[hpsdr] Phoenix - footprint for high performance crystals

[Grant Hodgson]

Richard

HC18/U is fine, it is possible to get some very high performance 
crystals in this package.  If it's not too late, I would lay out the 
board for the 3-lead version of the HC18/U, with the third (centre) lead 
connecting to the package itself.  This can then be connected directly 
to ground if a 3-lead crystal is used.

Has anybody got any results from testing the first batch of Phoenix boards?

regards

Grant  G8UBN



richardh at iinet.net.au wrote:
> 
> Dear all
> Next iteration of Phoenix is nearly finished. AD9912 hopefully correct and the low 
> noise oscillator circuit added.
> One last detail:
> What footprint is generally used for high performance crystals in the low noise 
> oscillator?
> I have put a through hole HC18/U and a SM pattern on the board 
>  
> Thanks 
> Richard VK6BRO
> 
> 


 1207661685.0