There is also a nice pdf out there by Peter Garde that tells how to add a GPS receiver to the non-GPD RFTG. It involves moving around 6 0-ohm (?) resistors and plugging in an old Motorola (UT+) receiver. I found the pdf on EEVBLOG. https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwiq3pafqr_XAhVFOyYKHT-MAr0QFggmMAA&url=https%3A%2F%2Fwww.eevblog.com%2Fforum%2Ftestgear%2Feconomical-option-for-precision-frequency-reference%2F%3Faction%3Ddlattach%3Battach%3D172662&usg=AOvVaw35zt-sQAGprChGTOHL9aFV

I remember seeing that pdf and thinking that the Motorola UT+ mounts look a lot like the Motorola 12+ and was wondering if would just fit. I'll go back and look. Thanks. On 15 Nov 2017 at 0:38, Mark Sims wrote: > There is also a nice pdf out there by Peter Garde that tells how to add a GPS receiver to the non-GPD RFTG. It involves moving around 6 0-ohm (?) resistors and plugging in an old Motorola (UT+) receiver. I found the pdf on EEVBLOG. > > https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwiq3pafqr_XAhVFOyYKHT-MAr0QFggmMAA&url=https%3A%2F%2Fwww.eevblog.com%2Fforum%2Ftestgear%2Feconomical-option-for-precision-frequency-reference%2F%3Faction%3Ddlattach%3Battach%3D172662&usg=AOvVaw35zt-sQAGprChGTOHL9aFV > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

Mark, I went back and looked at the PDF from Peter and the Oncore GPS looks quite a bit like the M12+ I have. Peter mentions something about firmware in the Oncore. Anyone know if there would be an issue between using the Oncore and the 12+? If this works then I can just drop in my 12+, remove a few jumpers and Bob's my uncle. I sent Peter a note. Is he active on this forum? Thoughts? Jerry On 15 Nov 2017 at 0:38, Mark Sims wrote: > There is also a nice pdf out there by Peter Garde that tells how to add a GPS receiver to the non-GPD RFTG. It involves moving around 6 0-ohm (?) resistors and plugging in an old Motorola (UT+) receiver. I found the pdf on EEVBLOG. > > https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwiq3pafqr_XAhVFOyYKHT-MAr0QFggmMAA&url=https%3A%2F%2Fwww.eevblog.com%2Fforum%2Ftestgear%2Feconomical-option-for-precision-frequency-reference%2F%3Faction%3Ddlattach%3Battach%3D172662&usg=AOvVaw35zt-sQAGprChGTOHL9aFV > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

It turns out I don't have an M12+ in the TAPR GPS. I always knew I had an older model. I checked the numbers and pictures and it it just what I need, an Oncore UT+. So the first thing I need to do is get my REF1 standalone and then add this GPS to the REF0 and problem solved. I also have to get the 10Mhz out of the REF1 but that looks easy. Thanks for all the pointers. Jerry On 14 Nov 2017 at 17:33, Jerry Hancock wrote: > Mark, I went back and looked at the PDF from Peter and the Oncore GPS looks quite a bit > like the M12+ I have. Peter mentions something about firmware in the Oncore. Anyone > know if there would be an issue between using the Oncore and the 12+? > > If this works then I can just drop in my 12+, remove a few jumpers and Bob's my uncle. > > I sent Peter a note. Is he active on this forum? > > Thoughts? > > Jerry > > On 15 Nov 2017 at 0:38, Mark Sims wrote: > > > There is also a nice pdf out there by Peter Garde that tells how to add a GPS receiver to the non-GPD RFTG. It involves moving around 6 0-ohm (?) resistors and plugging in an old Motorola (UT+) receiver. I found the pdf on EEVBLOG. > > > > https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwiq3pafqr_XAhVFOyYKHT-MAr0QFggmMAA&url=https%3A%2F%2Fwww.eevblog.com%2Fforum%2Ftestgear%2Feconomical-option-for-precision-frequency-reference%2F%3Faction%3Ddlattach%3Battach%3D172662&usg=AOvVaw35zt-sQAGprChGTOHL9aFV > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there.

Am 15.11.2017 um 05:06 schrieb Jerry Hancock: > problem solved. I also have to get the 10Mhz out of the REF1 but that looks easy. It is best to just double the 5 MHz that comes straight from the MTI-260 oven. <  http://www.hoffmann-hochfrequenz.de/downloads/DoubDist.pdf > regards, Gerhard