Sort of yes and no, I suspect you'll need to buffer the oscillator then take a tunable output from the buffer.
In my limited experience with Xtals they a manufactured to resonate at the frequency stamped on the can, eg: if it says 1MHz on the can then that's it, that's the frequency it's designed to operate at, no other, even though in practice it might, oscillator circuits produce all sorts of harmonics/mixed frequencies and general crud, where ever you want it's designed frequency to end up in a particular application then I would say make sure it ends up there via a tuned tank/filter etc unless you intend to use the oscillator as an harmonic marker.
On another note, here's an old favourites link of mine, if you open it, it should open in the middle of a chapter on the TPTG oscillator....keep scrolling down...should end up with a chapter on quartz xtals and oscillators etc, I've just checked the link and there were no page interruptions when I scrolled through it:
https://books.google.co.uk/books?id=f9QXAAAAYAAJ&pg=PA54&dq=tptg+oscillator&hl=en&sa=X&ved=0ahUKEwjyloPD9qrRAhWHHsAKHZZQBwYQ6AEINDAC#v=onepage&q=tptg%20oscillator&f=false
Lawrence.
In my limited experience with Xtals they a manufactured to resonate at the frequency stamped on the can, eg: if it says 1MHz on the can then that's it, that's the frequency it's designed to operate at, no other, even though in practice it might, oscillator circuits produce all sorts of harmonics/mixed frequencies and general crud, where ever you want it's designed frequency to end up in a particular application then I would say make sure it ends up there via a tuned tank/filter etc unless you intend to use the oscillator as an harmonic marker.
On another note, here's an old favourites link of mine, if you open it, it should open in the middle of a chapter on the TPTG oscillator....keep scrolling down...should end up with a chapter on quartz xtals and oscillators etc, I've just checked the link and there were no page interruptions when I scrolled through it:
https://books.google.co.uk/books?id=f9QXAAAAYAAJ&pg=PA54&dq=tptg+oscillator&hl=en&sa=X&ved=0ahUKEwjyloPD9qrRAhWHHsAKHZZQBwYQ6AEINDAC#v=onepage&q=tptg%20oscillator&f=false
Lawrence.
