instance) to serve as "insulators" and build it using Wes 
Hayward's "Ugly Construction" techniques.

73,
Don W3FPR

On 12/12/2010 12:23 AM, David Gilbert wrote:
>
> Yeah, I understand that.  I was just wondering how close they might be 
> since I don't have a clue what the tolerance is of the crystals used 
> by Elecraft.  Specifically, I was wondering if they would be close 
> enough (typically) to use for in-band IMD tests as a function of AGC 
> settings.  Or at least close enough that whichever one was higher in 
> frequency could be easily padded down to within a few tens of Hz or so 
> of the other.
>
> 73,
> Dave   AB7E
>
>
>
> On 12/11/2010 7:22 PM, Don Wilhelm wrote:
>>  Dave,
>>
>> The frequency accuracy of the XG2 will vary with the individual 
>> crystals.  It is not specifically for frequency accuracy, but for 
>> level accuracy.
>>
>> In other words, I would not depend on the XG2 for any sort of 
>> frequency calibration unless you measured the output of a particular 
>> one with a calibrated frequency meter.
>>
>> 73,
>> Don W3FPR
>>
>> On 12/11/2010 9:00 PM, David Gilbert wrote:
>>> Does anyone know the typical frequency accuracy of the XG2?  If I had
>>> two XG2's, what would be the typical separation in frequency between 
>>> the
>>> two of them at the 14060 setting?
>>>
>>>
>>