FW: Plugs on the FE 70E
Dave -
Like I said, I knew it was "triaxial", but I just have never seen this
configuration. I am sure there are a lot of other things I have yet to see.
Regardless, like I said, this looks like it is going to be a project of
changing out all of the connectors. Attached are a couple of quickly taken
photos, reduced in resolution for quick access. One shows part of the rear
of the distribution amp whit the female sockets and the other the male end
of a terminating connector that came with the set. Seems everything I get on
ebay turns into a project. I have seen isolated BNCs before, like on
Tektronix scopes, but these are new to me. But who knows, if I look hard
enough in the basement I just may find a bunch of mating sockets. Thanks for
the help. Regards - Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
-----Original Message-----
From: Dr. David Kirkby [mailto:drkirkby@medphys.ucl.ac.uk]
Sent: Monday, June 20, 2005 11:17 AM
To: Mike Feher
Subject: Re: Plugs on the FE 70E
A couple like me suggested trixial. It will be no confort to you to know
that I threw about 50m of
that out less than 3 months ago. We must have bought a reel at work for
something, and when we moved,
it was thrown, thinking it would never be used again.
I might be able to find the odd plug if you need it.
Mike Feher wrote:
Dave -
Good idea - I was thinking of doing that at some point anyway, but,
thought
someone may know them right away. Thanks - Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
-----Original Message-----
From: Dr. David Kirkby [mailto:drkirkby@medphys.ucl.ac.uk]
Sent: Monday, June 20, 2005 10:39 AM
To: mfeher@eozinc.com
Subject: Plugs on the FE 70E
Could you not post a picture - someone might reconise them.
--
Dr. David Kirkby PhD CEng MIEE,
Senior Research Fellow,
Department of Medical Physics,
Mallet Place Engineering Building,
Gower St,
University College London,
London WC1E 6BT.
Yep,
That is the same type used by HP and Keithley as input connectors on some
of their volt meters.
-Chuck
Mike Feher wrote:
Dave -
Like I said, I knew it was "triaxial", but I just have never seen this
configuration. I am sure there are a lot of other things I have yet to see.
Regardless, like I said, this looks like it is going to be a project of
changing out all of the connectors. Attached are a couple of quickly taken
photos, reduced in resolution for quick access. One shows part of the rear
of the distribution amp whit the female sockets and the other the male end
of a terminating connector that came with the set. Seems everything I get on
ebay turns into a project. I have seen isolated BNCs before, like on
Tektronix scopes, but these are new to me. But who knows, if I look hard
enough in the basement I just may find a bunch of mating sockets. Thanks for
the help. Regards - Mike
Chuck -
Well, I can maybe see the justification on some sensitive instruments
measuring down to the nanovolts. However, here we are talking about a good
several volts, and low impedance, where the isolation, at least from what I
would surmise, would not be as critical. My 6 1/2 digit HP voltmeter only
uses banana jacks, but, it does give you a four wire (Kelvin) connection
capability if you want to use it. Well, at least some one has seen these
before. Where have I been all my life? -
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of Chuck Harris
Sent: Monday, June 20, 2005 12:49 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FW: Plugs on the FE 70E
Yep,
That is the same type used by HP and Keithley as input connectors on some
of their volt meters.
-Chuck
Mike Feher wrote:
Dave -
Like I said, I knew it was "triaxial", but I just have never seen this
configuration. I am sure there are a lot of other things I have yet to
see.
Regardless, like I said, this looks like it is going to be a project of
changing out all of the connectors. Attached are a couple of quickly taken
photos, reduced in resolution for quick access. One shows part of the rear
of the distribution amp whit the female sockets and the other the male end
of a terminating connector that came with the set. Seems everything I get
on
ebay turns into a project. I have seen isolated BNCs before, like on
Tektronix scopes, but these are new to me. But who knows, if I look hard
enough in the basement I just may find a bunch of mating sockets. Thanks
for
the help. Regards - Mike
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Mike Feher wrote:
Regardless, like I said, this looks like it is going to be a project of
changing out all of the connectors. Attached are a couple of quickly taken
photos, reduced in resolution for quick access. One shows part of the rear
of the distribution amp whit the female sockets and the other the male end
of a terminating connector that came with the set. Seems everything I get on
ebay turns into a project. I have seen isolated BNCs before, like on
Tektronix scopes, but these are new to me. But who knows, if I look hard
enough in the basement I just may find a bunch of mating sockets. Thanks
Mike,
These triax connectors are made by Trompeter, which was revealed by a
bit of ebay searching. Here's the catalog:
http://www.trompeter.com/assets/product/PDF/T21-Military_Aero.pdf
They describe the history of the connectors in the PDF, if you're
interested. It has a lot to do with MIL 1553B stuff.
PS Pasternack has an amusing reputation around our telescopes - their
SMA adapters fall apart when looked at sideways, so we generally just
toss 'em when we run into them.
PPS Look at the Pasternack website with any browser but IE, and the
text in the menus doesn't render at all! It's impossible to navigate
their site with Netscape, Mozilla, Firefox, Safari, etc.
Dave -
Thanks for the informative URL. I have been working for the military one way
or another for almost 40 years and I still do not recall seeing any. Like I
always say "tuition never comes cheap regardless of how you pay for it". So,
even if this project does not ever progress to where I would like it, I will
have learned something, and for that it was worth it. Thanks - Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of David Forbes
Sent: Monday, June 20, 2005 1:15 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FW: Plugs on the FE 70E
Mike Feher wrote:
Regardless, like I said, this looks like it is going to be a project of
changing out all of the connectors. Attached are a couple of quickly taken
photos, reduced in resolution for quick access. One shows part of the rear
of the distribution amp whit the female sockets and the other the male end
of a terminating connector that came with the set. Seems everything I get
on
ebay turns into a project. I have seen isolated BNCs before, like on
Tektronix scopes, but these are new to me. But who knows, if I look hard
enough in the basement I just may find a bunch of mating sockets. Thanks
Mike,
These triax connectors are made by Trompeter, which was revealed by a
bit of ebay searching. Here's the catalog:
http://www.trompeter.com/assets/product/PDF/T21-Military_Aero.pdf
They describe the history of the connectors in the PDF, if you're
interested. It has a lot to do with MIL 1553B stuff.
PS Pasternack has an amusing reputation around our telescopes - their
SMA adapters fall apart when looked at sideways, so we generally just
toss 'em when we run into them.
PPS Look at the Pasternack website with any browser but IE, and the
text in the menus doesn't render at all! It's impossible to navigate
their site with Netscape, Mozilla, Firefox, Safari, etc.
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Hi Mike:
The HP DC semiconductor equipment uses these. They put "guard" on the
interior shield where guard is driven with the same voltge that's on the
center conductor. That way there's no leakage current between the
center conductor and ground allowing very small currents to be measured.
Pomona has adapters from these to ordinary coax. There are two versions
one used 2 lugs (5298)and the other used 3 lugs (5299). See:
http://www.pomonaelectronics.com/index.php?i=prodsub&parent=RFCONN&cat=TRIAXCONN&getDetails=0
73,
Brooke Clarke, N6GCE
w/Java http://www.PRC68.com
w/o Java http://www.pacificsites.com/~brooke/PRC68COM.shtml
http://www.precisionclock.com
Mike Feher wrote:
Dave -
Thanks for the informative URL. I have been working for the military one way
or another for almost 40 years and I still do not recall seeing any. Like I
always say "tuition never comes cheap regardless of how you pay for it". So,
even if this project does not ever progress to where I would like it, I will
have learned something, and for that it was worth it. Thanks - Mike
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960
-----Original Message-----
From: time-nuts-bounces@febo.com [mailto:time-nuts-bounces@febo.com] On
Behalf Of David Forbes
Sent: Monday, June 20, 2005 1:15 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FW: Plugs on the FE 70E
Mike Feher wrote:
Regardless, like I said, this looks like it is going to be a project of
changing out all of the connectors. Attached are a couple of quickly taken
photos, reduced in resolution for quick access. One shows part of the rear
of the distribution amp whit the female sockets and the other the male end
of a terminating connector that came with the set. Seems everything I get
on
ebay turns into a project. I have seen isolated BNCs before, like on
Tektronix scopes, but these are new to me. But who knows, if I look hard
enough in the basement I just may find a bunch of mating sockets. Thanks
Mike,
These triax connectors are made by Trompeter, which was revealed by a
bit of ebay searching. Here's the catalog:
http://www.trompeter.com/assets/product/PDF/T21-Military_Aero.pdf
They describe the history of the connectors in the PDF, if you're
interested. It has a lot to do with MIL 1553B stuff.
PS Pasternack has an amusing reputation around our telescopes - their
SMA adapters fall apart when looked at sideways, so we generally just
toss 'em when we run into them.
PPS Look at the Pasternack website with any browser but IE, and the
text in the menus doesn't render at all! It's impossible to navigate
their site with Netscape, Mozilla, Firefox, Safari, etc.
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
time-nuts mailing list
time-nuts@febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
Hi Mike,
I've never quite understood why the HP3437A, a 0-10V, high speed system
voltmeter uses them, but it does. The Keithly 616 makes more sense because
the extra shield allows them to run a guard. Something important on an
electrometer where the impedances are effectively infinite.
It sounds like your application doesn't need the capability, so it might be
best to swap them out for simple isolated BNC connectors.
I am certain that the mating Trompeter connectors will cost at least $20 each.
-Chuck
Mike Feher wrote:
Chuck -
Well, I can maybe see the justification on some sensitive instruments
measuring down to the nanovolts. However, here we are talking about a good
several volts, and low impedance, where the isolation, at least from what I
would surmise, would not be as critical. My 6 1/2 digit HP voltmeter only
uses banana jacks, but, it does give you a four wire (Kelvin) connection
capability if you want to use it. Well, at least some one has seen these
before. Where have I been all my life? -
Mike B. Feher, N4FS
89 Arnold Blvd.
Howell, NJ, 07731
732-886-5960