Todd, From lack of experimental / theoretical knowledge on the subject, "pulling above" - I took the safer bet!
To pull one needs to change the load capacitance, the oscillator should not make a difference theoretically as the maximum pull will not be dependant on the type of oscillator but the xtal IMHO. I have read something about this in the 70's but cant remember what!
In practice it can be a whole lot different, oscillators have a mind of their own!
Thanks, Raj. Can you explain your choice of "untrue" a bit?
On Mon, Dec 26, 2011 at 11:55 PM, Raj <vu2zap@gmail.com> wrote:
- I would vote for (c) without practical experimentation at my end.
- >Rumor has it that a crystal can be pulled ("rubbered") further in a Pierce arrangement better than in a Colpitts, especially pulling above xtal frequency. This is:
- >
- >(a) True.
- >(b) Partly true.
- >(c) Untrue.
- >(d) None of the above.
- >
- >What do you all think?
- >
- >Thanks
- >
- >Todd
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