Only the first oscillator in your list is voltage controllable (VC). If you want to steer it with a GPS as we have been discussing, it needs to be voltage controllable.
You will also want to consider the mounting and whether you are able to solder surface mount devices like the second one in your list. You will also need to consider what power supply voltage(s) you have available and whether you want sine or TTL output voltage. These parameters will narrow your selection considerably. Also if you have the power available you will get much better stability if the oscillator has an oven (OCXO) Pretty good surplus OCXOs are available for less than $25.00. With an OCXO you might also look for one that has a reference voltage output. If you can use this voltage to power the analog part of your tuning circuitry, you won't have to worry about the effect of power supply stability on that portion of your system. The stability of any surplus oscillator is pretty much a crap shoot. You can get them cheap but you might have to sort through a few to find one that is good enough for your purposes.. On Mon, Oct 5, 2015 at 8:22 AM, Can Altineller <[email protected]> wrote: > Hello, > > I am want to buy some VCXO's but really simple and cheap ones. I requested > a quote from goledge.com and their prices are around 180GBP per unit, and > I > dont want to pay that much given you can buy a rubidium standard for > comparable prices. > > I looked on ebay and found those candidates: > > > http://www.ebay.com/itm/12-8MHz-NKG3001B-VC-TCXO-DIP-NDK-New-x2pcs-Oscillator-VCTCXO-VCXO-TCXO-GPSDO/310376642284?_trksid=p2045573.c100033.m2042&_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D32831%26meid%3D822a498fde5a4f19b8d5909a2b8496c5%26pid%3D100033%26rk%3D1%26rkt%3D3%26sd%3D310376642284 > > > http://www.ebay.com/itm/3-PCS-TCXO-6663-12-8-TCXO-25-4-x-29-21-x-10-03-SMT-VECTRON-INTERNATIONAL-/221657383361?hash=item339bcf41c1 > > > http://www.ebay.com/itm/Free-shipping-ONE-PIECE-PRECISION-0-3ppm-12-8MHz-12-8M-DIP-TCXO-/141771669896?hash=item2102400188 > > The third one is nice, it says 0.3ppm, but I am not sure if the specs are > true. > > Any recomendations on where to source cheap vcxo or vctcxo's? 10mhz or 12.8 > mhz is ok, and <1ppm would be nice. > > Best regards, > C.A. > _______________________________________________ > 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. > -- --Jim Harman _______________________________________________ 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.
