[time-nuts] Efratom M3100

[Michael Blazer]

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 at 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 at 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 at 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
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