[hpsdr] Suggesting VCTCXO oscillator

[Glenn]

Hi!

Looking at the schematic of Excalibur, I found out that the crystal 
oscillator is a CXOH20.

http://openhpsdr.org/wiki/index.php?title=EXCALIBUR

CXOH20   37 euro  +-1ppm    20mA   5V   SSB phase noise -125dBc/Hz at 1kHz offset:
http://search.digikey.com/scripts/DkSearch/dksus.dll?WT.z_header=search_go&lang=en&site=dk&keywords=CXOH20

-

Have somebody thought about a voltage trimmed VCTCXO instead? - e.g. 
VC-TXO-23SM-100-B:

VC-TXO-23SM-100-B   8 euro   +-2,5ppm   1,5mA     3V   SSB phase 
noise -130dBc/Hz at 1kHz offset:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=XC1618CT-ND&itemSeq=84685641&uq=634061343209855345

Then a potentiometer - or a slow DA-converter can be used to trim it, 
instead of a mechanical solution.

/Glenn