Hi I wouldn't go to crazy digging up a 10K pot. I suspect that anything in the 10K to 50K range will work ok.
Bob On Aug 28, 2012, at 8:24 PM, jmfranke <[email protected]> wrote: > Now I need to find a 10 KW potentiometer! > > John > > -------------------------------------------------- > From: "Jerry" <[email protected]> > Sent: Monday, August 27, 2012 8:10 PM > To: "'Discussion of precise time and frequency measurement'" > <[email protected]> > Subject: Re: [time-nuts] Isotemp OCXO trimpot question... > >> I don't know if the list allows attachments but I tried to attach to this >> email a datasheet for a very similar Isotemp 10Mhz OCXO (Model OCXO134-10; >> PN 6624.00002). Just in case the attachment doesn't come thru here is the >> relevant section. >> >> I am not certain whether the pins are the same as your model but I believe >> all the Isotemp OCXO have same arrangement: >> >> 3. ELECTRICAL FREQUENCY ADJUSTMENT >> 3.1. Range > ±0.45 PPM >> < ±1.2 PPM (At time of shipment) (Referenced >> to nominal frequency) >> 3.2. Control 0 VDC to Vref (0 VDC to +8 VDC ) or a 10 kW >> potentiometer connected between pins 2 and 4 with wiper connected to pin 3. >> 3.3. Slope Positive >> 3.4. Center Vref/2 ±10% of Vref (+4 VDC to +0.8 VDC) >> >> >> Jerry >> >> >> -----Original Message----- >> From: [email protected] [mailto:[email protected]] On >> Behalf Of Azelio Boriani >> Sent: Monday, August 27, 2012 6:57 PM >> To: Discussion of precise time and frequency measurement >> Subject: Re: [time-nuts] Isotemp OCXO trimpot question... >> >> If there is no datasheet to refer to then the usual value is between 10K and >> 20K. >> 10K is the most common value for 5V or 8V Vref. The OCXO should provide the >> Vref output pin to connect one side of the pot, the other to GND, for a GND >> referenced EFC. Your mileage may vary but, without a datasheet, it is the >> best starting point. >> >> On Mon, Aug 27, 2012 at 11:26 PM, Bud Patten >> <[email protected]>wrote: >> >>> I have an Isotemp OCXO (674-0010-000) an am wondering what is the >>> recommended value for the frequency trim pot? >>> >>> Bud >>> W0LCP >>> >>> Time is only there to prevent >>> everything from happening at once. >>> >>> Einstein >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> _______________________________________________ >> time-nuts mailing list -- [email protected] To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > > > >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
