Here's a good commercial GPS antenna made by Lucent and others that I have been using the last 4 years close to my antennas running 1KW without a problem. It's amplified but has a very selective front end which is made to operate in high RF environments.
http://www.diltronic.com/wordpress/wp-content/uploads/2010101GPS-TMG-26N.pdf It's the bullet type in the first few listings. http://compare.ebay.com/like/300877142428?var=lv<yp=AllFixedPriceItemTypes&var=sbar Jim K5HY > From: [email protected] > Date: Fri, 7 Jun 2013 00:31:08 -0500 > To: [email protected] > CC: [email protected] > Subject: Re: [FlexEdge] GSPDO Outdoor Antenna for 6700 > > Oh and Mike on the antenna the GPSDO will supply power for an external > antenna. I would say that the chief requirement is to get an antenna that > will not have issues with RF at your ham station. You wouldn't want to buy > one with a preamp that is susceptible to whatever RF level you will have at > whatever distance your station antenna(s) will be. > > Steve > > Stephen Hicks, N5AC > VP Engineering > FlexRadio Systems™ > 4616 W Howard Ln Ste 1-150 > Austin, TX 78728 > Phone: 512-535-4713 x205 > Email: [email protected] > Web: www.flexradio.com > Click Here for PGP Public > Key<https://sites.google.com/a/flex-radio.com/pgp-public-keys/n5ac> > > > > *Tune In Excitement™* > PowerSDR™ is a trademark of FlexRadio Systems > > > Steve > > Stephen Hicks, N5AC > VP Engineering > FlexRadio Systems™ > 4616 W Howard Ln Ste 1-150 > Austin, TX 78728 > Phone: 512-535-4713 x205 > Email: [email protected] > Web: www.flexradio.com > Click Here for PGP Public > Key<https://sites.google.com/a/flex-radio.com/pgp-public-keys/n5ac> > > > > *Tune In Excitement™* > PowerSDR™ is a trademark of FlexRadio Systems > > > On Fri, Jun 7, 2013 at 12:28 AM, Stephen Hicks, N5AC > <[email protected]>wrote: > > > First, an explanation of what a GPSDO is: Most oscillators that are used > > as the frequency reference for a radio will drift over time. If you > > purchase a radio with a crystal oscillator, a temperature controlled > > crystal oscillator (TCXO) or an ovenized crystal oscillator (OCXO), you > > will notice that over time these will drift. An adjustment is required > > every six to twelve months to keep them on frequency. ALl these crystal > > oscillators have excellent short term stability but poor long term > > stability. > > > > The GPS system is designed to keep time very accurately, but at the > > multi-nanosecond range. Over time, GPS has perfect stability (long term), > > but in the short term it is a fairly poor reference. > > > > A GPSDO combines the best of both of these worlds: It uses a base > > oscillator with good short-term stability (a TCXO) and then uses a GPS to > > adjust it over time, or discipline it, to stay on frequency. With a GPSDO > > you have excellent short and long term stability. > > > > The optional GPSDO in the FLEX-6000 Signature Series radios provides both > > frequency and time information to the radio. The 10MHz output of the GPSDO > > is used as the reference for the master clock in the FLEX-6000 ensuring the > > radio is always on frequency. The time information can be used in the > > future for a number of situations where time information is important in > > communications and station operation. > > > > Steve > > > > Stephen Hicks, N5AC > > VP Engineering > > FlexRadio Systems™ > > 4616 W Howard Ln Ste 1-150 > > Austin, TX 78728 > > Phone: 512-535-4713 x205 > > Email: [email protected] > > Web: www.flexradio.com > > Click Here for PGP Public > > Key<https://sites.google.com/a/flex-radio.com/pgp-public-keys/n5ac> > > > > > > > > *Tune In Excitement™* > > PowerSDR™ is a trademark of FlexRadio Systems > > > > > > Steve > > > > Stephen Hicks, N5AC > > VP Engineering > > FlexRadio Systems™ > > 4616 W Howard Ln Ste 1-150 > > Austin, TX 78728 > > Phone: 512-535-4713 x205 > > Email: [email protected] > > Web: www.flexradio.com > > Click Here for PGP Public > > Key<https://sites.google.com/a/flex-radio.com/pgp-public-keys/n5ac> > > > > > > > > *Tune In Excitement™* > > PowerSDR™ is a trademark of FlexRadio Systems > > > > > > On Sat, May 25, 2013 at 6:58 PM, Jim Jerzycke <[email protected]> wrote: > > > >> It stands for "GPS Disciplined Oscillator", a method of locking a very > >> good crystal oscillator to the 1 pulse-per-second output of a GPS receiver. > >> > >> 73, Jim KQ6EA > >> > >> > >> On 05/25/2013 09:17 PM, John Molenda wrote: > >> > >>> Can someone explain to me please what the GPSDO is for on the 6000 > >>> series radios . Thanks John Kb2huk > >>> On 5/25/2013 4:44 PM, Mike Valentine wrote: > >>> > >>>> Hi All, > >>>> > >>>> As the time approaches for my 6700 with GPSDO to arrive, I'm wondering > >>>> about the best solution for an outdoor GPS antenna. > >>>> > >>>> Any ideas for me? > >>>> > >>>> Mike - W8MM - EM79sd > >>>> > >>>> ______________________________**_________________ > >>>> Flexedge mailing list > >>>> [email protected] > >>>> http://mail.flex-radio.biz/**mailman/listinfo/flexedge_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz> > >>>> This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is > >>>> used for posting topics related to SDR software innovation and other > >>>> technical SDR topics. > >>>> > >>> > >>> ______________________________**_________________ > >>> Flexedge mailing list > >>> [email protected] > >>> http://mail.flex-radio.biz/**mailman/listinfo/flexedge_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz> > >>> This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is > >>> used for posting topics related to SDR software innovation and other > >>> technical SDR topics. > >>> > >>> > >> > >> ______________________________**_________________ > >> Flexedge mailing list > >> [email protected] > >> http://mail.flex-radio.biz/**mailman/listinfo/flexedge_**flex-radio.biz<http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz> > >> This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is > >> used for posting topics related to SDR software innovation and other > >> technical SDR topics. > >> > > > > > _______________________________________________ > Flexedge mailing list > [email protected] > http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz > This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used > for posting topics related to SDR software innovation and other technical SDR > topics. _______________________________________________ Flexedge mailing list [email protected] http://mail.flex-radio.biz/mailman/listinfo/flexedge_flex-radio.biz This is the FlexRadio Systems e-mail Reflector called FlexEdge. It is used for posting topics related to SDR software innovation and other technical SDR topics.
