Ed
Thank you for your interest. I have checked many of the circuits which is
made easy in some cases because it is a duplication of the M100 in some
areas and the FRS in others. I have both for comparison. Do to the very high
densely packaging is it not easy to probe since some of the
On 04/02/2012 02:33 AM, ewkeh...@aol.com wrote:
Magnus
I am systematically checking every thing. Power is every where, get a very
strong 60 MHz with the 5.3125 clearly visible on the spectrum analyzer also
counted both with a counter, checked the 85 Hz modulation on the tuning
diode, is a
Magnus
RC oscillator and demodulator along with the 1 uF and integrator are all
standard Efratom, use different pins and the oscillator is 2.72 KHz the
problem is the signal path from the detector to the demodulator. That is what
I
am looking for. Will get there. will take time.
Thanks
I have some SPTB-100 units, which are similar to M100 units, which
may be similar to yours. A few years ago, one failed to lock,
regardless of adjustment, and I found that one of the integrator
capacitors in the OCXO control loop was very leaky. I don't recall
which one, and couldn't even
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
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
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
The JM38510/11201BCA crosses to a LM139 which is the Mil-Spec version of
the LM339.
Mike
On 4/1/2012 2:39 PM, ewkeh...@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
Thanks Mike
In a message dated 4/1/2012 4:33:51 P.M. Eastern Daylight Time,
mbla...@satx.rr.com writes:
The JM38510/11201BCA crosses to a LM139 which is the Mil-Spec version of
the LM339.
Mike
On 4/1/2012 2:39 PM, ewkeh...@aol.com wrote:
Paul thank you.
I tried google and only
Bert,
On 04/01/2012 07:50 PM, ewkeh...@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
Magnus
I am systematically checking every thing. Power is every where, get a very
strong 60 MHz with the 5.3125 clearly visible on the spectrum analyzer also
counted both with a counter, checked the 85 Hz modulation on the tuning
diode, is a small signal but the same on my working M 100.
Just received a Efratom M3100. I have no information and before I power it
up I like to know if any one has experience with this unit. Looking at the
construction it is definitely mil quality, machined frames, JX and JM
parts,mil connector etc. Definitely not a low cost version. Date Code
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