Well, I wasn't thinking that specific :-) I was just curious about this line of OCXO's. They are rather large by today's standards. I find it curious that I don't find any info or history on this type of OCXO, being it is made by FEI. You'd think their web site would have some history.
The other point I was wondering about is the possiblity of unsoldering the base without destroying the OCXO. The can looks to be stainless steel and I imagine it would take a bit of heat to unsolder it. Although I appreciate Bob's replies, does anyone else care to add anything? Joe Gray KA5ZEC On Fri, Dec 4, 2009 at 6:00 PM, Bob Camp <[email protected]> wrote: > Hi > > Best guess would be a system that needed to be 8 Hz off of 775 MHz after > multiplication .... > > Bob > > > On Dec 4, 2009, at 6:47 PM, Joseph Gray wrote: > >> Thanks for the answer. Any idea what these things were used in? I >> can't seem to find any information on the net. >> >> Joe Gray >> KA5ZEC >> >> >> On Fri, Dec 4, 2009 at 5:27 AM, Bob Camp <[email protected]> wrote: >>> Hi >>> >>> Simple answer - yes. >>> >>> More details: >>> >>> The oven and oscillator supplies are split so you can regulate them >>> independently. Since there is very little current change (and very little >>> current) on the oscillator line you can regulate it pretty tightly. >>> >>> The oven monitor reports the current being pulled by the oven heater. >>> There's no need to terminate it. The two likely options are either a TTL >>> signal indicating it's gotten to a "warm" condition or a linear voltage >>> tracking the current. Watch it with a DVM when you put power on the oven >>> supply. >>> >>> Bob >>> >>> >>> On Dec 4, 2009, at 12:10 AM, Joseph Gray wrote: >>> >>>> I came across a rather large OCXO from Frequency Electronics. The >>>> model number is: FE-30-OPC-2F. The frequency is: 10.763889MC. The >>>> pinout for the octal plug on the base is also labeled as follows: >>>> >>>> 1: +28VDC >>>> 2: Oven Monitor >>>> 3: Oven Ret. >>>> 4: Spare >>>> 5: Spare >>>> 6: Osc. Ret. >>>> 7: +28VDC Osc. >>>> 8: Spare >>>> >>>> I have a few questions. Can pins 1 and 7 be tied together to the same >>>> 28VDC supply? If so, then I assume pins 3 and 6 can also be tied >>>> together? I assume that pin 2 is simply some output voltage, >>>> proportional to the oven temperature? Is it safe to just apply power >>>> and let it run without using pin 2? >>>> >>>> Once I know how to power this thing without blowing it up, I'll hook >>>> it up to a scope and take a look at both pin 2 and the oscillator >>>> output on the BNC. >>>> >>>> In case anyone is interested, here are the dimensions, not counting >>>> the octal plug and BNC: 5" high x 3" x 3". There is a "Frequency >>>> Adjustment" screw on the top. >>>> >>>> I did a Google search, but didn't turn up any information on this >>>> unit. I was rather surprised, considering the name Frequency >>>> Electronics. Does anyone know the history of these things? >>>> >>>> One last question. The can is soldered at the base. Is is possible to >>>> unsolder it and replace the crystal without destroying things? >>>> >>>> Joe Gray >>>> KA5ZEC >>>> >>>> _______________________________________________ >>>> 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.
