Paul thank you. I tried google and only got links to advertise other parts. Makes sense, unit has a summary bit output, probably checks 4 levels and gives a lock output. Different from M100 and other Efratom products. Still hunting for the 85 Hz, 127 Hz on the M100 is 5V pp into the phase detector. can not rule out the actual cell, maybe the step recovery diode. Will try every thing else before I go there. Bert. In a message dated 4/1/2012 3:14:55 P.M. Eastern Daylight Time, paulswedb@gmail.com writes: Strange indeed Bert I put the whole number into google and had 5 hits. The first number is actually JM then the number but its a quad voltage comparator according to the data archive. pdf is available and looks like numbers of manufacturers made it. PMI TI Nat nalog dev. They are still available also. Regards Paul. On Sun, Apr 1, 2012 at 1:50 PM, <EWKehren@aol.com> wrote: > In the past I have asked if some one has any info of the Efratom M3100. I > have carefully dissected the unit and checked functionality. It sweeps but > does not lock. Lamp signal is strong 60 MHz and 5.xx all work properly > and > can be seen on a spectrum analyzer The problem is in the loop and there is > not enough signal into the phase detector. Trying to follow the detector > output is challenging because lack of information and packaging density. > Typical loop frequency in a M100 is 127/254 in this case I see 85/160. I > would > expect in a military application they would go up not down for vibration > purposes. Tracing the circuits is also made more difficult because of the > use > of mil parts and mil nomenclature. I have most cross correlated and I am > down to one PMI part 38510/11201BCA. Does any one have any info, such a > nice unit, would like to make it work. > Thanks Bert Kehren > _______________________________________________ > 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 JM38510/11201BCA crosses to a LM139 which is the Mil-Spec version of the LM339. Mike On 4/1/2012 2:39 PM, EWKehren@aol.com wrote: > Paul thank you. > I tried google and only got links to advertise other parts. Makes sense, > unit has a summary bit output, probably checks 4 levels and gives a lock > output. Different from M100 and other Efratom products. Still hunting for the > 85 Hz, 127 Hz on the M100 is 5V pp into the phase detector. can not rule > out the actual cell, maybe the step recovery diode. Will try every thing else > before I go there. > Bert. > > > In a message dated 4/1/2012 3:14:55 P.M. Eastern Daylight Time, > paulswedb@gmail.com writes: > > Strange indeed Bert I put the whole number into google and had 5 hits. The > first number is actually JM then the number but its a quad voltage > comparator according to the data archive. pdf is available and looks like > numbers of manufacturers made it. PMI TI Nat nalog dev. They are still > available also. > Regards > Paul. > > On Sun, Apr 1, 2012 at 1:50 PM,<EWKehren@aol.com> wrote: > >> In the past I have asked if some one has any info of the Efratom M3100. I >> have carefully dissected the unit and checked functionality. It sweeps > but >> does not lock. Lamp signal is strong 60 MHz and 5.xx all work properly >> and >> can be seen on a spectrum analyzer The problem is in the loop and there > is >> not enough signal into the phase detector. Trying to follow the detector >> output is challenging because lack of information and packaging density. >> Typical loop frequency in a M100 is 127/254 in this case I see 85/160. I >> would >> expect in a military application they would go up not down for vibration >> purposes. Tracing the circuits is also made more difficult because of > the >> use >> of mil parts and mil nomenclature. I have most cross correlated and I am >> down to one PMI part 38510/11201BCA. Does any one have any info, such a >> nice unit, would like to make it work. >> Thanks Bert Kehren >> _______________________________________________ >> 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. > > _______________________________________________ > 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. > >