[time-nuts] "Piezo Little Wonder" OCXO
brooke at pacific.net
Fri May 30 12:24:10 EDT 2008
10.23 MHz shows up in the ICD-200 spec on how the GPS signal is generated.
I've got a GPS sig gen see:
and it has an HP 10.23 MHz oscillator.
http://www.prc68.com/P/Prod.html Products I make and sell
http://www.prc68.com/Alpha.shtml All my web pages listed based on html name
http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Web Cam
Richard (Rick) Karlquist wrote:
> Early GPS receivers used a 10.23 MHz time base.
> Probably related to 2^10-1.
> Some GPS manufacturers approached HP about making
> a 10811 on 10.23 MHz. There is a circuit modification
> for 10.23 MHz and some crystals were made (I
> have some somewhere). However, I don't believe
> any 10.23 MHz 10811's were sold. This unit was
> probably intended to meet the need not filled by HP.
> Rick Karlquist N6RK
> Randy Leifer wrote:
>> This is surplus item I found.
>> Piezo Crystal Company
>> "Piezo Little Wonder"
>> model # 2910007-27
>> Does anyone know the pin-outs (see photo/link)?
>> What is a the freq 10.238 MHz used for ?
>> There is a trim pot, but I doubt it will trim away
>> 238k to get to 10MHz.
>> THANKS !!
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