On 03/31/12 09:38 PM, Jim Lux wrote:
On 3/31/12 1:15 PM, Brooke Clarke wrote:
Hi Achim:
SMA RF connectors have a very limited life (number of matings) until
they are worn out.
I don't think so. Yes, they're only rated for 500 cycles, but there's a
paper by a guy at Maury Microwave that I ran
Yes, I recommend using MCX/SMB. We use MCX, SMB and MMCX but the MMCX in my
opinion is to avoid.
On Sun, Apr 1, 2012 at 12:13 AM, Magnus Danielson
mag...@rubidium.dyndns.org wrote:
On 03/31/2012 10:08 PM, Javier Serrano wrote:
On Sat, Mar 31, 2012 at 9:24 PM, Achim
Said,
how complex is your 20pS time interval counter? Is it analog, FPGA,
something else (if you can disclose some info, of course)?
On Sat, Mar 31, 2012 at 11:44 PM, Hal Murray hmur...@megapathdsl.netwrote:
mar...@ptsyst.com said:
I’ve seen that the peak to peak jitter is reduced from
On 04/01/2012 01:01 PM, Azelio Boriani wrote:
Yes, I recommend using MCX/SMB. We use MCX, SMB and MMCX but the MMCX in my
opinion is to avoid.
MMCX might be used in internal connections.
Cheers,
Magnus
___
time-nuts mailing list --
Hello Ernie,
please allow me to correct your use of my first name. It is Ulrich and not
Ulbrich. I attach great importance to this difference because a certain
Walter Ulbricht was one of the leading politicians in the communist terror
regime of the former so called German Democratic Republic and
On 4/1/12 3:01 AM, Dr. David Kirkby wrote:
On 03/31/12 09:38 PM, Jim Lux wrote:
On 3/31/12 1:15 PM, Brooke Clarke wrote:
Hi Achim:
SMA RF connectors have a very limited life (number of matings) until
they are worn out.
I don't think so. Yes, they're only rated for 500 cycles, but there's a
If you think about it, tightening torque only relates very roughly to
axial mating pressure.
Torque is essentially the force requires to push an object up an inclined
plane.
That is the sum of two components, the normal component of the mating
force plus the in plane component of (mating
Yes we use it for the GPS antenna internal connection then on the panel we
use the N connector. Anyway the MMCX seems so sloppy... not robust and
steady as a MCX.
On Sun, Apr 1, 2012 at 1:24 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
On 04/01/2012 01:01 PM, Azelio Boriani wrote:
Hal Murray hmurray at megapathdsl.net
Would you please say more? Or post pictures?
Where did you find a 200 ms PPS pulse?
The circuitry I added takes the narrow positive going timing pulse
(2V/25us) on pin 2 of the surface mounted Lucent 1141 IC (U5)
near the DB25 output connector on the main
Thank you for sharing your filter implementation. I'll study it.
On Sun, Apr 1, 2012 at 1:42 PM, Ulrich Bangert df...@ulrich-bangert.dewrote:
Hello Ernie,
please allow me to correct your use of my first name. It is Ulrich and
not
Ulbrich. I attach great importance to this difference because
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
On 04/ 1/12 03:33 PM, Jim Lux wrote:
On 4/1/12 3:01 AM, Dr. David Kirkby wrote:
On 03/31/12 09:38 PM, Jim Lux wrote:
I don't think so. Yes, they're only rated for 500 cycles, but there's a
paper by a guy at Maury Microwave that I ran across when trying to get
statistics on the reflection
Agreed. The TBolt is the best.
On Sun, Apr 1, 2012 at 9:10 PM, shali...@gmail.com wrote:
The need for sawtooth correction comes from the fact that standalone GPS
receivers use a standard clock oscillator that is basically fixed frequency
(save for temperature and other fluctuations) and their
My Heathkit, and other AC clocks have been broken for months now. I started
a project to figure out how bad it was. It's getting interesting as I am
approaching my goal of coding a software emulation of an AC line clock.
During the process I developed a couple of web pages to help me understand
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
Fellow time-nuts,
I'm sure you all have done this at least once. Repaired something up,
feeling happy about it, slap it in and then if fails on you again.
The transformer in the DC-DC converter failed again. Popped the lid even.
*sigh* I think I will have to rebuild that from scratch.
Hi Ed,
Welcome to the group and thanks for sharing that 60 Hz mains
project. Nice use of a 5316B and Prologix adapter to collect the
frequency data and Python and JavaScript to display live plots.
Is there a URL for the raw data files (the YYYMMMDDHH.DAT
files mentioned in code_2.txt)? I'd like
Yes thats what makes old gear fun.
It costs $0 up front and lots of time ongoing.
:-)
On Sun, Apr 1, 2012 at 7:44 PM, Magnus Danielson mag...@rubidium.dyndns.org
wrote:
Fellow time-nuts,
I'm sure you all have done this at least once. Repaired something up,
feeling happy about it, slap it in
On 4/1/12 2:25 PM, Dr. David Kirkby wrote:
On 04/ 1/12 03:33 PM, Jim Lux wrote:
On 4/1/12 3:01 AM, Dr. David Kirkby wrote:
On 03/31/12 09:38 PM, Jim Lux wrote:
I don't think so. Yes, they're only rated for 500 cycles, but there's a
paper by a guy at Maury Microwave that I ran across when
Ed,
Your old signal generator frequency is regulated by stable components.
The power grid frequency cannot be regulated because it is distributed
over thousands of generators. Mathematical models are not stable, as
people switch loads on and off. Regulation is done by human dispatchers
calling
On 4/1/2012 3:18 PM, Ed Mersich wrote:
My Heathkit, and other AC clocks have been broken for months now. I started
a project to figure out how bad it was. It's getting interesting as I am
approaching my goal of coding a software emulation of an AC line clock.
During the process I developed a
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.
On 4/1/2012 4:53 PM, paul swed wrote:
Yes thats what makes old gear fun.
It costs $0 up front and lots of time ongoing.
:-)
On Sun, Apr 1, 2012 at 7:44 PM, Magnus Danielsonmag...@rubidium.dyndns.org
wrote:
Fellow time-nuts,
I'm sure you all have done this at least once. Repaired something up,
Ed,
Perhaps it is more important that the mains have long-term accuracy, rather
than short-term stability. That is, there should not be any increasing
error in the time shown on an analog clock, and ideally it should never be
more than a few seconds slow or fast. Major load shifts that cause
I used to have a webpage bookmarked where they did this. The author of
the page hooked up a hydrogen maser to an HP3325b set to 60 Hz then
drove an HP bipolar amplifier with the 3325 to drive a mechanical flip
clock at 100 VAC @ 60.00 Hz. Interesting page, is billed as Worlds
most
That's it!!
From: Tom Van Baak t...@leapsecond.com
To: Discussion of precise time and frequency measurement time-nuts@febo.com
Sent: Sun, April 1, 2012 5:59:11 PM
Subject: Re: [time-nuts] 60Hz More or Less
I used to have a webpage bookmarked where they did
Hi Azelio,
its a dual slope interpolator, much like the HP 5334A counter. In fact the
5334A service manual is very nice to go through to get lectured on how this
works. The capture hardware is similar to the Linear Tech app note written by
Jim Williams (mentioned in the time nuts archives).
Magnus,
If you are referring to the A15 board, I may have a spare.
I have been collecting parts for a couple of years and I *think* have
everything except the A12A1 Spectral Lamp Oscillator Assembly. I have found
some dead parts on some boards that I have replaced and, as best I can tell
from
32 matches
Mail list logo
