Hi So how does the 5 MHz get into the FPGA and / or CPU? In order to discipline the OCXO and to generate the PPS, there must be a path. If that path is independent of the 15 MHz (or 15 and 10) multiplier(s) then you have a lot of things you can do. If either of the existing multipliers need to be kept running, that limits you a bit. Bob > On Dec 3, 2014, at 8:40 PM, paul swed <paulswedb@gmail.com> wrote: > > On the output of the crystal oscillator you will want to buffer it and then > do whatever you like. Its a sine wave and as I recall of fair level several > volts. I did see a bit of distortion on the sine wave. It can be obtained > at J8 the unpopulated jack. > Now back to putting it in its case. > Regards > Paul > WB8TSL > > On Wed, Dec 3, 2014 at 7:33 PM, Gerhard Hoffmann <dk4xp@arcor.de> wrote: > >> Am 04.12.2014 um 00:04 schrieb paul swed: >> >>> Have successfully tapped into the clean 10 MHz of the the Lucent and using >>> a EL2020 50 Mhz current opamp have a very nice 10 Mhz sine wave out. Any >>> spurs are down at least 43 db. Close in at 4Khz total span or 500 Hz/div I >>> don't see anything down to at least 65 db. Thats the best detail the HP >>> 8568B will allow. >>> >> >> Congrats! >> >> >> Can't help to ask some questions: >> The MTI-260, is that a CMOS level or a sine output version on 5 MHz? >> Where I'm right now, I have the Lucent pair, one of them dismantled, >> but no power supply & no scope, that has to wait until the weekend. >> >> I'd like to make a small board that directly takes the 5 MHz from the >> Osc, buffers it, doubles it with the NIST FET doubler and provides 4 SMA >> +12dBm outputs at 10 MHz via 4*AD8009 or LMH6702. >> There is enough free space on the front plate. >> I'd like to hear that the osc delivers a sine, since that makes >> doubling easier. >> >> BTW I have another 10 MHz MTI-260 and did measure phase noise with >> an E5052B. That was not so funny. Probably it's orientiented towards >> long term stability at the cost of noise with absolutely minimum crystal >> dissipation. I'd like to repeat the measurement under better controlled >> environmental conditions b4 I tell numbers. >> But it seems that Morion rulez, noise-wise. >> >> regards, Gerhard >> >> >> >> _______________________________________________ >> 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.

" The OCXO in the TBolt beats the Morion parts by a wide margin. Bob " in what way dies it? phase noise ? harmonics? standalone frequency stability? 73 Alex

J8 its unpopulated right next to the oven. Regards Paul WB8TSL On Wed, Dec 3, 2014 at 7:36 PM, Doug Ronald <doug@dougronald.com> wrote: > I may have missed this info in a previous post, but I am interested in > tapping off the 5 MHz signal. I have my REF-1 apart, but don't have it > powered. I will buffer the signal, and suspect the 5 MHz is available right > around Q205, but it might be up around Q204 or Q203. Could someone advise > me as to exactly where to pick off a nice 5 MHz sine wave? > Thanks, > -Doug R. > -----Original Message----- > From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of paul swed > Sent: Wednesday, December 03, 2014 3:05 PM > To: Time-nuts > Subject: [time-nuts] Lucent KS-24361 10 Mhz out success. > > Have successfully tapped into the clean 10 MHz of the the Lucent and using > a EL2020 50 Mhz current opamp have a very nice 10 Mhz sine wave out. Any > spurs are down at least 43 db. Close in at 4Khz total span or 500 Hz/div I > don't see anything down to at least 65 db. Thats the best detail the HP > 8568B will allow. > > To get the signal out of the Lucent I sliced the 15 Mhz trace and injected > the 10 Mhz into the SMA output connector. > > I am sure there are many other amplifiers and methods that could be used > but this ones working well and can drive some real coax lengths. > > Now the really hard part. Mounting it and the power supply into a rack > panel. > Regards > Paul > WB8TSL > _______________________________________________ > 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. >

I have a pix of the point to tap. Its on the bottom of the board. Not sure I can skinny it down to fit Time Nuts has to be sub 100K. I will tinker tomorrow night and see if I can get it down. Regards On Wed, Dec 3, 2014 at 10:40 PM, paul swed <paulswedb@gmail.com> wrote: > J8 its unpopulated right next to the oven. > Regards > Paul > WB8TSL > > On Wed, Dec 3, 2014 at 7:36 PM, Doug Ronald <doug@dougronald.com> wrote: > >> I may have missed this info in a previous post, but I am interested in >> tapping off the 5 MHz signal. I have my REF-1 apart, but don't have it >> powered. I will buffer the signal, and suspect the 5 MHz is available right >> around Q205, but it might be up around Q204 or Q203. Could someone advise >> me as to exactly where to pick off a nice 5 MHz sine wave? >> Thanks, >> -Doug R. >> -----Original Message----- >> From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of paul >> swed >> Sent: Wednesday, December 03, 2014 3:05 PM >> To: Time-nuts >> Subject: [time-nuts] Lucent KS-24361 10 Mhz out success. >> >> Have successfully tapped into the clean 10 MHz of the the Lucent and >> using a EL2020 50 Mhz current opamp have a very nice 10 Mhz sine wave out. >> Any spurs are down at least 43 db. Close in at 4Khz total span or 500 >> Hz/div I don't see anything down to at least 65 db. Thats the best detail >> the HP 8568B will allow. >> >> To get the signal out of the Lucent I sliced the 15 Mhz trace and >> injected the 10 Mhz into the SMA output connector. >> >> I am sure there are many other amplifiers and methods that could be used >> but this ones working well and can drive some real coax lengths. >> >> Now the really hard part. Mounting it and the power supply into a rack >> panel. >> Regards >> Paul >> WB8TSL >> _______________________________________________ >> 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. >> > >

Well that was easier then I thought. Here is the tap off point. Bottom of the board. I have not been able to trace the place it comes from. Between the two caps is a via and I have ohm'ed out lots of them and never hit the other end. I wanted to attach from the top. Also a pix of the el2020 buffer. The red coax feeds the old 15 MHz output after cutting the old trace on the bottom. Regards Paul WB8TSL On Wed, Dec 3, 2014 at 10:42 PM, paul swed <paulswedb@gmail.com> wrote: > I have a pix of the point to tap. Its on the bottom of the board. Not sure > I can skinny it down to fit Time Nuts has to be sub 100K. > I will tinker tomorrow night and see if I can get it down. > Regards > > On Wed, Dec 3, 2014 at 10:40 PM, paul swed <paulswedb@gmail.com> wrote: > >> J8 its unpopulated right next to the oven. >> Regards >> Paul >> WB8TSL >> >> On Wed, Dec 3, 2014 at 7:36 PM, Doug Ronald <doug@dougronald.com> wrote: >> >>> I may have missed this info in a previous post, but I am interested in >>> tapping off the 5 MHz signal. I have my REF-1 apart, but don't have it >>> powered. I will buffer the signal, and suspect the 5 MHz is available right >>> around Q205, but it might be up around Q204 or Q203. Could someone advise >>> me as to exactly where to pick off a nice 5 MHz sine wave? >>> Thanks, >>> -Doug R. >>> -----Original Message----- >>> From: time-nuts [mailto:time-nuts-bounces@febo.com] On Behalf Of paul >>> swed >>> Sent: Wednesday, December 03, 2014 3:05 PM >>> To: Time-nuts >>> Subject: [time-nuts] Lucent KS-24361 10 Mhz out success. >>> >>> Have successfully tapped into the clean 10 MHz of the the Lucent and >>> using a EL2020 50 Mhz current opamp have a very nice 10 Mhz sine wave out. >>> Any spurs are down at least 43 db. Close in at 4Khz total span or 500 >>> Hz/div I don't see anything down to at least 65 db. Thats the best detail >>> the HP 8568B will allow. >>> >>> To get the signal out of the Lucent I sliced the 15 Mhz trace and >>> injected the 10 Mhz into the SMA output connector. >>> >>> I am sure there are many other amplifiers and methods that could be used >>> but this ones working well and can drive some real coax lengths. >>> >>> Now the really hard part. Mounting it and the power supply into a rack >>> panel. >>> Regards >>> Paul >>> WB8TSL >>> _______________________________________________ >>> 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. >>> >> >> >

Alex wrote: >"The OCXO in the TBolt beats the Morion parts by a wide margin. Bob " > >in what way dies it? phase noise ? harmonics? standalone frequency stability? Yes, all of those (specifically referring to the Trimble p/n 37265 OCXO used in the later Tbolts that we usually see as surplus). Note that some earlier (and perhaps, later) Tbolts used different Trimble oscillators that are not as good as the 37265 with respect to phase noise, and many earlier Tbolts used a rather undistinguished Piezo (brand) OCXO. Best regards, Charles

Hi > On Dec 3, 2014, at 9:34 PM, Alex Pummer <alex@pcscons.com> wrote: > > " > > The OCXO in the TBolt beats the Morion parts by a wide margin. In the context of the message that was a reply to; Phase noise Bob > > Bob " > > > in what way dies it? phase noise ? harmonics? standalone frequency stability? > 73 > Alex > > > _______________________________________________ > 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.

Hi Of course the point I made is not as useful as it might be.There are a ton of Morions out there and very few Trimble OCXO’s outside of TBolts. I doubt anybody is going to scrap out a working TBolt for it’s OCXO :). Once you get them surplus, there is no reason to believe the Trimble parts survive the scrap out process any better than the Morions. Also since the TBolt they came out of is worth *far* more than the OCXO, it’s not at all clear why you would pull one from a working unit. If they unit was broke - was it the OCXO ?? Hmmmm….. Bob > On Dec 4, 2014, at 4:10 AM, Charles Steinmetz <csteinmetz@yandex.com> wrote: > > Alex wrote: > >> "The OCXO in the TBolt beats the Morion parts by a wide margin. Bob " >> >> in what way dies it? phase noise ? harmonics? standalone frequency stability? > > Yes, all of those (specifically referring to the Trimble p/n 37265 OCXO used in the later Tbolts that we usually see as surplus). > > Note that some earlier (and perhaps, later) Tbolts used different Trimble oscillators that are not as good as the 37265 with respect to phase noise, and many earlier Tbolts used a rather undistinguished Piezo (brand) OCXO. > > Best regards, > > Charles > > > > _______________________________________________ > 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.