[time-nuts] BG7TBL 10 MHz OCXO

[Bob kb8tq]

Hi

G sensitivity in quartz crystals is a pretty well documented sort of thing. For an AT cut numbers in the 1 to 2 ppb per G are
not uncommon. For SC’s the numbers may be a bit lower than that. It simply has to do with the stress / strain properties of
the quartz and how they impact the resonant frequency.

So no, you can’t duplicate it directly with an electromagnetic field. You can indeed tune an SC with voltage on the electrodes.
Not so much with an AT.

Bob

> On Jun 4, 2019, at 6:32 PM, Glenn Little WB4UIV <glennmaillist at bellsouth.net> wrote:
> 
> Can the shift be duplicated by an electromagnetic field?
> If so this may be a was to fine tune an oscillator.
> 
> Glenn
> 
> On 6/3/2019 6:29 PM, Adrian Godwin wrote:
>> On Mon, Jun 3, 2019 at 11:01 PM Andy Backus <andrewbackus at msn.com> wrote:
>> 
>>>   2.  interesting observation: turning the unit 90 degrees onto its right
>>> hand side immediately increases the output frequency by 10 mHz
>>> (reversible); turning the unit 90 degrees onto its left end immediately
>>> decreases the output frequency by 10 mHz (also reversible)
>>> 
>>> 
>> This is quite normal.
>> 
>> https://www.youtube.com/watch?v=zILwgQhjC_Q
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> 
> -- 
> -----------------------------------------------------------------------
> Glenn Little                ARRL Technical Specialist   QCWA  LM 28417
> Amateur Callsign:  WB4UIV            wb4uiv at arrl.net    AMSAT LM 2178
> QTH:  Goose Creek, SC USA (EM92xx)  USSVI LM   NRA LM   SBE ARRL TAPR
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