[time-nuts] AN/URQ13 reference AT cut crystal?

[Hal Murray]

kb8tq at n1k.org said:
> …… and there are whole families of crystal cuts that have been optimized for
> use as thermometers. There is no need to compromise on something like an AT
> or SC if you are after temperature. There are lots of different  cuts to pick
> between.  

How many degrees of freedom are there if I want to make a crystal?  What 
fraction of the space has been explored?

Rotation in 3D has 3 degrees of freedom, but we are making a plane so I think 
we get one back.

How accurately does a the crystal have to be oriented?  If I'm doing a brute 
force search, how close together would I have to make test samples in order to 
not jump over something interesting?


If I pick a type of cut, say AT, does the shape (round, rectangular) effect 
the temperature profile?  If it's rectangular, that may add another degree of 
freedom.


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