Of Mike Feher
Sent: Sunday, July 22, 2007 9:58 PM
To: 'Discussion of precise time and frequency measurement'
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Highly unlikely, but, possible, especially if it was in a corrosive
atmosphere. Of course then I would expect to see evidence
: [time-nuts] HP 5370B low frequency modulation
Highly unlikely, but, possible, especially if it was in a corrosive
atmosphere. Of course then I would expect to see evidence of corrosion on
other components. ...
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
Subject: Re: [time-nuts] HP 5370B low frequency modulation
I have heard of assembly lines that do not allow any gold
whatsoever in the building!
That sounds totally unjustified. It's not like gold is going
to jump at the solder joint and contaminate it cold.
The effect of gold contamination
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From: Didier Juges [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Date: Thu, 30 Aug 2007 18:10:56 -0500
Message-ID: [EMAIL PROTECTED]
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Sent: Thursday, August 30, 2007 6:41 PM
To: time-nuts@febo.com; [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B low frequency modulation
From: Didier Juges [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Date: Thu, 30 Aug 2007 18:10
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This is an interesting discussion about gold. Thanks to all
those who have posted. My question is -- I've noticed that
almost all my old HP instruments, from the 60's and some
decades thereafter, use a large amount of gold on
and frequency measurement
Subject: Re: [time-nuts] HP 5370B low frequency modulation, gold
This is an interesting discussion about gold. Thanks to all
those who have posted. My question is -- I've noticed that
almost all my old HP instruments, from the 60's and some
decades thereafter, use
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From: [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Date: Thu, 26 Jul 2007 14:51:27 EDT
Message-ID: [EMAIL PROTECTED]
Said,
Hi Magnus,
I've had a board with what the manufacturer called
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From: Björn_Gabrielsson [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Date: Thu, 26 Jul 2007 22:23:09 +0200 (CEST)
Message-ID: [EMAIL PROTECTED]
Björn,
Magnus might be busy until after
Hi Didier,
The reason that SMA connectors don't go above 21GHz is there is
a wicked discontinuity in the female connector. The 141's shield
comes flush with the connector/nut's body, but only the nut's body
touches the shield of the connector. That leaves a step from the
coax shield to the
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Of course, any method is only as good as it is implemented. Crimping gets
rid of a number of chemistry problems, and creates few problems in return.
One problem with crimping coax cables is that crimping the braid is usually
done
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Didier Juges said the following on 07/28/2007 09:39 AM:
One problem with crimping coax cables is that crimping the braid is usually
done against the plastic (term used generically) insulation between the
center conductor and the
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John Ackermann N8UR said the following on 07/28/2007 09:58 AM:
I don't know that I've ever seen any crimp connectors that don't have a
sleeve between the coax and the dielectric. Maybe I've just been living
right...
Argh! I
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Didier Juges wrote:
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Of course, any method is only as good as it is implemented. Crimping gets
rid of a number of chemistry problems, and creates few problems in
PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Chuck Harris
Sent: Saturday, July 28, 2007 9:27 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Didier Juges wrote:
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Hi Didier,
I believe you are mistaken about what holds a crimp SMA connector together.
The crimp force is entirely taken up in trying to constrict the circumference
of the solid copper jacket. Because a cylinder is one of those perfect
structures discovered by the ancients, this crimping
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I have made
numerous shielded opens for network analyzer use by crimping an
SMA connector
nut onto a piece of copper semi-rigid shield tube without using any center
insulator, or center pin.
You can (supposedly) mess up an
Hi Magnus,
The 5372A which we bought new years ago reference polluted by the
switching power supplies. There were more of them with different
frequencies. It showed up in the fft of measurements and also seen at
the reference output. I do not have access to that instrument anymore
and do
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John Miles wrote:
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I have made
numerous shielded opens for network analyzer use by crimping an
SMA connector
nut onto a piece of copper semi-rigid shield tube
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Hi Didier,
I believe you are mistaken about what holds a crimp SMA connector together.
The crimp force is entirely taken up in trying to constrict the
circumference
of the solid copper jacket. Because a cylinder is one of those perfect
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I was surprised to read that crimping is considered most reliable. I
work in broadcast television, and we have rows and rows of video
patch panels. Decades ago, the coaxs were soldered to the MUSA
connectors on the bay, but in
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Good day,
*** REPLY SEPARATOR ***
On 27-Jul-07 at 08:29 Peter Vince wrote:
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I was surprised to read that crimping is considered most reliable...
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In a message dated 7/27/2007 06:23:33 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
has the same strength and gas tightness of a cold weld. I've been
fortunate, over the years, to have gotten hold of the right tools and dies
Hello all together,
nice to find an expert on wiring procedures, all your comments are fully
correct Bruce!
For the Boeing B747/ B727/ B737 etc. we had of course all kind of tools for all
the different MIL a
nd aerospace connectors and wire-types available. Unfortunately these are quite
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From: Didier Juges [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Date: Mon, 23 Jul 2007 21:12:39 -0500
Message-ID: [EMAIL PROTECTED]
Brooke,
Thanks Bruce for the quick response, as always.
In my
[EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Date: Mon, 23 Jul 2007 21:12:39 -0500
Message-ID: [EMAIL PROTECTED]
Brooke,
Thanks Bruce for the quick response, as always.
In my business, we typically dissolve the gold by dipping the solder cup in
a hot tin pot
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Hi Said,
Magnus might be busy until after the weekend.
After fixing my Rb - Thanks!!! - and collecting a few antennas, Magnus
headed for the wilderness with a car full of beer and music festival
stuff.
btw,
Is anyone running a
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In a message dated 7/26/2007 01:28:55 Pacific Daylight Time,
[EMAIL PROTECTED] writes:
sy cooling flange. On another board we glued a nut to the top of the BGA
and hanged 50-70 kg of it and while the board was clearly bent the
PROTECTED]
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Date: Sun, 22 Jul 2007 22:58:00 -0400
Message-ID: [EMAIL PROTECTED]
Mike,
Highly unlikely, but, possible, especially if it was in a corrosive
atmosphere. Of course then I would expect to see evidence of corrosion
on
other
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From: Björn_Gabrielsson [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Date: Mon, 23 Jul 2007 09:34:35 +0200 (CEST)
Message-ID: [EMAIL PROTECTED]
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time and frequency measurement'
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Highly unlikely, but, possible, especially if it was in a corrosive
atmosphere. Of course then I would expect to see evidence of corrosion on
other components.
...
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell
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Magnus,
Have you used your 5372A reference output to drive the 5370B ref in?
Certainly easier than switching 10811As.
Pete Rawson
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time-nuts mailing list -- time-nuts@febo.com
To
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Maybe some of you haven't seen this oscilloscope clock display yet:
http://www.makezine.com/blog/archive/2007/07/avr_oscilloscope_clock.html
--
Margaret Stephanie Leber CCP, SCJP, SCWCD
http://voicenet.com/~maggie
AOPA 925383
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Brooke Clarke wrote:
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Hi Didier:
Would you elaborate on the comment Gold plated connectors are a well known
example. Do you mean when soldered with Lead Tin
] [mailto:[EMAIL PROTECTED] On
Behalf Of Dr Bruce Griffiths
Sent: Monday, July 23, 2007 9:29 AM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Brooke Clarke wrote:
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From: Dr Bruce Griffiths [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Date: Mon, 23 Jul 2007 11:14:25 +1200
Message-ID: [EMAIL PROTECTED]
Hej Magnus
Hej Bruce,
Oscillation/cycling of oven
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Magnus Danielson wrote:
Hej Bruce,
Oscillation/cycling of oven temperature?
Oven controller oscillation?
Might be, but then my loadingcondition has caused the oven control out of
stability. This would certainly
Hej Magnus
Since the 10811 oven heater supply in a 5370 is unregulated one possible
cause is a quasi periodic variation of the mains supply voltage.
Bruce
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Sent: Sunday, July 22, 2007 9:39 PM
To: Magnus Danielson; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B low frequency modulation
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Hej Magnus
Could there perhaps be an intermittent thermal fuse
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Mike Feher wrote:
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I believe it is almost impossible to have an intermittent thermal fuse due
to their very clever design. Although over age they can open up. Once
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Dr Bruce Griffiths
Sent: Sunday, July 22, 2007 10:32 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Mike Feher wrote:
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From: Mike Feher [EMAIL PROTECTED]
Subject: Re: [time-nuts] HP 5370B low frequency modulation
Date: Sun, 22 Jul 2007 22:58:00 -0400
Message-ID: [EMAIL PROTECTED]
Mike,
Highly unlikely, but, possible, especially
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