[time-nuts] The 5MHz Sweet Spot

Bob Camp lists at rtty.us
Sat Nov 2 01:10:54 EDT 2013


HI

There’s no real reason why you would have more microphonic issues with a scaled larger blank. The bigger blank is likely to have a lower mechanical resonance (mount springs to blank mass) so it’s not going to be a star performer in vibration. 

Bob

On Nov 1, 2013, at 11:50 PM, Bob Stewart <bob at evoria.net> wrote:

> "If you have a 5” blank, your OCXO scales around it. Yes you can do some 
> neat things, but the package is getting bigger. You now need to convince people to buy OCXO’s that are bigger than anything they have seen since the 1960’s. In most cases that OCXO will be 2 to 10 times larger than 
> their entire sub-system. That’s going to be a tough sell."
> 
> Does it become more susceptible to microphonics with larger blanks?
> 
> Bob
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