Hi
Here’s the gotcha with what they are talking about. The SC when done as a
*fundamental* crystal has a higher Q than the AT. You don’t use fundamental
mode SC’s in a normal OCXO.
The issue with Q relates very specifically to the sort of HC-40 package AT
resonators
you *would* use for
The HP Journal article (page 20 March 1981 issue) on the 10811A agrees with Bob.
It also points out that the lack of activity dips due to coupled modes and a
much smaller dependence of the frequency on the signal level are advantages of
the SC cut compared to the AT and BT cuts.
Bruce
> On 13
In message <2573d544-e3c9-4810-95c9-9e3a468ed...@leobodnar.com>, Leo Bodnar wri
tes:
>Here is a random selection of links to back my point of view that,
>if you have noticed, contradicts Bob's.
Given that quartz resonators is still both science and art, I put
my money on the guy who
From: Bob kb8tq
- high-Q crystals require SC-cut
>>> ... An SC has a lower Q than an AT of similar size
>>> and design up to the point acoustic Q losses completely take over.
>>> If you are talking about sub 20 MHz OCXO?s with ?doable? crystal
>>> package sizes, the AT will have the
